/* * Copyright © 2012-2014 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eugeni Dodonov * Daniel Vetter * */ #include #include #include "i915_drv.h" #include "intel_drv.h" /** * DOC: runtime pm * * The i915 driver supports dynamic enabling and disabling of entire hardware * blocks at runtime. This is especially important on the display side where * software is supposed to control many power gates manually on recent hardware, * since on the GT side a lot of the power management is done by the hardware. * But even there some manual control at the device level is required. * * Since i915 supports a diverse set of platforms with a unified codebase and * hardware engineers just love to shuffle functionality around between power * domains there's a sizeable amount of indirection required. This file provides * generic functions to the driver for grabbing and releasing references for * abstract power domains. It then maps those to the actual power wells * present for a given platform. */ #define for_each_power_well(i, power_well, domain_mask, power_domains) \ for (i = 0; \ i < (power_domains)->power_well_count && \ ((power_well) = &(power_domains)->power_wells[i]); \ i++) \ for_each_if ((power_well)->domains & (domain_mask)) #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \ for (i = (power_domains)->power_well_count - 1; \ i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\ i--) \ for_each_if ((power_well)->domains & (domain_mask)) bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, int power_well_id); static struct i915_power_well * lookup_power_well(struct drm_i915_private *dev_priv, int power_well_id); const char * intel_display_power_domain_str(enum intel_display_power_domain domain) { switch (domain) { case POWER_DOMAIN_PIPE_A: return "PIPE_A"; case POWER_DOMAIN_PIPE_B: return "PIPE_B"; case POWER_DOMAIN_PIPE_C: return "PIPE_C"; case POWER_DOMAIN_PIPE_A_PANEL_FITTER: return "PIPE_A_PANEL_FITTER"; case POWER_DOMAIN_PIPE_B_PANEL_FITTER: return "PIPE_B_PANEL_FITTER"; case POWER_DOMAIN_PIPE_C_PANEL_FITTER: return "PIPE_C_PANEL_FITTER"; case POWER_DOMAIN_TRANSCODER_A: return "TRANSCODER_A"; case POWER_DOMAIN_TRANSCODER_B: return "TRANSCODER_B"; case POWER_DOMAIN_TRANSCODER_C: return "TRANSCODER_C"; case POWER_DOMAIN_TRANSCODER_EDP: return "TRANSCODER_EDP"; case POWER_DOMAIN_TRANSCODER_DSI_A: return "TRANSCODER_DSI_A"; case POWER_DOMAIN_TRANSCODER_DSI_C: return "TRANSCODER_DSI_C"; case POWER_DOMAIN_PORT_DDI_A_LANES: return "PORT_DDI_A_LANES"; case POWER_DOMAIN_PORT_DDI_B_LANES: return "PORT_DDI_B_LANES"; case POWER_DOMAIN_PORT_DDI_C_LANES: return "PORT_DDI_C_LANES"; case POWER_DOMAIN_PORT_DDI_D_LANES: return "PORT_DDI_D_LANES"; case POWER_DOMAIN_PORT_DDI_E_LANES: return "PORT_DDI_E_LANES"; case POWER_DOMAIN_PORT_DSI: return "PORT_DSI"; case POWER_DOMAIN_PORT_CRT: return "PORT_CRT"; case POWER_DOMAIN_PORT_OTHER: return "PORT_OTHER"; case POWER_DOMAIN_VGA: return "VGA"; case POWER_DOMAIN_AUDIO: return "AUDIO"; case POWER_DOMAIN_PLLS: return "PLLS"; case POWER_DOMAIN_AUX_A: return "AUX_A"; case POWER_DOMAIN_AUX_B: return "AUX_B"; case POWER_DOMAIN_AUX_C: return "AUX_C"; case POWER_DOMAIN_AUX_D: return "AUX_D"; case POWER_DOMAIN_GMBUS: return "GMBUS"; case POWER_DOMAIN_INIT: return "INIT"; case POWER_DOMAIN_MODESET: return "MODESET"; default: MISSING_CASE(domain); return "?"; } } static void intel_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { DRM_DEBUG_KMS("enabling %s\n", power_well->name); power_well->ops->enable(dev_priv, power_well); power_well->hw_enabled = true; } static void intel_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { DRM_DEBUG_KMS("disabling %s\n", power_well->name); power_well->hw_enabled = false; power_well->ops->disable(dev_priv, power_well); } static void intel_power_well_get(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { if (!power_well->count++) intel_power_well_enable(dev_priv, power_well); } static void intel_power_well_put(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN(!power_well->count, "Use count on power well %s is already zero", power_well->name); if (!--power_well->count) intel_power_well_disable(dev_priv, power_well); } /* * We should only use the power well if we explicitly asked the hardware to * enable it, so check if it's enabled and also check if we've requested it to * be enabled. */ static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { return I915_READ(HSW_PWR_WELL_DRIVER) == (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); } /** * __intel_display_power_is_enabled - unlocked check for a power domain * @dev_priv: i915 device instance * @domain: power domain to check * * This is the unlocked version of intel_display_power_is_enabled() and should * only be used from error capture and recovery code where deadlocks are * possible. * * Returns: * True when the power domain is enabled, false otherwise. */ bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains; struct i915_power_well *power_well; bool is_enabled; int i; if (dev_priv->pm.suspended) return false; power_domains = &dev_priv->power_domains; is_enabled = true; for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { if (power_well->always_on) continue; if (!power_well->hw_enabled) { is_enabled = false; break; } } return is_enabled; } /** * intel_display_power_is_enabled - check for a power domain * @dev_priv: i915 device instance * @domain: power domain to check * * This function can be used to check the hw power domain state. It is mostly * used in hardware state readout functions. Everywhere else code should rely * upon explicit power domain reference counting to ensure that the hardware * block is powered up before accessing it. * * Callers must hold the relevant modesetting locks to ensure that concurrent * threads can't disable the power well while the caller tries to read a few * registers. * * Returns: * True when the power domain is enabled, false otherwise. */ bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains; bool ret; power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); ret = __intel_display_power_is_enabled(dev_priv, domain); mutex_unlock(&power_domains->lock); return ret; } /** * intel_display_set_init_power - set the initial power domain state * @dev_priv: i915 device instance * @enable: whether to enable or disable the initial power domain state * * For simplicity our driver load/unload and system suspend/resume code assumes * that all power domains are always enabled. This functions controls the state * of this little hack. While the initial power domain state is enabled runtime * pm is effectively disabled. */ void intel_display_set_init_power(struct drm_i915_private *dev_priv, bool enable) { if (dev_priv->power_domains.init_power_on == enable) return; if (enable) intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); else intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); dev_priv->power_domains.init_power_on = enable; } /* * Starting with Haswell, we have a "Power Down Well" that can be turned off * when not needed anymore. We have 4 registers that can request the power well * to be enabled, and it will only be disabled if none of the registers is * requesting it to be enabled. */ static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; /* * After we re-enable the power well, if we touch VGA register 0x3d5 * we'll get unclaimed register interrupts. This stops after we write * anything to the VGA MSR register. The vgacon module uses this * register all the time, so if we unbind our driver and, as a * consequence, bind vgacon, we'll get stuck in an infinite loop at * console_unlock(). So make here we touch the VGA MSR register, making * sure vgacon can keep working normally without triggering interrupts * and error messages. */ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); vga_put(pdev, VGA_RSRC_LEGACY_IO); if (IS_BROADWELL(dev_priv)) gen8_irq_power_well_post_enable(dev_priv, 1 << PIPE_C | 1 << PIPE_B); } static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv) { if (IS_BROADWELL(dev_priv)) gen8_irq_power_well_pre_disable(dev_priv, 1 << PIPE_C | 1 << PIPE_B); } static void skl_power_well_post_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { struct pci_dev *pdev = dev_priv->drm.pdev; /* * After we re-enable the power well, if we touch VGA register 0x3d5 * we'll get unclaimed register