diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_panel.c | 1833 |
1 files changed, 65 insertions, 1768 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 7d7a60b4d2de..a0c8e43db5eb 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -28,26 +28,51 @@ * Chris Wilson <chris@chris-wilson.co.uk> */ -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - #include <linux/kernel.h> -#include <linux/moduleparam.h> #include <linux/pwm.h> +#include "intel_backlight.h" #include "intel_connector.h" #include "intel_de.h" #include "intel_display_types.h" -#include "intel_dp_aux_backlight.h" -#include "intel_dsi_dcs_backlight.h" #include "intel_panel.h" -void -intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, - struct drm_display_mode *adjusted_mode) +bool intel_panel_use_ssc(struct drm_i915_private *i915) +{ + if (i915->params.panel_use_ssc >= 0) + return i915->params.panel_use_ssc != 0; + return i915->vbt.lvds_use_ssc + && !(i915->quirks & QUIRK_LVDS_SSC_DISABLE); +} + +int intel_panel_compute_config(struct intel_connector *connector, + struct drm_display_mode *adjusted_mode) { + const struct drm_display_mode *fixed_mode = connector->panel.fixed_mode; + + if (!fixed_mode) + return 0; + + /* + * We don't want to lie too much to the user about the refresh + * rate they're going to get. But we have to allow a bit of latitude + * for Xorg since it likes to automagically cook up modes with slightly + * off refresh rates. + */ + if (abs(drm_mode_vrefresh(adjusted_mode) - drm_mode_vrefresh(fixed_mode)) > 1) { + drm_dbg_kms(connector->base.dev, + "[CONNECTOR:%d:%s] Requested mode vrefresh (%d Hz) does not match fixed mode vrefresh (%d Hz)\n", + connector->base.base.id, connector->base.name, + drm_mode_vrefresh(adjusted_mode), drm_mode_vrefresh(fixed_mode)); + + return -EINVAL; + } + drm_mode_copy(adjusted_mode, fixed_mode); drm_mode_set_crtcinfo(adjusted_mode, 0); + + return 0; } static bool is_downclock_mode(const struct drm_display_mode *downclock_mode, @@ -175,8 +200,8 @@ intel_panel_vbt_fixed_mode(struct intel_connector *connector) } /* adjusted_mode has been preset to be the panel's fixed mode */ -int intel_pch_panel_fitting(struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) +static int pch_panel_fitting(struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) { const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; @@ -381,8 +406,8 @@ static void i9xx_scale_aspect(struct intel_crtc_state *crtc_state, } } -int intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) +static int gmch_panel_fitting(struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); @@ -456,1783 +481,55 @@ out: return 0; } -/** - * scale - scale values from one range to another - * @source_val: value in range [@source_min..@source_max] - * @source_min: minimum legal value for @source_val - * @source_max: maximum legal value for @source_val - * @target_min: corresponding target value for @source_min - * @target_max: corresponding target value for @source_max - * - * Return @source_val in range [@source_min..@source_max] scaled to range - * [@target_min..@target_max]. - */ -static u32 scale(u32 source_val, - u32 source_min, u32 source_max, - u32 target_min, u32 target_max) -{ - u64 target_val; - - WARN_ON(source_min > source_max); - WARN_ON(target_min > target_max); - - /* defensive */ - source_val = clamp(source_val, source_min, source_max); - - /* avoid overflows */ - target_val = mul_u32_u32(source_val - source_min, - target_max - target_min); - target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); - target_val += target_min; - - return target_val; -} - -/* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result - * to [hw_min..hw_max]. */ -static u32 clamp_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); - hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); - - return hw_level; -} - -/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ -static u32 scale_hw_to_user(struct intel_connector *connector, - u32 hw_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(hw_level, panel->backlight.min, panel->backlight.max, - 0, user_max); -} - -u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - if (dev_priv->params.invert_brightness < 0) - return val; - - if (dev_priv->params.invert_brightness > 0 || - dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { - return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; - } - - return val; -} - -void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val); - panel->backlight.pwm_funcs->set(conn_state, val); -} - -u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON_ONCE(&dev_priv->drm, - panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); - - val = scale(val, panel->backlight.min, panel->backlight.max, - panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); - - return intel_panel_invert_pwm_level(connector, val); -} - -u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_WARN_ON_ONCE(&dev_priv->drm, - panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); - - if (dev_priv->params.invert_brightness > 0 || - (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)) - val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); - - return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, - panel->backlight.min, panel->backlight.max); -} - -static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 pch_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 