diff options
Diffstat (limited to 'drivers/gpu/host1x/drm/dc.c')
| -rw-r--r-- | drivers/gpu/host1x/drm/dc.c | 1200 |
1 files changed, 1200 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/drm/dc.c b/drivers/gpu/host1x/drm/dc.c new file mode 100644 index 000000000000..1e2060324f02 --- /dev/null +++ b/drivers/gpu/host1x/drm/dc.c @@ -0,0 +1,1200 @@ +/* + * Copyright (C) 2012 Avionic Design GmbH + * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/debugfs.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/clk/tegra.h> + +#include "host1x_client.h" +#include "dc.h" +#include "drm.h" +#include "gem.h" + +struct tegra_plane { + struct drm_plane base; + unsigned int index; +}; + +static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane) +{ + return container_of(plane, struct tegra_plane, base); +} + +static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc, + struct drm_framebuffer *fb, int crtc_x, + int crtc_y, unsigned int crtc_w, + unsigned int crtc_h, uint32_t src_x, + uint32_t src_y, uint32_t src_w, uint32_t src_h) +{ + struct tegra_plane *p = to_tegra_plane(plane); + struct tegra_dc *dc = to_tegra_dc(crtc); + struct tegra_dc_window window; + unsigned int i; + + memset(&window, 0, sizeof(window)); + window.src.x = src_x >> 16; + window.src.y = src_y >> 16; + window.src.w = src_w >> 16; + window.src.h = src_h >> 16; + window.dst.x = crtc_x; + window.dst.y = crtc_y; + window.dst.w = crtc_w; + window.dst.h = crtc_h; + window.format = tegra_dc_format(fb->pixel_format); + window.bits_per_pixel = fb->bits_per_pixel; + + for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) { + struct tegra_bo *bo = tegra_fb_get_plane(fb, i); + + window.base[i] = bo->paddr + fb->offsets[i]; + + /* + * Tegra doesn't support different strides for U and V planes + * so we display a warning if the user tries to display a + * framebuffer with such a configuration. + */ + if (i >= 2) { + if (fb->pitches[i] != window.stride[1]) + DRM_ERROR("unsupported UV-plane configuration\n"); + } else { + window.stride[i] = fb->pitches[i]; + } + } + + return tegra_dc_setup_window(dc, p->index, &window); +} + +static int tegra_plane_disable(struct drm_plane *plane) +{ + struct tegra_dc *dc = to_tegra_dc(plane->crtc); + struct tegra_plane *p = to_tegra_plane(plane); + unsigned long value; + + value = WINDOW_A_SELECT << p->index; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER); + + value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS); + value &= ~WIN_ENABLE; + tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS); + + tegra_dc_writel(dc, WIN_A_UPDATE << p->index, DC_CMD_STATE_CONTROL); + tegra_dc_writel(dc, WIN_A_ACT_REQ << p->index, DC_CMD_STATE_CONTROL); + + return 0; +} + +static void tegra_plane_destroy(struct drm_plane *plane) +{ + tegra_plane_disable(plane); + drm_plane_cleanup(plane); +} + +static const struct drm_plane_funcs tegra_plane_funcs = { + .update_plane = tegra_plane_update, + .disable_plane = tegra_plane_disable, + .destroy = tegra_plane_destroy, +}; + +static const uint32_t plane_formats[] = { + DRM_FORMAT_XBGR8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_RGB565, + DRM_FORMAT_UYVY, + DRM_FORMAT_YUV420, + DRM_FORMAT_YUV422, +}; + +static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc) +{ + unsigned int i; + int err = 0; + + for (i = 0; i < 2; i++) { + struct tegra_plane *plane; + + plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL); + if (!plane) + return -ENOMEM; + + plane->index = 1 + i; + + err = drm_plane_init(drm, &plane->base, 1 << dc->pipe, + &tegra_plane_funcs, plane_formats, + ARRAY_SIZE(plane_formats), false); + if (err < 0) + return err; + } + + return 0; +} + +static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y, + struct drm_framebuffer *fb) +{ + struct tegra_bo *bo = tegra_fb_get_plane(fb, 0); + unsigned long value; + + tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER); + + value = fb->offsets[0] + y * fb->pitches[0] + + x * fb->bits_per_pixel / 8; + + tegra_dc_writel(dc, bo->paddr + value, DC_WINBUF_START_ADDR); + tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE); + + value = GENERAL_UPDATE | WIN_A_UPDATE; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + value = GENERAL_ACT_REQ | WIN_A_ACT_REQ; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + return 0; +} + +void tegra_dc_enable_vblank(struct tegra_dc *dc) +{ + unsigned long value, flags; + + spin_lock_irqsave(&dc->lock, flags); + + value = tegra_dc_readl(dc, DC_CMD_INT_MASK); + value |= VBLANK_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); + + spin_unlock_irqrestore(&dc->lock, flags); +} + +void tegra_dc_disable_vblank(struct tegra_dc *dc) +{ + unsigned long value, flags; + + spin_lock_irqsave(&dc->lock, flags); + + value = tegra_dc_readl(dc, DC_CMD_INT_MASK); + value &= ~VBLANK_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); + + spin_unlock_irqrestore(&dc->lock, flags); +} + +static void