interrupts. This stops after we write * anything to the VGA MSR register. The vgacon module uses this * register all the time, so if we unbind our driver and, as a * consequence, bind vgacon, we'll get stuck in an infinite loop at * console_unlock(). So make here we touch the VGA MSR register, making * sure vgacon can keep working normally without triggering interrupts * and error messages. */ if (power_well->data == SKL_DISP_PW_2) { vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); vga_put(pdev, VGA_RSRC_LEGACY_IO); gen8_irq_power_well_post_enable(dev_priv, 1 << PIPE_C | 1 << PIPE_B); } } static void skl_power_well_pre_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { if (power_well->data == SKL_DISP_PW_2) gen8_irq_power_well_pre_disable(dev_priv, 1 << PIPE_C | 1 << PIPE_B); } static void hsw_set_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { bool is_enabled, enable_requested; uint32_t tmp; tmp = I915_READ(HSW_PWR_WELL_DRIVER); is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; if (enable) { if (!enable_requested) I915_WRITE(HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_ENABLE_REQUEST); if (!is_enabled) { DRM_DEBUG_KMS("Enabling power well\n"); if (intel_wait_for_register(dev_priv, HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_STATE_ENABLED, HSW_PWR_WELL_STATE_ENABLED, 20)) DRM_ERROR("Timeout enabling power well\n"); hsw_power_well_post_enable(dev_priv); } } else { if (enable_requested) { hsw_power_well_pre_disable(dev_priv); I915_WRITE(HSW_PWR_WELL_DRIVER, 0); POSTING_READ(HSW_PWR_WELL_DRIVER); DRM_DEBUG_KMS("Requesting to disable the power well\n"); } } } #define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_PIPE_C) | \ BIT(POWER_DOMAIN_TRANSCODER_C) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_E_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_AUX_D) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_INIT)) #define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_A_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_E_LANES) | \ BIT(POWER_DOMAIN_INIT)) #define SKL_DISPLAY_DDI_B_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_INIT)) #define SKL_DISPLAY_DDI_C_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_INIT)) #define SKL_DISPLAY_DDI_D_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_INIT)) #define SKL_DISPLAY_DC_OFF_POWER_DOMAINS ( \ SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ BIT(POWER_DOMAIN_MODESET) | \ BIT(POWER_DOMAIN_AUX_A) | \ BIT(POWER_DOMAIN_INIT)) #define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_PIPE_C) | \ BIT(POWER_DOMAIN_TRANSCODER_C) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_GMBUS) | \ BIT(POWER_DOMAIN_INIT)) #define BXT_DISPLAY_DC_OFF_POWER_DOMAINS ( \ BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ BIT(POWER_DOMAIN_MODESET) | \ BIT(POWER_DOMAIN_AUX_A) | \ BIT(POWER_DOMAIN_INIT)) #define BXT_DPIO_CMN_A_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_A_LANES) | \ BIT(POWER_DOMAIN_AUX_A) | \ BIT(POWER_DOMAIN_INIT)) #define BXT_DPIO_CMN_BC_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_INIT)) static void assert_can_enable_dc9(struct drm_i915_private *dev_priv) { WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), "DC9 already programmed to be enabled.\n"); WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, "DC5 still not disabled to enable DC9.\n"); WARN_ONCE(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on.\n"); WARN_ONCE(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); /* * TODO: check for the following to verify the conditions to enter DC9 * state are satisfied: * 1] Check relevant display engine registers to verify if mode set * disable sequence was followed. * 2] Check if display uninitialize sequence is initialized. */ } static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) { WARN_ONCE(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, "DC5 still not disabled.\n"); /* * TODO: check for the following to verify DC9 state was indeed * entered before programming to disable it: * 1] Check relevant display engine registers to verify if mode * set disable sequence was followed. * 2] Check if display uninitialize sequence is initialized. */ } static void gen9_write_dc_state(struct drm_i915_private *dev_priv, u32 state) { int rewrites = 0; int rereads = 0; u32 v; I915_WRITE(DC_STATE_EN, state); /* It has been observed that disabling the dc6 state sometimes * doesn't stick and dmc keeps returning old value. Make sure * the write really sticks enough times and also force rewrite until * we are confident that state is exactly what we want. */ do { v = I915_READ(DC_STATE_EN); if (v != state) { I915_WRITE(DC_STATE_EN, state); rewrites++; rereads = 0; } else if (rereads++ > 5) { break; } } while (rewrites < 100); if (v != state) DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n", state, v); /* Most of the times we need one retry, avoid spam */ if (rewrites > 1) DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n", state, rewrites); } static u32 gen9_dc_mask(struct drm_i915_private *dev_priv) { u32 mask; mask = DC_STATE_EN_UPTO_DC5; if (IS_BROXTON(dev_priv)) mask |= DC_STATE_EN_DC9; else mask |= DC_STATE_EN_UPTO_DC6; return mask; } void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv) { u32 val; val = I915_READ(DC_STATE_EN) & gen9_dc_mask(dev_priv); DRM_DEBUG_KMS("Resetting DC state tracking from %02x to %02x\n", dev_priv->csr.dc_state, val); dev_priv->csr.dc_state = val; } static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state) { uint32_t val; uint32_t mask; if (WARN_ON_ONCE(state & ~dev_priv->csr.allowed_dc_mask)) state &= dev_priv->csr.allowed_dc_mask; val = I915_READ(DC_STATE_EN); mask = gen9_dc_mask(dev_priv); DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n", val & mask, state); /* Check if DMC is ignoring our DC state requests */ if ((val & mask) != dev_priv->csr.dc_state) DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n", dev_priv->csr.dc_state, val & mask); val &= ~mask; val |= state; gen9_write_dc_state(dev_priv, val); dev_priv->csr.dc_state = val & mask; } void bxt_enable_dc9(struct drm_i915_private *dev_priv) { assert_can_enable_dc9(dev_priv); DRM_DEBUG_KMS("Enabling DC9\n"); intel_power_sequencer_reset(dev_priv); gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9); } void bxt_disable_dc9(struct drm_i915_private *dev_priv) { assert_can_disable_dc9(dev_priv); DRM_DEBUG_KMS("Disabling DC9\n"); gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); intel_pps_unlock_regs_wa(dev_priv); } static void assert_csr_loaded(struct drm_i915_private *dev_priv) { WARN_ONCE(!I915_READ(CSR_PROGRAM(0)), "CSR program storage start is NULL\n"); WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n"); WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n"); } static void assert_can_enable_dc5(struct drm_i915_private *dev_priv) { bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, SKL_DISP_PW_2); WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n"); WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5), "DC5 already programmed to be enabled.\n"); assert_rpm_wakelock_held(dev_priv); assert_csr_loaded(dev_priv); } void gen9_enable_dc5(struct drm_i915_private *dev_priv) { assert_can_enable_dc5(dev_priv); DRM_DEBUG_KMS("Enabling DC5\n"); gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5); } static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) { WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE, "Backlight is not disabled.\n"); WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), "DC6 already programmed to be enabled.\n"); assert_csr_loaded(dev_priv); } void skl_enable_dc6(struct drm_i915_private *dev_priv) { assert_can_enable_dc6(dev_priv); DRM_DEBUG_KMS("Enabling DC6\n"); gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6); } void skl_disable_dc6(struct drm_i915_private *dev_priv) { DRM_DEBUG_KMS("Disabling DC6\n"); gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); } static void gen9_sanitize_power_well_requests(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum skl_disp_power_wells power_well_id = power_well->data; u32 val; u32 mask; mask = SKL_POWER_WELL_REQ(power_well_id); val = I915_READ(HSW_PWR_WELL_KVMR); if (WARN_ONCE(val & mask, "Clearing unexpected KVMR request for %s\n", power_well->name)) I915_WRITE(HSW_PWR_WELL_KVMR, val & ~mask); val = I915_READ(HSW_PWR_WELL_BIOS); val |= I915_READ(HSW_PWR_WELL_DEBUG); if (!