i9xx_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val; - - val = intel_de_read(dev_priv, BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; - if (DISPLAY_VER(dev_priv) < 4) - val >>= 1; - - if (panel->backlight.combination_mode) { - u8 lbpc; - - pci_read_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, &lbpc); - val *= lbpc; - } - - return val; -} - -static u32 vlv_get_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) - return 0; - - return intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; -} - -static u32 bxt_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - return intel_de_read(dev_priv, - BXT_BLC_PWM_DUTY(panel->backlight.controller)); -} - -static u32 ext_pwm_get_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct intel_panel *panel = &connector->panel; - struct pwm_state state; - - pwm_get_state(panel->backlight.pwm, &state); - return pwm_get_relative_duty_cycle(&state, 100); -} - -static void lpt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - u32 val = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, val | level); -} - -static void pch_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, BLC_PWM_CPU_CTL, tmp | level); -} - -static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp, mask; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - if (panel->backlight.combination_mode) { - u8 lbpc; - - lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; - level /= lbpc; - pci_write_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, lbpc); - } - - if (DISPLAY_VER(dev_priv) == 4) { - mask = BACKLIGHT_DUTY_CYCLE_MASK; - } else { - level <<= 1; - mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; - } - - tmp = intel_de_read(dev_priv, BLC_PWM_CTL) & ~mask; - intel_de_write(dev_priv, BLC_PWM_CTL, tmp | level); -} - -static void vlv_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 tmp; - - tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), tmp | level); -} - -static void bxt_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - intel_de_write(dev_priv, - BXT_BLC_PWM_DUTY(panel->backlight.controller), level); -} - -static void ext_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; - - pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -static void -intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level); - - panel->backlight.funcs->set(conn_state, level); -} - -/* set backlight brightness to level in range [0..max], assuming hw min is - * respected. - */ -void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - /* - * Lack of crtc may occur during driver init because - * connection_mutex isn't held across the entire backlight - * setup + modeset readout, and the BIOS can issue the - * requests at any time. - */ - if (!panel->backlight.present || !conn_state->crtc) - return; - - mutex_lock(&dev_priv->backlight_lock); - - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); - - hw_level = clamp_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, level); - - /* - * Although we don't support or enable CPU PWM with LPT/SPT based - * systems, it may have been enabled prior to loading the - * driver. Disable to avoid warnings on LCPLL disable. - * - * This needs rework if we need to add support for CPU PWM on PCH split - * platforms. - */ - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - if (tmp & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, - "cpu backlight was enabled, disabling\n"); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, - tmp & ~BLM_PWM_ENABLE); - } - - tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void pch_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); - - tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); -} - -static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - intel_panel_set_pwm_level(old_conn_state, val); -} - -static void i965_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, BLC_PWM_CTL2); - intel_de_write(dev_priv, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); -} - -static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), - tmp & ~BLM_PWM_ENABLE); -} - -static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); - - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - val &= ~UTIL_PIN_ENABLE; - intel_de_write(dev_priv, UTIL_PIN_CTL, val); - } -} - -static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 tmp; - - intel_panel_set_pwm_level(old_conn_state, val); - - tmp = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - tmp & ~BXT_BLC_PWM_ENABLE); -} - -static void ext_pwm_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_state.enabled = false; - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state) -{ - struct intel_connector *connector = to_intel_connector(old_conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - if (!panel->backlight.present) - return; - - /* - * Do not disable backlight on the vga_switcheroo path. When switching - * away from i915, the other client may depend on i915 to handle the - * backlight. This will leave the backlight on unnecessarily when - * another client is not activated. - */ - if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) { - drm_dbg_kms(&dev_priv->drm, - "Skipping backlight disable on vga switch\n"); - return; - } - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_POWERDOWN; - panel->backlight.enabled = false; - panel->backlight.funcs->disable(old_conn_state, 0); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pch_ctl1, pch_ctl2, schicken; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (HAS_PCH_LPT(dev_priv)) { - schicken = intel_de_read(dev_priv, SOUTH_CHICKEN2); - if (panel->backlight.alternate_pwm_increment) - schicken |= LPT_PWM_GRANULARITY; - else - schicken &= ~LPT_PWM_GRANULARITY; - intel_de_write(dev_priv, SOUTH_CHICKEN2, schicken); - } else { - schicken = intel_de_read(dev_priv, SOUTH_CHICKEN1); - if (panel->backlight.alternate_pwm_increment) - schicken |= SPT_PWM_GRANULARITY; - else - schicken &= ~SPT_PWM_GRANULARITY; - intel_de_write(dev_priv, SOUTH_CHICKEN1, schicken); - } - - pch_ctl2 = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - /* After LPT, override is the default. */ - if (HAS_PCH_LPT(dev_priv)) - pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; - - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_set_pwm_level(conn_state, level); -} - -static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; - u32 cpu_ctl2, pch_ctl1, pch_ctl2; - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - if (cpu_ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "cpu backlight already enabled\n"); - cpu_ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); - } - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); - pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - } - - if (cpu_transcoder == TRANSCODER_EDP) - cpu_ctl2 = BLM_TRANSCODER_EDP; - else - cpu_ctl2 = BLM_PIPE(cpu_transcoder); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); - intel_de_posting_read(dev_priv, BLC_PWM_CPU_CTL2); - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); - - /* This won't stick until the above enable. */ - intel_panel_set_pwm_level(conn_state, level); - - pch_ctl2 = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); - - pch_ctl1 = 0; - if (panel->backlight.active_low_pwm) - pch_ctl1 |= BLM_PCH_POLARITY; - - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); - intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_PWM_ENABLE); -} - -static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, freq; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - intel_de_write(dev_priv, BLC_PWM_CTL, 0); - } - - freq = panel->backlight.pwm_level_max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 17; - if (panel->backlight.combination_mode) - ctl |= BLM_LEGACY_MODE; - if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) - ctl |= BLM_POLARITY_PNV; - - intel_de_write(dev_priv, BLC_PWM_CTL, ctl); - intel_de_posting_read(dev_priv, BLC_PWM_CTL); - - /* XXX: combine this into above write? */ - intel_panel_set_pwm_level(conn_state, level); - - /* - * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is - * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 - * that has backlight. - */ - if (DISPLAY_VER(dev_priv) == 2) - intel_de_write(dev_priv, BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); -} - -static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; - u32 ctl, ctl2, freq; - - ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); - if (ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); - } - - freq = panel->backlight.pwm_level_max; - if (panel->backlight.combination_mode) - freq /= 0xff; - - ctl = freq << 16; - intel_de_write(dev_priv, BLC_PWM_CTL, ctl); - - ctl2 = BLM_PIPE(pipe); - if (panel->backlight.combination_mode) - ctl2 |= BLM_COMBINATION_MODE; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); - intel_de_posting_read(dev_priv, BLC_PWM_CTL2); - intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); - - intel_panel_set_pwm_level(conn_state, level); -} - -static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - u32 ctl, ctl2; - - ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - if (ctl2 & BLM_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - ctl2 &= ~BLM_PWM_ENABLE; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); - } - - ctl = panel->backlight.pwm_level_max << 16; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), ctl); - - /* XXX: combine this into above write? */ - intel_panel_set_pwm_level(conn_state, level); - - ctl2 = 0; - if (panel->backlight.active_low_pwm) - ctl2 |= BLM_POLARITY_I965; - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); - intel_de_posting_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), - ctl2 | BLM_PWM_ENABLE); -} - -static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - u32 pwm_ctl, val; - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - if (val & UTIL_PIN_ENABLE) { - drm_dbg_kms(&dev_priv->drm, - "util pin already enabled\n"); - val &= ~UTIL_PIN_ENABLE; - intel_de_write(dev_priv, UTIL_PIN_CTL, val); - } - - val = 0; - if (panel->backlight.util_pin_active_low) - val |= UTIL_PIN_POLARITY; - intel_de_write(dev_priv, UTIL_PIN_CTL, - val | UTIL_PIN_PIPE(pipe) | UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); - } - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - intel_de_write(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - intel_de_write(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.pwm_level_max); - - intel_panel_set_pwm_level(conn_state, level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - intel_de_posting_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - if (pwm_ctl & BXT_BLC_PWM_ENABLE) { - drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); - pwm_ctl &= ~BXT_BLC_PWM_ENABLE; - intel_de_write(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - } - - intel_de_write(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.pwm_level_max); - - intel_panel_set_pwm_level(conn_state, level); - - pwm_ctl = 0; - if (panel->backlight.active_low_pwm) - pwm_ctl |= BXT_BLC_PWM_POLARITY; - - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl); - intel_de_posting_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), - pwm_ctl | BXT_BLC_PWM_ENABLE); -} - -static void ext_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); - panel->backlight.pwm_state.enabled = true; - pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); -} - -static void __intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - WARN_ON(panel->backlight.max == 0); - - if (panel->backlight.level <= panel->backlight.min) { - panel->backlight.level = panel->backlight.max; - if (panel->backlight.device) - panel->backlight.device->props.brightness = - scale_hw_to_user(connector, - panel->backlight.level, - panel->backlight.device->props.max_brightness); - } - - panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level); - panel->backlight.enabled = true; - if (panel->backlight.device) - panel->backlight.device->props.power = FB_BLANK_UNBLANK; -} - -void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; - - if (!panel->backlight.present) - return; - - drm_dbg_kms(&dev_priv->drm, "pipe %c\n", pipe_name(pipe)); - - mutex_lock(&dev_priv->backlight_lock); - - __intel_panel_enable_backlight(crtc_state, conn_state); - - mutex_unlock(&dev_priv->backlight_lock); -} - -#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) -static u32 intel_panel_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 val = 0; - - mutex_lock(&dev_priv->backlight_lock); - - if (panel->backlight.enabled) - val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); - - mutex_unlock(&dev_priv->backlight_lock); - - drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val); - return val; -} - -/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ -static u32 scale_user_to_hw(struct intel_connector *connector, - u32 user_level, u32 user_max) -{ - struct intel_panel *panel = &connector->panel; - - return scale(user_level, 0, user_max, - panel->backlight.min, panel->backlight.max); -} - -/* set backlight brightness to level in range [0..max], scaling wrt hw min */ -static void intel_panel_set_backlight(const struct drm_connector_state *conn_state, - u32 user_level, u32 user_max) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 hw_level; - - if (!panel->backlight.present) - return; - - mutex_lock(&dev_priv->backlight_lock); - - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); - - hw_level = scale_user_to_hw(connector, user_level, user_max); - panel->backlight.level = hw_level; - - if (panel->backlight.enabled) - intel_panel_actually_set_backlight(conn_state, hw_level); - - mutex_unlock(&dev_priv->backlight_lock); -} - -static int intel_backlight_device_update_status(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct intel_panel *panel = &connector->panel; - struct drm_device *dev = connector->base.dev; - - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", - bd->props.brightness, bd->props.max_brightness); - intel_panel_set_backlight(connector->base.state, bd->props.brightness, - bd->props.max_brightness); - - /* - * Allow flipping bl_power as a sub-state of enabled. Sadly the - * backlight class device does not make it easy to to differentiate - * between callbacks for brightness and bl_power, so our backlight_power - * callback needs to take this into account. - */ - if (panel->backlight.enabled) { - if (panel->backlight.power) { - bool enable = bd->props.power == FB_BLANK_UNBLANK && - bd->props.brightness != 0; - panel->backlight.power(connector, enable); - } - } else { - bd->props.power = FB_BLANK_POWERDOWN; - } - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - return 0; -} - -static int intel_backlight_device_get_brightness(struct backlight_device *bd) -{ - struct intel_connector *connector = bl_get_data(bd); - struct drm_device *dev = connector->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - intel_wakeref_t wakeref; - int ret = 0; - - with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) { - u32 hw_level; - - drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); - - hw_level = intel_panel_get_backlight(connector); - ret = scale_hw_to_user(connector, - hw_level, bd->props.max_brightness); - - drm_modeset_unlock(&dev->mode_config.connection_mutex); - } - - return ret; -} - -static const struct backlight_ops intel_backlight_device_ops = { - .update_status = intel_backlight_device_update_status, - .get_brightness = intel_backlight_device_get_brightness, -}; - -int intel_backlight_device_register(struct intel_connector *connector) -{ - struct drm_i915_private *i915 = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - struct backlight_properties props; - struct backlight_device *bd; - const char *name; - int ret = 0; - - if (WARN_ON(panel->backlight.device)) - return -ENODEV; - - if (!panel->backlight.present) - return 0; - - WARN_ON(panel->backlight.max == 0); - - memset(&props, 0, sizeof(props)); - props.type = BACKLIGHT_RAW; - - /* - * Note: Everything should work even if the backlight device max - * presented to the userspace is arbitrarily chosen. - */ - props.max_brightness = panel->backlight.max; - props.brightness = scale_hw_to_user(connector, - panel->backlight.level, - props.max_brightness); - - if (panel->backlight.enabled) - props.power = FB_BLANK_UNBLANK; - else - props.power = FB_BLANK_POWERDOWN; - - name = kstrdup("intel_backlight", GFP_KERNEL); - if (!name) - return -ENOMEM; - - bd = backlight_device_register(name, connector->base.kdev, connector, - &intel_backlight_device_ops, &props); - - /* - * Using the same name independent of the drm device or connector - * prevents registration of multiple backlight devices in the - * driver. However, we need to use the default name for backward - * compatibility. Use unique names for subsequent backlight devices as a - * fallback when the default name already exists. - */ - if (IS_ERR(bd) && PTR_ERR(bd) == -EEXIST) { - kfree(name); - name = kasprintf(GFP_KERNEL, "card%d-%s-backlight", - i915->drm.primary->index, connector->base.name); - if (!name) - return -ENOMEM; - - bd = backlight_device_register(name, connector->base.kdev, connector, - &intel_backlight_device_ops, &props); - } - - if (IS_ERR(bd)) { - drm_err(&i915->drm, - "[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n", - connector->base.base.id, connector->base.name, name, PTR_ERR(bd)); - ret = PTR_ERR(bd); - goto out; - } - - panel->backlight.device = bd; - - drm_dbg_kms(&i915->drm, - "[CONNECTOR:%d:%s] backlight device %s registered\n", - connector->base.base.id, connector->base.name, name); - -out: - kfree(name); - - return ret; -} - -void intel_backlight_device_unregister(struct intel_connector *connector) -{ - struct intel_panel *panel = &connector->panel; - - if (panel->backlight.device) { - backlight_device_unregister(panel->backlight.device); - panel->backlight.device = NULL; - } -} -#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ - -/* - * CNP: PWM clock frequency is 19.2 MHz or 24 MHz. - * PWM increment = 1 - */ -static u32 cnp_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), - pwm_freq_hz); -} - -/* - * BXT: PWM clock frequency = 19.2 MHz. - */ -static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); -} - -/* - * SPT: This value represents the period of the PWM stream in clock periods - * multiplied by 16 (default increment) or 128 (alternate increment selected in - * SCHICKEN_1 bit 0). PWM clock is 24 MHz. - */ -static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct intel_panel *panel = &connector->panel; - u32 mul; - - if (panel->backlight.alternate_pwm_increment) - mul = 128; - else - mul = 16; - - return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); -} - -/* - * LPT: This value represents the period of the PWM stream in clock periods - * multiplied by 128 (default increment) or 16 (alternate increment, selected in - * LPT SOUTH_CHICKEN2 register bit 5). - */ -static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 mul, clock; - - if (panel->backlight.alternate_pwm_increment) - mul = 16; - else - mul = 128; - - if (HAS_PCH_LPT_H(dev_priv)) - clock = MHz(135); /* LPT:H */ - else - clock = MHz(24); /* LPT:LP */ - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -/* - * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH - * display raw clocks multiplied by 128. - */ -static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - - return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), - pwm_freq_hz * 128); -} - -/* - * Gen2: This field determines the number of time base events (display core - * clock frequency/32) in total for a complete cycle of modulated backlight - * control. - * - * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) - * divided by 32. - */ -static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_PINEVIEW(dev_priv)) - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); -} - -/* - * Gen4: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] HRAW clocks) multiplied by 128. - * - */ -static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) +int intel_panel_fitting(struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state) { - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int clock; - - if (IS_G4X(dev_priv)) - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - else - clock = KHz(dev_priv->cdclk.hw.cdclk); - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); -} - -/* - * VLV: This value represents the period of the PWM stream in display core - * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks - * multiplied by 16. CHV uses a 19.2MHz S0IX clock. - */ -static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - int mul, clock; - - if ((intel_de_read(dev_priv, CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { - if (IS_CHERRYVIEW(dev_priv)) - clock = KHz(19200); - else - clock = MHz(25); - mul = 16; - } else { - clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); - mul = 128; - } - - return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); -} - -static u16 get_vbt_pwm_freq(struct drm_i915_private *dev_priv) -{ - u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; - - if (pwm_freq_hz) { - drm_dbg_kms(&dev_priv->drm, - "VBT defined backlight frequency %u Hz\n", - pwm_freq_hz); - } else { - pwm_freq_hz = 200; - drm_dbg_kms(&dev_priv->drm, - "default backlight frequency %u Hz\n", - pwm_freq_hz); - } - - return pwm_freq_hz; -} - -static u32 get_backlight_max_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); - u32 pwm; - - if (!panel->backlight.pwm_funcs->hz_to_pwm) { - drm_dbg_kms(&dev_priv->drm, - "backlight frequency conversion not supported\n"); - return 0; - } - - pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); - if (!pwm) { - drm_dbg_kms(&dev_priv->drm, - "backlight frequency conversion failed\n"); - return 0; - } - - return pwm; -} - -/* - * Note: The setup hooks can't assume pipe is set! - */ -static u32 get_backlight_min_vbt(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - int min; - - drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); - - /* - * XXX: If the vbt value is 255, it makes min equal to max, which leads - * to problems. There are such machines out there. Either our - * interpretation is wrong or the vbt has bogus data. Or both. Safeguard - * against this by letting the minimum be at most (arbitrarily chosen) - * 25% of the max. - */ - min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); - if (min != dev_priv->vbt.backlight.min_brightness) { - drm_dbg_kms(&dev_priv->drm, - "clamping VBT min backlight %d/255 to %d/255\n", - dev_priv->vbt.backlight.min_brightness, min); - } - - /* vbt value is a coefficient in range [0..255] */ - return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); -} - -static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; - bool alt, cpu_mode; + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *i915 = to_i915(crtc->base.dev); - if (HAS_PCH_LPT(dev_priv)) - alt = intel_de_read(dev_priv, SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; + if (HAS_GMCH(i915)) + return gmch_panel_fitting(crtc_state, conn_state); else - alt = intel_de_read(dev_priv, SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; - panel->backlight.alternate_pwm_increment = alt; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.pwm_level_max = pch_ctl2 >> 16; - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; - - cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) && - !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && - (cpu_ctl2 & BLM_PWM_ENABLE); - - if (cpu_mode) { - val = pch_get_backlight(connector, unused); - - drm_dbg_kms(&dev_priv->drm, - "CPU backlight register was enabled, switching to PCH override\n"); - - /* Write converted CPU PWM value to PCH override register */ - lpt_set_backlight(connector->base.state, val); - intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, - pch_ctl1 | BLM_PCH_OVERRIDE_ENABLE); - - intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, - cpu_ctl2 & ~BLM_PWM_ENABLE); - } - - return 0; -} - -static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2; - - pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); - panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; - - pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.pwm_level_max = pch_ctl2 >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && - (pch_ctl1 & BLM_PCH_PWM_ENABLE); - - return 0; -} - -static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, val; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - - if (DISPLAY_VER(dev_priv) == 2 || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) - panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; - - if (IS_PINEVIEW(dev_priv)) - panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; - - panel->backlight.pwm_level_max = ctl >> 17; - - if (!panel->backlight.pwm_level_max) { - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - panel->backlight.pwm_level_max >>= 1; - } - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.pwm_level_max *= 0xff; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - val = i9xx_get_backlight(connector, unused); - val = intel_panel_invert_pwm_level(connector, val); - val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); - - panel->backlight.pwm_enabled = val != 0; - - return 0; -} - -static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2; - - ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); - panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - panel->backlight.pwm_level_max = ctl >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - if (panel->backlight.combination_mode) - panel->backlight.pwm_level_max *= 0xff; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2; - - if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) - return -ENODEV; - - ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); - panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; - - ctl = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)); - panel->backlight.pwm_level_max = ctl >> 16; - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; - - return 0; -} - -static int -bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl, val; - - panel->backlight.controller = dev_priv->vbt.backlight.controller; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - - /* Controller 1 uses the utility pin. */ - if (panel->backlight.controller == 1) { - val = intel_de_read(dev_priv, UTIL_PIN_CTL); - panel->backlight.util_pin_active_low = - val & UTIL_PIN_POLARITY; - } - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.pwm_level_max = - intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int -cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - u32 pwm_ctl; - - /* - * CNP has the BXT implementation of backlight, but with only one - * controller. TODO: ICP has multiple controllers but we only use - * controller 0 for now. - */ - panel->backlight.controller = 0; - - pwm_ctl = intel_de_read(dev_priv, - BXT_BLC_PWM_CTL(panel->backlight.controller)); - - panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.pwm_level_max = - intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - - if (!panel->backlight.pwm_level_max) - panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - - if (!panel->backlight.pwm_level_max) - return -ENODEV; - - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; - - return 0; -} - -static int ext_pwm_setup_backlight(struct intel_connector *connector, - enum pipe pipe) -{ - struct drm_device *dev = connector->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - struct intel_panel *panel = &connector->panel; - const char *desc; - u32 level; - - /* Get the right PWM chip for DSI backlight according to VBT */ - if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { - panel->backlight.pwm = pwm_get(dev->dev, "pwm_pmic_backlight"); - desc = "PMIC"; - } else { - panel->backlight.pwm = pwm_get(dev->dev, "pwm_soc_backlight"); - desc = "SoC"; - } - - if (IS_ERR(panel->backlight.pwm)) { - drm_err(&dev_priv->drm, "Failed to get the %s PWM chip\n", - desc); - panel->backlight.pwm = NULL; - return -ENODEV; - } - - panel->backlight.pwm_level_max = 100; /* 100% */ - panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - - if (pwm_is_enabled(panel->backlight.pwm)) { - /* PWM is already enabled, use existing settings */ - pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state); - - level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, - 100); - level = intel_panel_invert_pwm_level(connector, level); - panel->backlight.pwm_enabled = true; - - drm_dbg_kms(&dev_priv->drm, "PWM already enabled at freq %ld, VBT freq %d, level %d\n", - NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, - get_vbt_pwm_freq(dev_priv), level); - } else { - /* Set period from VBT frequency, leave other settings at 0. */ - panel->backlight.pwm_state.period = - NSEC_PER_SEC / get_vbt_pwm_freq(dev_priv); - } - - drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n", - desc); - return 0; -} - -static void intel_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->set(conn_state, - intel_panel_invert_pwm_level(connector, level)); + return pch_panel_fitting(crtc_state, conn_state); } -static u32 intel_pwm_get_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct intel_panel *panel = &connector->panel; - - return intel_panel_invert_pwm_level(connector, - panel->backlight.pwm_funcs->get(connector, pipe)); -} - -static void intel_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->enable(crtc_state, conn_state, - intel_panel_invert_pwm_level(connector, level)); -} - -static void intel_pwm_disable_backlight(const struct drm_connector_state *conn_state, u32 level) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct intel_panel *panel = &connector->panel; - - panel->backlight.pwm_funcs->disable(conn_state, - intel_panel_invert_pwm_level(connector, level)); -} - -static int intel_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) -{ - struct intel_panel *panel = &connector->panel; - int ret = panel->backlight.pwm_funcs->setup(connector, pipe); - - if (ret < 0) - return ret; - - panel->backlight.min = panel->backlight.pwm_level_min; - panel->backlight.max = panel->backlight.pwm_level_max; - panel->backlight.level = intel_pwm_get_backlight(connector, pipe); - panel->backlight.enabled = panel->backlight.pwm_enabled; - - return 0; -} - -void intel_panel_update_backlight(struct intel_atomic_state *state, - struct intel_encoder *encoder, - const struct intel_crtc_state *crtc_state, - const struct drm_connector_state *conn_state) -{ - struct intel_connector *connector = to_intel_connector(conn_state->connector); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - struct intel_panel *panel = &connector->panel; - - if (!panel->backlight.present) - return; - - mutex_lock(&dev_priv->backlight_lock); - if (!panel->backlight.enabled) - __intel_panel_enable_backlight(crtc_state, conn_state); - - mutex_unlock(&dev_priv->backlight_lock); -} - -int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) +enum drm_connector_status +intel_panel_detect(struct drm_connector *connector, bool force) { - struct drm_i915_private *dev_priv = to_i915(connector->dev); - struct intel_connector *intel_connector = to_intel_connector(connector); - struct intel_panel *panel = &intel_connector->panel; - int ret; - - if (!dev_priv->vbt.backlight.present) { - if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { - drm_dbg_kms(&dev_priv->drm, - "no backlight present per VBT, but present per quirk\n"); - } else { - drm_dbg_kms(&dev_priv->drm, - "no backlight present per VBT\n"); - return 0; - } - } - - /* ensure intel_panel has been initialized first */ - if (drm_WARN_ON(&dev_priv->drm, !panel->backlight.funcs)) - return -ENODEV; - - /* set level and max in panel struct */ - mutex_lock(&dev_priv->backlight_lock); - ret = panel->backlight.funcs->setup(intel_connector, pipe); - mutex_unlock(&dev_priv->backlight_lock); - - if (ret) { - drm_dbg_kms(&dev_priv->drm, - "failed to setup backlight for connector %s\n", - connector->name); - return ret; - } - - panel->backlight.present = true; - - drm_dbg_kms(&dev_priv->drm, - "Connector %s backlight initialized, %s, brightness %u/%u\n", - connector->name, - enableddisabled(panel->backlight.enabled), - panel->backlight.level, panel->backlight.max); - - return 0; -} + struct drm_i915_private *i915 = to_i915(connector->dev); -static void intel_panel_destroy_backlight(struct intel_panel *panel) -{ - /* dispose of the pwm */ - if (panel->backlight.pwm) - pwm_put(panel->backlight.pwm); + if (!INTEL_DISPLAY_ENABLED(i915)) + return connector_status_disconnected; - panel->backlight.present = false; + return connector_status_connected; } -static const struct intel_panel_bl_funcs bxt_pwm_funcs = { - .setup = bxt_setup_backlight, - .enable = bxt_enable_backlight, - .disable = bxt_disable_backlight, - .set = bxt_set_backlight, - .get = bxt_get_backlight, - .hz_to_pwm = bxt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs cnp_pwm_funcs = { - .setup = cnp_setup_backlight, - .enable = cnp_enable_backlight, - .disable = cnp_disable_backlight, - .set = bxt_set_backlight, - .get = bxt_get_backlight, - .hz_to_pwm = cnp_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs lpt_pwm_funcs = { - .setup = lpt_setup_backlight, - .enable = lpt_enable_backlight, - .disable = lpt_disable_backlight, - .set = lpt_set_backlight, - .get = lpt_get_backlight, - .hz_to_pwm = lpt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs spt_pwm_funcs = { - .setup = lpt_setup_backlight, - .enable = lpt_enable_backlight, - .disable = lpt_disable_backlight, - .set = lpt_set_backlight, - .get = lpt_get_backlight, - .hz_to_pwm = spt_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs pch_pwm_funcs = { - .setup = pch_setup_backlight, - .enable = pch_enable_backlight, - .disable = pch_disable_backlight, - .set = pch_set_backlight, - .get = pch_get_backlight, - .hz_to_pwm = pch_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs ext_pwm_funcs = { - .setup = ext_pwm_setup_backlight, - .enable = ext_pwm_enable_backlight, - .disable = ext_pwm_disable_backlight, - .set = ext_pwm_set_backlight, - .get = ext_pwm_get_backlight, -}; - -static const struct intel_panel_bl_funcs vlv_pwm_funcs = { - .setup = vlv_setup_backlight, - .enable = vlv_enable_backlight, - .disable = vlv_disable_backlight, - .set = vlv_set_backlight, - .get = vlv_get_backlight, - .hz_to_pwm = vlv_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs i965_pwm_funcs = { - .setup = i965_setup_backlight, - .enable = i965_enable_backlight, - .disable = i965_disable_backlight, - .set = i9xx_set_backlight, - .get = i9xx_get_backlight, - .hz_to_pwm = i965_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs i9xx_pwm_funcs = { - .setup = i9xx_setup_backlight, - .enable = i9xx_enable_backlight, - .disable = i9xx_disable_backlight, - .set = i9xx_set_backlight, - .get = i9xx_get_backlight, - .hz_to_pwm = i9xx_hz_to_pwm, -}; - -static const struct intel_panel_bl_funcs pwm_bl_funcs = { - .setup = intel_pwm_setup_backlight, - .enable = intel_pwm_enable_backlight, - .disable = intel_pwm_disable_backlight, - .set = intel_pwm_set_backlight, - .get = intel_pwm_get_backlight, -}; - -/* Set up chip specific backlight functions */ -static void -intel_panel_init_backlight_funcs(struct intel_panel *panel) +enum drm_mode_status +intel_panel_mode_valid(struct intel_connector *connector, + const struct drm_display_mode *mode) { - struct intel_connector *connector = - container_of(panel, struct intel_connector, panel); - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + const struct drm_display_mode *fixed_mode = connector->panel.fixed_mode; - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && - intel_dsi_dcs_init_backlight_funcs(connector) == 0) - return; - - if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) { - panel->backlight.pwm_funcs = &bxt_pwm_funcs; - } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) { - panel->backlight.pwm_funcs = &cnp_pwm_funcs; - } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_LPT) { - if (HAS_PCH_LPT(dev_priv)) - panel->backlight.pwm_funcs = &lpt_pwm_funcs; - else - panel->backlight.pwm_funcs = &spt_pwm_funcs; - } else if (HAS_PCH_SPLIT(dev_priv)) { - panel->backlight.pwm_funcs = &pch_pwm_funcs; - } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { - panel->backlight.pwm_funcs = &ext_pwm_funcs; - } else { - panel->backlight.pwm_funcs = &vlv_pwm_funcs; - } - } else if (DISPLAY_VER(dev_priv) == 4) { - panel->backlight.pwm_funcs = &i965_pwm_funcs; - } else { - panel->backlight.pwm_funcs = &i9xx_pwm_funcs; - } - - if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && - intel_dp_aux_init_backlight_funcs(connector) == 0) - return; + if (!fixed_mode) + return MODE_OK; - /* We're using a standard PWM backlight interface */ - panel->backlight.funcs = &pwm_bl_funcs; -} + if (mode->hdisplay != fixed_mode->hdisplay) + return MODE_PANEL; -enum drm_connector_status -intel_panel_detect(struct drm_connector *connector, bool force) -{ - struct drm_i915_private *i915 = to_i915(connector->dev); + if (mode->vdisplay != fixed_mode->vdisplay) + return MODE_PANEL; - if (!INTEL_DISPLAY_ENABLED(i915)) - return connector_status_disconnected; + if (drm_mode_vrefresh(mode) != drm_mode_vrefresh(fixed_mode)) + return MODE_PANEL; - return connector_status_connected; + return MODE_OK; } int intel_panel_init(struct intel_panel *panel, struct drm_display_mode *fixed_mode, struct drm_display_mode *downclock_mode) { - intel_panel_init_backlight_funcs(panel); + intel_backlight_init_funcs(panel); panel->fixed_mode = fixed_mode; panel->downclock_mode = downclock_mode; @@ -2245,7 +542,7 @@ void intel_panel_fini(struct intel_panel *panel) struct intel_connector *intel_connector = container_of(panel, struct intel_connector, panel); - intel_panel_destroy_backlight(panel); + intel_backlight_destroy(panel); if (panel->fixed_mode) drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); |