(val & mask)) return; /* * DMC is known to force on the request bits for power well 1 on SKL * and BXT and the misc IO power well on SKL but we don't expect any * other request bits to be set, so WARN for those. */ if (power_well_id == SKL_DISP_PW_1 || ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) && power_well_id == SKL_DISP_PW_MISC_IO)) DRM_DEBUG_DRIVER("Clearing auxiliary requests for %s forced on " "by DMC\n", power_well->name); else WARN_ONCE(1, "Clearing unexpected auxiliary requests for %s\n", power_well->name); I915_WRITE(HSW_PWR_WELL_BIOS, val & ~mask); I915_WRITE(HSW_PWR_WELL_DEBUG, val & ~mask); } static void skl_set_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { uint32_t tmp, fuse_status; uint32_t req_mask, state_mask; bool is_enabled, enable_requested, check_fuse_status = false; tmp = I915_READ(HSW_PWR_WELL_DRIVER); fuse_status = I915_READ(SKL_FUSE_STATUS); switch (power_well->data) { case SKL_DISP_PW_1: if (intel_wait_for_register(dev_priv, SKL_FUSE_STATUS, SKL_FUSE_PG0_DIST_STATUS, SKL_FUSE_PG0_DIST_STATUS, 1)) { DRM_ERROR("PG0 not enabled\n"); return; } break; case SKL_DISP_PW_2: if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) { DRM_ERROR("PG1 in disabled state\n"); return; } break; case SKL_DISP_PW_DDI_A_E: case SKL_DISP_PW_DDI_B: case SKL_DISP_PW_DDI_C: case SKL_DISP_PW_DDI_D: case SKL_DISP_PW_MISC_IO: break; default: WARN(1, "Unknown power well %lu\n", power_well->data); return; } req_mask = SKL_POWER_WELL_REQ(power_well->data); enable_requested = tmp & req_mask; state_mask = SKL_POWER_WELL_STATE(power_well->data); is_enabled = tmp & state_mask; if (!enable && enable_requested) skl_power_well_pre_disable(dev_priv, power_well); if (enable) { if (!enable_requested) { WARN((tmp & state_mask) && !I915_READ(HSW_PWR_WELL_BIOS), "Invalid for power well status to be enabled, unless done by the BIOS, \ when request is to disable!\n"); I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask); } if (!is_enabled) { DRM_DEBUG_KMS("Enabling %s\n", power_well->name); check_fuse_status = true; } } else { if (enable_requested) { I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask); POSTING_READ(HSW_PWR_WELL_DRIVER); DRM_DEBUG_KMS("Disabling %s\n", power_well->name); } if (IS_GEN9(dev_priv)) gen9_sanitize_power_well_requests(dev_priv, power_well); } if (wait_for(!!(I915_READ(HSW_PWR_WELL_DRIVER) & state_mask) == enable, 1)) DRM_ERROR("%s %s timeout\n", power_well->name, enable ? "enable" : "disable"); if (check_fuse_status) { if (power_well->data == SKL_DISP_PW_1) { if (intel_wait_for_register(dev_priv, SKL_FUSE_STATUS, SKL_FUSE_PG1_DIST_STATUS, SKL_FUSE_PG1_DIST_STATUS, 1)) DRM_ERROR("PG1 distributing status timeout\n"); } else if (power_well->data == SKL_DISP_PW_2) { if (intel_wait_for_register(dev_priv, SKL_FUSE_STATUS, SKL_FUSE_PG2_DIST_STATUS, SKL_FUSE_PG2_DIST_STATUS, 1)) DRM_ERROR("PG2 distributing status timeout\n"); } } if (enable && !is_enabled) skl_power_well_post_enable(dev_priv, power_well); } static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { hsw_set_power_well(dev_priv, power_well, power_well->count > 0); /* * We're taking over the BIOS, so clear any requests made by it since * the driver is in charge now. */ if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) I915_WRITE(HSW_PWR_WELL_BIOS, 0); } static void hsw_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { hsw_set_power_well(dev_priv, power_well, true); } static void hsw_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { hsw_set_power_well(dev_priv, power_well, false); } static bool skl_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { uint32_t mask = SKL_POWER_WELL_REQ(power_well->data) | SKL_POWER_WELL_STATE(power_well->data); return (I915_READ(HSW_PWR_WELL_DRIVER) & mask) == mask; } static void skl_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { skl_set_power_well(dev_priv, power_well, power_well->count > 0); /* Clear any request made by BIOS as driver is taking over */ I915_WRITE(HSW_PWR_WELL_BIOS, 0); } static void skl_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { skl_set_power_well(dev_priv, power_well, true); } static void skl_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { skl_set_power_well(dev_priv, power_well, false); } static enum dpio_phy bxt_power_well_to_phy(struct i915_power_well *power_well) { enum skl_disp_power_wells power_well_id = power_well->data; return power_well_id == BXT_DPIO_CMN_A ? DPIO_PHY1 : DPIO_PHY0; } static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum skl_disp_power_wells power_well_id = power_well->data; struct i915_power_well *cmn_a_well = NULL; if (power_well_id == BXT_DPIO_CMN_BC) { /* * We need to copy the GRC calibration value from the eDP PHY, * so make sure it's powered up. */ cmn_a_well = lookup_power_well(dev_priv, BXT_DPIO_CMN_A); intel_power_well_get(dev_priv, cmn_a_well); } bxt_ddi_phy_init(dev_priv, bxt_power_well_to_phy(power_well)); if (cmn_a_well) intel_power_well_put(dev_priv, cmn_a_well); } static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { bxt_ddi_phy_uninit(dev_priv, bxt_power_well_to_phy(power_well)); } static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { return bxt_ddi_phy_is_enabled(dev_priv, bxt_power_well_to_phy(power_well)); } static void bxt_dpio_cmn_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { if (power_well->count > 0) bxt_dpio_cmn_power_well_enable(dev_priv, power_well); else bxt_dpio_cmn_power_well_disable(dev_priv, power_well); } static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv) { struct i915_power_well *power_well; power_well = lookup_power_well(dev_priv, BXT_DPIO_CMN_A); if (power_well->count > 0) bxt_ddi_phy_verify_state(dev_priv, bxt_power_well_to_phy(power_well)); power_well = lookup_power_well(dev_priv, BXT_DPIO_CMN_BC); if (power_well->count > 0) bxt_ddi_phy_verify_state(dev_priv, bxt_power_well_to_phy(power_well)); } static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0; } static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv) { u32 tmp = I915_READ(DBUF_CTL); WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) != (DBUF_POWER_STATE | DBUF_POWER_REQUEST), "Unexpected DBuf power power state (0x%08x)\n", tmp); } static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); WARN_ON(dev_priv->cdclk_freq != dev_priv->display.get_display_clock_speed(&dev_priv->drm)); gen9_assert_dbuf_enabled(dev_priv); if (IS_BROXTON(dev_priv)) bxt_verify_ddi_phy_power_wells(dev_priv); } static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { if (!dev_priv->csr.dmc_payload) return; if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6) skl_enable_dc6(dev_priv); else if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5) gen9_enable_dc5(dev_priv); } static void gen9_dc_off_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { if (power_well->count > 0) gen9_dc_off_power_well_enable(dev_priv, power_well); else gen9_dc_off_power_well_disable(dev_priv, power_well); } static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { } static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { return true; } static void vlv_set_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { enum punit_power_well power_well_id = power_well->data; u32 mask; u32 state; u32 ctrl; mask = PUNIT_PWRGT_MASK(power_well_id); state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : PUNIT_PWRGT_PWR_GATE(power_well_id); mutex_lock(&dev_priv->rps.hw_lock); #define COND \ ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) if (COND) goto out; ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); ctrl &= ~mask; ctrl |= state; vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); if (wait_for(COND, 100)) DRM_ERROR("timeout setting power well state %08x (%08x)\n", state, vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); #undef COND out: mutex_unlock(&dev_priv->rps.hw_lock); } static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { vlv_set_power_well(dev_priv, power_well, power_well->count > 0); } static void vlv_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { vlv_set_power_well(dev_priv, power_well, true); } static void vlv_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { vlv_set_power_well(dev_priv, power_well, false); } static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { int power_well_id = power_well->data; bool enabled = false; u32 mask; u32 state; u32 ctrl; mask = PUNIT_PWRGT_MASK(power_well_id); ctrl = PUNIT_PWRGT_PWR_ON(power_well_id); mutex_lock(&dev_priv->rps.hw_lock); state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; /* * We only ever set the power-on and power-gate states, anything * else is unexpected. */ WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) && state != PUNIT_PWRGT_PWR_GATE(power_well_id)); if (state == ctrl) enabled = true; /* * A transient state at this point would mean some unexpected party * is poking at the power controls too. */ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; WARN_ON(ctrl != state); mutex_unlock(&dev_priv->rps.hw_lock); return enabled; } static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv) { I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE); /* * Disable trickle feed and enable pnd deadline calculation */ I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE); I915_WRITE(CBR1_VLV, 0); WARN_ON(dev_priv->rawclk_freq == 0); I915_WRITE(RAWCLK_FREQ_VLV, DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 1000)); } static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) { struct intel_encoder *encoder; enum pipe pipe; /* * Enable the CRI clock source so we can get at the * display and the reference clock for VGA * hotplug / manual detection. Supposedly DSI also * needs the ref clock up and running. * * CHV DPLL B/C have some issues if VGA mode is enabled. */ for_each_pipe(&dev_priv->drm, pipe) { u32 val = I915_READ(DPLL(pipe)); val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; if (pipe != PIPE_A) val |= DPLL_INTEGRATED_CRI_CLK_VLV; I915_WRITE(DPLL(pipe), val); } vlv_init_display_clock_gating(dev_priv); spin_lock_irq(&dev_priv->irq_lock); valleyview_enable_display_irqs(dev_priv); spin_unlock_irq(&dev_priv->irq_lock); /* * During driver initialization/resume we can avoid restoring the * part of the HW/SW state that will be inited anyway explicitly. */ if (dev_priv->power_domains.initializing) return; intel_hpd_init(dev_priv); /* Re-enable the ADPA, if we have one */ for_each_intel_encoder(&dev_priv->drm, encoder) { if (encoder->type == INTEL_OUTPUT_ANALOG) intel_crt_reset(&encoder->base); } i915_redisable_vga_power_on(&dev_priv->drm); intel_pps_unlock_regs_wa(dev_priv); } static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) { spin_lock_irq(&dev_priv->irq_lock); valleyview_disable_display_irqs(dev_priv); spin_unlock_irq(&dev_priv->irq_lock); /* make sure we're done processing display irqs */ synchronize_irq(dev_priv->drm.irq); intel_power_sequencer_reset(dev_priv); intel_hpd_poll_init(dev_priv); } static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); vlv_set_power_well(dev_priv, power_well, true); vlv_display_power_well_init(dev_priv); } static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); vlv_display_power_well_deinit(dev_priv); vlv_set_power_well(dev_priv, power_well, false); } static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); /* since ref/cri clock was enabled */ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ vlv_set_power_well(dev_priv, power_well, true); /* * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - * 6. De-assert cmn_reset/side_reset. Same as VLV X0. * a. GUnit 0x2110 bit[0] set to 1 (def 0) * b. The other bits such as sfr settings / modesel may all * be set to 0. * * This should only be done on init and resume from S3 with * both PLLs disabled, or we risk losing DPIO and PLL * synchronization. */ I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); } static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum pipe pipe; WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); for_each_pipe(dev_priv, pipe) assert_pll_disabled(dev_priv, pipe); /* Assert common reset */ I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST); vlv_set_power_well(dev_priv, power_well, false); } #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1) static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv, int power_well_id) { struct i915_power_domains *power_domains = &dev_priv->power_domains; int i; for (i = 0; i < power_domains->power_well_count; i++) { struct i915_power_well *power_well; power_well = &power_domains->power_wells[i]; if (power_well->data == power_well_id) return power_well; } return NULL; } #define BITS_SET(val, bits) (((val) & (bits)) == (bits)) static void assert_chv_phy_status(struct drm_i915_private *dev_priv) { struct i915_power_well *cmn_bc = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); struct i915_power_well *cmn_d = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); u32 phy_control = dev_priv->chv_phy_control; u32 phy_status = 0; u32 phy_status_mask = 0xffffffff; /* * The BIOS can leave the PHY is some weird state * where it doesn't fully power down some parts. * Disable the asserts until the PHY has been fully * reset (ie. the power well has been disabled at * least once). */ if (!dev_priv->chv_phy_assert[DPIO_PHY0]) phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) | PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1)); if (!dev_priv->chv_phy_assert[DPIO_PHY1]) phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1)); if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { phy_status |= PHY_POWERGOOD(DPIO_PHY0); /* this assumes override is only used to enable lanes */ if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0) phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0); if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0) phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1); /* CL1 is on whenever anything is on in either channel */ if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1))) phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0); /* * The DPLLB check accounts for the pipe B + port A usage * with CL2 powered up but all the lanes in the second channel * powered down. */ if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) && (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0) phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1); } if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { phy_status |= PHY_POWERGOOD(DPIO_PHY1); /* this assumes override is only used to enable lanes */ if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0) phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0))) phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0); if (BITS_SET(phy_control, PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0))) phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1); } phy_status &= phy_status_mask; /* * The PHY may be busy with some initial calibration and whatnot, * so the power state can take a while to actually change. */ if (intel_wait_for_register(dev_priv, DISPLAY_PHY_STATUS, phy_status_mask, phy_status, 10)) DRM_ERROR("Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n", I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask, phy_status, dev_priv->chv_phy_control); } #undef BITS_SET static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum dpio_phy phy; enum pipe pipe; uint32_t tmp; WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { pipe = PIPE_A; phy = DPIO_PHY0; } else { pipe = PIPE_C; phy = DPIO_PHY1; } /* since ref/cri clock was enabled */ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ vlv_set_power_well(dev_priv, power_well, true); /* Poll for phypwrgood signal */ if (intel_wait_for_register(dev_priv, DISPLAY_PHY_STATUS, PHY_POWERGOOD(phy), PHY_POWERGOOD(phy), 1)) DRM_ERROR("Display PHY %d is not power up\n", phy); mutex_lock(&dev_priv->sb_lock); /* Enable dynamic power down */ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28); tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp); if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1); tmp |= DPIO_DYNPWRDOWNEN_CH1; vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp); } else { /* * Force the non-existing CL2 off. BXT does this * too, so maybe it saves some power even though * CL2 doesn't exist? */ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); tmp |= DPIO_CL2_LDOFUSE_PWRENB; vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp); } mutex_unlock(&dev_priv->sb_lock); dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy); I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", phy, dev_priv->chv_phy_control); assert_chv_phy_status(dev_priv); } static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum dpio_phy phy; WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { phy = DPIO_PHY0; assert_pll_disabled(dev_priv, PIPE_A); assert_pll_disabled(dev_priv, PIPE_B); } else { phy = DPIO_PHY1; assert_pll_disabled(dev_priv, PIPE_C); } dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy); I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); vlv_set_power_well(dev_priv, power_well, false); DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", phy, dev_priv->chv_phy_control); /* PHY is fully reset now, so we can enable the PHY state asserts */ dev_priv->chv_phy_assert[phy] = true; assert_chv_phy_status(dev_priv); } static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy, enum dpio_channel ch, bool override, unsigned int mask) { enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C; u32 reg, val, expected, actual; /* * The BIOS can leave the PHY is some weird state * where it doesn't fully power down some parts. * Disable the asserts until the PHY has been fully * reset (ie. the power well has been disabled at * least once). */ if (!dev_priv->chv_phy_assert[phy]) return; if (ch == DPIO_CH0) reg = _CHV_CMN_DW0_CH0; else reg = _CHV_CMN_DW6_CH1; mutex_lock(&dev_priv->sb_lock); val = vlv_dpio_read(dev_priv, pipe, reg); mutex_unlock(&dev_priv->sb_lock); /* * This assumes !override is only used when the port is disabled. * All lanes should power down even without the override when * the port is disabled. */ if (!override || mask == 0xf) { expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; /* * If CH1 common lane is not active anymore * (eg. for pipe B DPLL) the entire channel will * shut down, which causes the common lane registers * to read as 0. That means we can't actually check * the lane power down status bits, but as the entire * register reads as 0 it's a good indication that the * channel is indeed entirely powered down. */ if (ch == DPIO_CH1 && val == 0) expected = 0; } else if (mask != 0x0) { expected = DPIO_ANYDL_POWERDOWN; } else { expected = 0; } if (ch == DPIO_CH0) actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0; else actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1; actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; WARN(actual != expected, "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n", !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN), !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN), reg, val); } bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy, enum dpio_channel ch, bool override) { struct i915_power_domains *power_domains = &dev_priv->power_domains; bool was_override; mutex_lock(&power_domains->lock); was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); if (override == was_override) goto out; if (override) dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); else dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n", phy, ch, dev_priv->chv_phy_control); assert_chv_phy_status(dev_priv); out: mutex_unlock(&power_domains->lock); return was_override; } void chv_phy_powergate_lanes(struct intel_encoder *encoder, bool override, unsigned int mask) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct i915_power_domains *power_domains = &dev_priv->power_domains; enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base)); enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); mutex_lock(&power_domains->lock); dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch); dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch); if (override) dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); else dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n", phy, ch, mask, dev_priv->chv_phy_control); assert_chv_phy_status(dev_priv); assert_chv_phy_powergate(dev_priv, phy, ch, override, mask); mutex_unlock(&power_domains->lock); } static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { enum pipe pipe = power_well->data; bool enabled; u32 state, ctrl; mutex_lock(&dev_priv->rps.hw_lock); state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe); /* * We only ever set the power-on and power-gate states, anything * else is unexpected. */ WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe)); enabled = state == DP_SSS_PWR_ON(pipe); /* * A transient state at this point would mean some unexpected party * is poking at the power controls too. */ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe); WARN_ON(ctrl << 16 != state); mutex_unlock(&dev_priv->rps.hw_lock); return enabled; } static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, struct i915_power_well *power_well, bool enable) { enum pipe pipe = power_well->data; u32 state; u32 ctrl; state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); mutex_lock(&dev_priv->rps.hw_lock); #define COND \ ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) if (COND) goto out; ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); ctrl &= ~DP_SSC_MASK(pipe); ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); if (wait_for(COND, 100)) DRM_ERROR("timeout setting power well state %08x (%08x)\n", state, vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); #undef COND out: mutex_unlock(&dev_priv->rps.hw_lock); } static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PIPE_A); chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0); } static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PIPE_A); chv_set_pipe_power_well(dev_priv, power_well, true); vlv_display_power_well_init(dev_priv); } static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { WARN_ON_ONCE(power_well->data != PIPE_A); vlv_display_power_well_deinit(dev_priv); chv_set_pipe_power_well(dev_priv, power_well, false); } static void __intel_display_power_get_domain(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *power_well; int i; for_each_power_well(i, power_well, BIT(domain), power_domains) intel_power_well_get(dev_priv, power_well); power_domains->domain_use_count[domain]++; } /** * intel_display_power_get - grab a power domain reference * @dev_priv: i915 device instance * @domain: power domain to reference * * This function grabs a power domain reference for @domain and ensures that the * power domain and all its parents are powered up. Therefore users should only * grab a reference to the innermost power domain they need. * * Any power domain reference obtained by this function must have a symmetric * call to intel_display_power_put() to release the reference again. */ void intel_display_power_get(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains = &dev_priv->power_domains; intel_runtime_pm_get(dev_priv); mutex_lock(&power_domains->lock); __intel_display_power_get_domain(dev_priv, domain); mutex_unlock(&power_domains->lock); } /** * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain * @dev_priv: i915 device instance * @domain: power domain to reference * * This function grabs a power domain reference for @domain and ensures that the * power domain and all its parents are powered up. Therefore users should only * grab a reference to the innermost power domain they need. * * Any power domain reference obtained by this function must have a symmetric * call to intel_display_power_put() to release the reference again. */ bool intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains = &dev_priv->power_domains; bool is_enabled; if (!intel_runtime_pm_get_if_in_use(dev_priv)) return false; mutex_lock(&power_domains->lock); if (__intel_display_power_is_enabled(dev_priv, domain)) { __intel_display_power_get_domain(dev_priv, domain); is_enabled = true; } else { is_enabled = false; } mutex_unlock(&power_domains->lock); if (!is_enabled) intel_runtime_pm_put(dev_priv); return is_enabled; } /** * intel_display_power_put - release a power domain reference * @dev_priv: i915 device instance * @domain: power domain to reference * * This function drops the power domain reference obtained by * intel_display_power_get() and might power down the corresponding hardware * block right away if this is the last reference. */ void intel_display_power_put(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain) { struct i915_power_domains *power_domains; struct i915_power_well *power_well; int i; power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); WARN(!power_domains->domain_use_count[domain], "Use count on domain %s is already zero\n", intel_display_power_domain_str(domain)); power_domains->domain_use_count[domain]--; for_each_power_well_rev(i, power_well, BIT(domain), power_domains) intel_power_well_put(dev_priv, power_well); mutex_unlock(&power_domains->lock); intel_runtime_pm_put(dev_priv); } #define HSW_DISPLAY_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_PIPE_C) | \ BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_TRANSCODER_C) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_INIT)) #define BDW_DISPLAY_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_PIPE_C) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_TRANSCODER_C) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DISPLAY_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PIPE_A) | \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_DSI) | \ BIT(POWER_DOMAIN_PORT_CRT) | \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_GMBUS) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_CRT) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_INIT)) #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_INIT)) #define CHV_DISPLAY_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PIPE_A) | \ BIT(POWER_DOMAIN_PIPE_B) | \ BIT(POWER_DOMAIN_PIPE_C) | \ BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ BIT(POWER_DOMAIN_TRANSCODER_A) | \ BIT(POWER_DOMAIN_TRANSCODER_B) | \ BIT(POWER_DOMAIN_TRANSCODER_C) | \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_PORT_DSI) | \ BIT(POWER_DOMAIN_VGA) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_AUX_D) | \ BIT(POWER_DOMAIN_GMBUS) | \ BIT(POWER_DOMAIN_INIT)) #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_INIT)) #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \ BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ BIT(POWER_DOMAIN_AUX_D) | \ BIT(POWER_DOMAIN_INIT)) static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { .sync_hw = i9xx_always_on_power_well_noop, .enable = i9xx_always_on_power_well_noop, .disable = i9xx_always_on_power_well_noop, .is_enabled = i9xx_always_on_power_well_enabled, }; static const struct i915_power_well_ops chv_pipe_power_well_ops = { .sync_hw = chv_pipe_power_well_sync_hw, .enable = chv_pipe_power_well_enable, .disable = chv_pipe_power_well_disable, .is_enabled = chv_pipe_power_well_enabled, }; static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { .sync_hw = vlv_power_well_sync_hw, .enable = chv_dpio_cmn_power_well_enable, .disable = chv_dpio_cmn_power_well_disable, .is_enabled = vlv_power_well_enabled, }; static struct i915_power_well i9xx_always_on_power_well[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, }, }; static const struct i915_power_well_ops hsw_power_well_ops = { .sync_hw = hsw_power_well_sync_hw, .enable = hsw_power_well_enable, .disable = hsw_power_well_disable, .is_enabled = hsw_power_well_enabled, }; static const struct i915_power_well_ops skl_power_well_ops = { .sync_hw = skl_power_well_sync_hw, .enable = skl_power_well_enable, .disable = skl_power_well_disable, .is_enabled = skl_power_well_enabled, }; static const struct i915_power_well_ops gen9_dc_off_power_well_ops = { .sync_hw = gen9_dc_off_power_well_sync_hw, .enable = gen9_dc_off_power_well_enable, .disable = gen9_dc_off_power_well_disable, .is_enabled = gen9_dc_off_power_well_enabled, }; static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = { .sync_hw = bxt_dpio_cmn_power_well_sync_hw, .enable = bxt_dpio_cmn_power_well_enable, .disable = bxt_dpio_cmn_power_well_disable, .is_enabled = bxt_dpio_cmn_power_well_enabled, }; static struct i915_power_well hsw_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, }, { .name = "display", .domains = HSW_DISPLAY_POWER_DOMAINS, .ops = &hsw_power_well_ops, }, }; static struct i915_power_well bdw_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, }, { .name = "display", .domains = BDW_DISPLAY_POWER_DOMAINS, .ops = &hsw_power_well_ops, }, }; static const struct i915_power_well_ops vlv_display_power_well_ops = { .sync_hw = vlv_power_well_sync_hw, .enable = vlv_display_power_well_enable, .disable = vlv_display_power_well_disable, .is_enabled = vlv_power_well_enabled, }; static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { .sync_hw = vlv_power_well_sync_hw, .enable = vlv_dpio_cmn_power_well_enable, .disable = vlv_dpio_cmn_power_well_disable, .is_enabled = vlv_power_well_enabled, }; static const struct i915_power_well_ops vlv_dpio_power_well_ops = { .sync_hw = vlv_power_well_sync_hw, .enable = vlv_power_well_enable, .disable = vlv_power_well_disable, .is_enabled = vlv_power_well_enabled, }; static struct i915_power_well vlv_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, .data = PUNIT_POWER_WELL_ALWAYS_ON, }, { .name = "display", .domains = VLV_DISPLAY_POWER_DOMAINS, .data = PUNIT_POWER_WELL_DISP2D, .ops = &vlv_display_power_well_ops, }, { .name = "dpio-tx-b-01", .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, .ops = &vlv_dpio_power_well_ops, .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, }, { .name = "dpio-tx-b-23", .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, .ops = &vlv_dpio_power_well_ops, .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, }, { .name = "dpio-tx-c-01", .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, .ops = &vlv_dpio_power_well_ops, .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, }, { .name = "dpio-tx-c-23", .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, .ops = &vlv_dpio_power_well_ops, .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, }, { .name = "dpio-common", .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS, .data = PUNIT_POWER_WELL_DPIO_CMN_BC, .ops = &vlv_dpio_cmn_power_well_ops, }, }; static struct i915_power_well chv_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, }, { .name = "display", /* * Pipe A power well is the new disp2d well. Pipe B and C * power wells don't actually exist. Pipe A power well is * required for any pipe to work. */ .domains = CHV_DISPLAY_POWER_DOMAINS, .data = PIPE_A, .ops = &chv_pipe_power_well_ops, }, { .name = "dpio-common-bc", .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS, .data = PUNIT_POWER_WELL_DPIO_CMN_BC, .ops = &chv_dpio_cmn_power_well_ops, }, { .name = "dpio-common-d", .domains = CHV_DPIO_CMN_D_POWER_DOMAINS, .data = PUNIT_POWER_WELL_DPIO_CMN_D, .ops = &chv_dpio_cmn_power_well_ops, }, }; bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, int power_well_id) { struct i915_power_well *power_well; bool ret; power_well = lookup_power_well(dev_priv, power_well_id); ret = power_well->ops->is_enabled(dev_priv, power_well); return ret; } static struct i915_power_well skl_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, .data = SKL_DISP_PW_ALWAYS_ON, }, { .name = "power well 1", /* Handled by the DMC firmware */ .domains = 0, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_1, }, { .name = "MISC IO power well", /* Handled by the DMC firmware */ .domains = 0, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_MISC_IO, }, { .name = "DC off", .domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS, .ops = &gen9_dc_off_power_well_ops, .data = SKL_DISP_PW_DC_OFF, }, { .name = "power well 2", .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_2, }, { .name = "DDI A/E power well", .domains = SKL_DISPLAY_DDI_A_E_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_DDI_A_E, }, { .name = "DDI B power well", .domains = SKL_DISPLAY_DDI_B_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_DDI_B, }, { .name = "DDI C power well", .domains = SKL_DISPLAY_DDI_C_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_DDI_C, }, { .name = "DDI D power well", .domains = SKL_DISPLAY_DDI_D_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_DDI_D, }, }; static struct i915_power_well bxt_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, .ops = &i9xx_always_on_power_well_ops, }, { .name = "power well 1", .domains = 0, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_1, }, { .name = "DC off", .domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS, .ops = &gen9_dc_off_power_well_ops, .data = SKL_DISP_PW_DC_OFF, }, { .name = "power well 2", .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS, .ops = &skl_power_well_ops, .data = SKL_DISP_PW_2, }, { .name = "dpio-common-a", .domains = BXT_DPIO_CMN_A_POWER_DOMAINS, .ops = &bxt_dpio_cmn_power_well_ops, .data = BXT_DPIO_CMN_A, }, { .name = "dpio-common-bc", .domains = BXT_DPIO_CMN_BC_POWER_DOMAINS, .ops = &bxt_dpio_cmn_power_well_ops, .data = BXT_DPIO_CMN_BC, }, }; static int sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv, int disable_power_well) { if (disable_power_well >= 0) return !!disable_power_well; return 1; } static uint32_t get_allowed_dc_mask(const struct drm_i915_private *dev_priv, int enable_dc) { uint32_t mask; int requested_dc; int max_dc; if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) { max_dc = 2; mask = 0; } else if (IS_BROXTON(dev_priv)) { max_dc = 1; /* * DC9 has a separate HW flow from the rest of the DC states, * not depending on the DMC firmware. It's needed by system * suspend/resume, so allow it unconditionally. */ mask = DC_STATE_EN_DC9; } else { max_dc = 0; mask = 0; } if (!i915.disable_power_well) max_dc = 0; if (enable_dc >= 0 && enable_dc <= max_dc) { requested_dc = enable_dc; } else if (enable_dc == -1) { requested_dc = max_dc; } else if (enable_dc > max_dc && enable_dc <= 2) { DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n", enable_dc, max_dc); requested_dc = max_dc; } else { DRM_ERROR("Unexpected value for enable_dc (%d)\n", enable_dc); requested_dc = max_dc; } if (requested_dc > 1) mask |= DC_STATE_EN_UPTO_DC6; if (requested_dc > 0) mask |= DC_STATE_EN_UPTO_DC5; DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask); return mask; } #define set_power_wells(power_domains, __power_wells) ({ \ (power_domains)->power_wells = (__power_wells); \ (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ }) /** * intel_power_domains_init - initializes the power domain structures * @dev_priv: i915 device instance * * Initializes the power domain structures for @dev_priv depending upon the * supported platform. */ int intel_power_domains_init(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; i915.disable_power_well = sanitize_disable_power_well_option(dev_priv, i915.disable_power_well); dev_priv->csr.allowed_dc_mask = get_allowed_dc_mask(dev_priv, i915.enable_dc); BUILD_BUG_ON(POWER_DOMAIN_NUM > 31); mutex_init(&power_domains->lock); /* * The enabling order will be from lower to higher indexed wells, * the disabling order is reversed. */ if (IS_HASWELL(dev_priv)) { set_power_wells(power_domains, hsw_power_wells); } else if (IS_BROADWELL(dev_priv)) { set_power_wells(power_domains, bdw_power_wells); } else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) { set_power_wells(power_domains, skl_power_wells); } else if (IS_BROXTON(dev_priv)) { set_power_wells(power_domains, bxt_power_wells); } else if (IS_CHERRYVIEW(dev_priv)) { set_power_wells(power_domains, chv_power_wells); } else if (IS_VALLEYVIEW(dev_priv)) { set_power_wells(power_domains, vlv_power_wells); } else { set_power_wells(power_domains, i9xx_always_on_power_well); } return 0; } /** * intel_power_domains_fini - finalizes the power domain structures * @dev_priv: i915 device instance * * Finalizes the power domain structures for @dev_priv depending upon the * supported platform. This function also disables runtime pm and ensures that * the device stays powered up so that the driver can be reloaded. */ void intel_power_domains_fini(struct drm_i915_private *dev_priv) { struct device *kdev = &dev_priv->drm.pdev->dev; /* * The i915.ko module is still not prepared to be loaded when * the power well is not enabled, so just enable it in case * we're going to unload/reload. * The following also reacquires the RPM reference the core passed * to the driver during loading, which is dropped in * intel_runtime_pm_enable(). We have to hand back the control of the * device to the core with this reference held. */ intel_display_set_init_power(dev_priv, true); /* Remove the refcount we took to keep power well support disabled. */ if (!i915.disable_power_well) intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); /* * Remove the refcount we took in intel_runtime_pm_enable() in case * the platform doesn't support runtime PM. */ if (!HAS_RUNTIME_PM(dev_priv)) pm_runtime_put(kdev); } static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *power_well; int i; mutex_lock(&power_domains->lock); for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { power_well->ops->sync_hw(dev_priv, power_well); power_well->hw_enabled = power_well->ops->is_enabled(dev_priv, power_well); } mutex_unlock(&power_domains->lock); } static void gen9_dbuf_enable(struct drm_i915_private *dev_priv) { I915_WRITE(DBUF_CTL, I915_READ(DBUF_CTL) | DBUF_POWER_REQUEST); POSTING_READ(DBUF_CTL); udelay(10); if (!(I915_READ(DBUF_CTL) & DBUF_POWER_STATE)) DRM_ERROR("DBuf power enable timeout\n"); } static void gen9_dbuf_disable(struct drm_i915_private *dev_priv) { I915_WRITE(DBUF_CTL, I915_READ(DBUF_CTL) & ~DBUF_POWER_REQUEST); POSTING_READ(DBUF_CTL); udelay(10); if (I915_READ(DBUF_CTL) & DBUF_POWER_STATE) DRM_ERROR("DBuf power disable timeout!\n"); } static void skl_display_core_init(struct drm_i915_private *dev_priv, bool resume) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; uint32_t val; gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); /* enable PCH reset handshake */ val = I915_READ(HSW_NDE_RSTWRN_OPT); I915_WRITE(HSW_NDE_RSTWRN_OPT, val | RESET_PCH_HANDSHAKE_ENABLE); /* enable PG1 and Misc I/O */ mutex_lock(&power_domains->lock); well = lookup_power_well(dev_priv, SKL_DISP_PW_1); intel_power_well_enable(dev_priv, well); well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO); intel_power_well_enable(dev_priv, well); mutex_unlock(&power_domains->lock); skl_init_cdclk(dev_priv); gen9_dbuf_enable(dev_priv); if (resume && dev_priv->csr.dmc_payload) intel_csr_load_program(dev_priv); } static void skl_display_core_uninit(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); gen9_dbuf_disable(dev_priv); skl_uninit_cdclk(dev_priv); /* The spec doesn't call for removing the reset handshake flag */ /* disable PG1 and Misc I/O */ mutex_lock(&power_domains->lock); well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO); intel_power_well_disable(dev_priv, well); well = lookup_power_well(dev_priv, SKL_DISP_PW_1); intel_power_well_disable(dev_priv, well); mutex_unlock(&power_domains->lock); } void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; uint32_t val; gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); /* * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT * or else the reset will hang because there is no PCH to respond. * Move the handshake programming to initialization sequence. * Previously was left up to BIOS. */ val = I915_READ(HSW_NDE_RSTWRN_OPT); val &= ~RESET_PCH_HANDSHAKE_ENABLE; I915_WRITE(HSW_NDE_RSTWRN_OPT, val); /* Enable PG1 */ mutex_lock(&power_domains->lock); well = lookup_power_well(dev_priv, SKL_DISP_PW_1); intel_power_well_enable(dev_priv, well); mutex_unlock(&power_domains->lock); bxt_init_cdclk(dev_priv); gen9_dbuf_enable(dev_priv); if (resume && dev_priv->csr.dmc_payload) intel_csr_load_program(dev_priv); } void bxt_display_core_uninit(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *well; gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); gen9_dbuf_disable(dev_priv); bxt_uninit_cdclk(dev_priv); /* The spec doesn't call for removing the reset handshake flag */ /* Disable PG1 */ mutex_lock(&power_domains->lock); well = lookup_power_well(dev_priv, SKL_DISP_PW_1); intel_power_well_disable(dev_priv, well); mutex_unlock(&power_domains->lock); } static void chv_phy_control_init(struct drm_i915_private *dev_priv) { struct i915_power_well *cmn_bc = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); struct i915_power_well *cmn_d = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); /* * DISPLAY_PHY_CONTROL can get corrupted if read. As a * workaround never ever read DISPLAY_PHY_CONTROL, and * instead maintain a shadow copy ourselves. Use the actual * power well state and lane status to reconstruct the * expected initial value. */ dev_priv->chv_phy_control = PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0); /* * If all lanes are disabled we leave the override disabled * with all power down bits cleared to match the state we * would use after disabling the port. Otherwise enable the * override and set the lane powerdown bits accding to the * current lane status. */ if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { uint32_t status = I915_READ(DPLL(PIPE_A)); unsigned int mask; mask = status & DPLL_PORTB_READY_MASK; if (mask == 0xf) mask = 0x0; else dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0); dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0); mask = (status & DPLL_PORTC_READY_MASK) >> 4; if (mask == 0xf) mask = 0x0; else dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1); dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1); dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0); dev_priv->chv_phy_assert[DPIO_PHY0] = false; } else { dev_priv->chv_phy_assert[DPIO_PHY0] = true; } if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { uint32_t status = I915_READ(DPIO_PHY_STATUS); unsigned int mask; mask = status & DPLL_PORTD_READY_MASK; if (mask == 0xf) mask = 0x0; else dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0); dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0); dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1); dev_priv->chv_phy_assert[DPIO_PHY1] = false; } else { dev_priv->chv_phy_assert[DPIO_PHY1] = true; } I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n", dev_priv->chv_phy_control); } static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) { struct i915_power_well *cmn = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); struct i915_power_well *disp2d = lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D); /* If the display might be already active skip this */ if (cmn->ops->is_enabled(dev_priv, cmn) && disp2d->ops->is_enabled(dev_priv, disp2d) && I915_READ(DPIO_CTL) & DPIO_CMNRST) return; DRM_DEBUG_KMS("toggling display PHY side reset\n"); /* cmnlane needs DPLL registers */ disp2d->ops->enable(dev_priv, disp2d); /* * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx: * Need to assert and de-assert PHY SB reset by gating the * common lane power, then un-gating it. * Simply ungating isn't enough to reset the PHY enough to get * ports and lanes running. */ cmn->ops->disable(dev_priv, cmn); } /** * intel_power_domains_init_hw - initialize hardware power domain state * @dev_priv: i915 device instance * @resume: Called from resume code paths or not * * This function initializes the hardware power domain state and enables all * power domains using intel_display_set_init_power(). */ void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume) { struct i915_power_domains *power_domains = &dev_priv->power_domains; power_domains->initializing = true; if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) { skl_display_core_init(dev_priv, resume); } else if (IS_BROXTON(dev_priv)) { bxt_display_core_init(dev_priv, resume); } else if (IS_CHERRYVIEW(dev_priv)) { mutex_lock(&power_domains->lock); chv_phy_control_init(dev_priv); mutex_unlock(&power_domains->lock); } else if (IS_VALLEYVIEW(dev_priv)) { mutex_lock(&power_domains->lock); vlv_cmnlane_wa(dev_priv); mutex_unlock(&power_domains->lock); } /* For now, we need the power well to be always enabled. */ intel_display_set_init_power(dev_priv, true); /* Disable power support if the user asked so. */ if (!i915.disable_power_well) intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); intel_power_domains_sync_hw(dev_priv); power_domains->initializing = false; } /** * intel_power_domains_suspend - suspend power domain state * @dev_priv: i915 device instance * * This function prepares the hardware power domain state before entering * system suspend. It must be paired with intel_power_domains_init_hw(). */ void intel_power_domains_suspend(struct drm_i915_private *dev_priv) { /* * Even if power well support was disabled we still want to disable * power wells while we are system suspended. */ if (!i915.disable_power_well) intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) skl_display_core_uninit(dev_priv); else if (IS_BROXTON(dev_priv)) bxt_display_core_uninit(dev_priv); } /** * intel_runtime_pm_get - grab a runtime pm reference * @dev_priv: i915 device instance * * This function grabs a device-level runtime pm reference (mostly used for GEM * code to ensure the GTT or GT is on) and ensures that it is powered up. * * Any runtime pm reference obtained by this function must have a symmetric * call to intel_runtime_pm_put() to release the reference again. */ void intel_runtime_pm_get(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; struct device *kdev = &pdev->dev; pm_runtime_get_sync(kdev); atomic_inc(&dev_priv->pm.wakeref_count); assert_rpm_wakelock_held(dev_priv); } /** * intel_runtime_pm_get_if_in_use - grab a runtime pm reference if device in use * @dev_priv: i915 device instance * * This function grabs a device-level runtime pm reference if the device is * already in use and ensures that it is powered up. * * Any runtime pm reference obtained by this function must have a symmetric * call to intel_runtime_pm_put() to release the reference again. */ bool intel_runtime_pm_get_if_in_use(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; struct device *kdev = &pdev->dev; if (IS_ENABLED(CONFIG_PM)) { int ret = pm_runtime_get_if_in_use(kdev); /* * In cases runtime PM is disabled by the RPM core and we get * an -EINVAL return value we are not supposed to call this * function, since the power state is undefined. This applies * atm to the late/early system suspend/resume handlers. */ WARN_ON_ONCE(ret < 0); if (ret <= 0) return false; } atomic_inc(&dev_priv->pm.wakeref_count); assert_rpm_wakelock_held(dev_priv); return true; } /** * intel_runtime_pm_get_noresume - grab a runtime pm reference * @dev_priv: i915 device instance * * This function grabs a device-level runtime pm reference (mostly used for GEM * code to ensure the GTT or GT is on). * * It will _not_ power up the device but instead only check that it's powered * on. Therefore it is only valid to call this functions from contexts where * the device is known to be powered up and where trying to power it up would * result in hilarity and deadlocks. That pretty much means only the system * suspend/resume code where this is used to grab runtime pm references for * delayed setup down in work items. * * Any runtime pm reference obtained by this function must have a symmetric * call to intel_runtime_pm_put() to release the reference again. */ void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; struct device *kdev = &pdev->dev; assert_rpm_wakelock_held(dev_priv); pm_runtime_get_noresume(kdev); atomic_inc(&dev_priv->pm.wakeref_count); } /** * intel_runtime_pm_put - release a runtime pm reference * @dev_priv: i915 device instance * * This function drops the device-level runtime pm reference obtained by * intel_runtime_pm_get() and might power down the corresponding * hardware block right away if this is the last reference. */ void intel_runtime_pm_put(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; struct device *kdev = &pdev->dev; assert_rpm_wakelock_held(dev_priv); if (atomic_dec_and_test(&dev_priv->pm.wakeref_count)) atomic_inc(&dev_priv->pm.atomic_seq); pm_runtime_mark_last_busy(kdev); pm_runtime_put_autosuspend(kdev); } /** * intel_runtime_pm_enable - enable runtime pm * @dev_priv: i915 device instance * * This function enables runtime pm at the end of the driver load sequence. * * Note that this function does currently not enable runtime pm for the * subordinate display power domains. That is only done on the first modeset * using intel_display_set_init_power(). */ void intel_runtime_pm_enable(struct drm_i915_private *dev_priv) { struct pci_dev *pdev = dev_priv->drm.pdev; struct device *kdev = &pdev->dev; pm_runtime_set_autosuspend_delay(kdev, 10000); /* 10s */ pm_runtime_mark_last_busy(kdev); /* * Take a permanent reference to disable the RPM functionality and drop * it only when unloading the driver. Use the low level get/put helpers, * so the driver's own RPM reference tracking asserts also work on * platforms without RPM support. */ if (!HAS_RUNTIME_PM(dev_priv)) { pm_runtime_dont_use_autosuspend(kdev); pm_runtime_get_sync(kdev); } else { pm_runtime_use_autosuspend(kdev); } /* * The core calls the driver load handler with an RPM reference held. * We drop that here and will reacquire it during unloading in * intel_power_domains_fini(). */ pm_runtime_put_autosuspend(kdev); }