tegra_dc_finish_page_flip(struct tegra_dc *dc) +{ + struct drm_device *drm = dc->base.dev; + struct drm_crtc *crtc = &dc->base; + unsigned long flags, base; + struct tegra_bo *bo; + + if (!dc->event) + return; + + bo = tegra_fb_get_plane(crtc->fb, 0); + + /* check if new start address has been latched */ + tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); + base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR); + tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS); + + if (base == bo->paddr + crtc->fb->offsets[0]) { + spin_lock_irqsave(&drm->event_lock, flags); + drm_send_vblank_event(drm, dc->pipe, dc->event); + drm_vblank_put(drm, dc->pipe); + dc->event = NULL; + spin_unlock_irqrestore(&drm->event_lock, flags); + } +} + +void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + struct drm_device *drm = crtc->dev; + unsigned long flags; + + spin_lock_irqsave(&drm->event_lock, flags); + + if (dc->event && dc->event->base.file_priv == file) { + dc->event->base.destroy(&dc->event->base); + drm_vblank_put(drm, dc->pipe); + dc->event = NULL; + } + + spin_unlock_irqrestore(&drm->event_lock, flags); +} + +static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, + struct drm_pending_vblank_event *event) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + struct drm_device *drm = crtc->dev; + + if (dc->event) + return -EBUSY; + + if (event) { + event->pipe = dc->pipe; + dc->event = event; + drm_vblank_get(drm, dc->pipe); + } + + tegra_dc_set_base(dc, 0, 0, fb); + crtc->fb = fb; + + return 0; +} + +static const struct drm_crtc_funcs tegra_crtc_funcs = { + .page_flip = tegra_dc_page_flip, + .set_config = drm_crtc_helper_set_config, + .destroy = drm_crtc_cleanup, +}; + +static void tegra_crtc_disable(struct drm_crtc *crtc) +{ + struct drm_device *drm = crtc->dev; + struct drm_plane *plane; + + list_for_each_entry(plane, &drm->mode_config.plane_list, head) { + if (plane->crtc == crtc) { + tegra_plane_disable(plane); + plane->crtc = NULL; + + if (plane->fb) { + drm_framebuffer_unreference(plane->fb); + plane->fb = NULL; + } + } + } +} + +static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + return true; +} + +static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v, + unsigned int bpp) +{ + fixed20_12 outf = dfixed_init(out); + fixed20_12 inf = dfixed_init(in); + u32 dda_inc; + int max; + + if (v) + max = 15; + else { + switch (bpp) { + case 2: + max = 8; + break; + + default: + WARN_ON_ONCE(1); + /* fallthrough */ + case 4: + max = 4; + break; + } + } + + outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1)); + inf.full -= dfixed_const(1); + + dda_inc = dfixed_div(inf, outf); + dda_inc = min_t(u32, dda_inc, dfixed_const(max)); + + return dda_inc; +} + +static inline u32 compute_initial_dda(unsigned int in) +{ + fixed20_12 inf = dfixed_init(in); + return dfixed_frac(inf); +} + +static int tegra_dc_set_timings(struct tegra_dc *dc, + struct drm_display_mode *mode) +{ + /* TODO: For HDMI compliance, h & v ref_to_sync should be set to 1 */ + unsigned int h_ref_to_sync = 0; + unsigned int v_ref_to_sync = 0; + unsigned long value; + + tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS); + + value = (v_ref_to_sync << 16) | h_ref_to_sync; + tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC); + + value = ((mode->vsync_end - mode->vsync_start) << 16) | + ((mode->hsync_end - mode->hsync_start) << 0); + tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH); + + value = ((mode->vtotal - mode->vsync_end) << 16) | + ((mode->htotal - mode->hsync_end) << 0); + tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH); + + value = ((mode->vsync_start - mode->vdisplay) << 16) | + ((mode->hsync_start - mode->hdisplay) << 0); + tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH); + + value = (mode->vdisplay << 16) | mode->hdisplay; + tegra_dc_writel(dc, value, DC_DISP_ACTIVE); + + return 0; +} + +static int tegra_crtc_setup_clk(struct drm_crtc *crtc, + struct drm_display_mode *mode, + unsigned long *div) +{ + unsigned long pclk = mode->clock * 1000, rate; + struct tegra_dc *dc = to_tegra_dc(crtc); + struct tegra_output *output = NULL; + struct drm_encoder *encoder; + long err; + + list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list, head) + if (encoder->crtc == crtc) { + output = encoder_to_output(encoder); + break; + } + + if (!output) + return -ENODEV; + + /* + * This assumes that the display controller will divide its parent + * clock by 2 to generate the pixel clock. + */ + err = tegra_output_setup_clock(output, dc->clk, pclk * 2); + if (err < 0) { + dev_err(dc->dev, "failed to setup clock: %ld\n", err); + return err; + } + + rate = clk_get_rate(dc->clk); + *div = (rate * 2 / pclk) - 2; + + DRM_DEBUG_KMS("rate: %lu, div: %lu\n", rate, *div); + + return 0; +} + +static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar) +{ + switch (format) { + case WIN_COLOR_DEPTH_YCbCr422: + case WIN_COLOR_DEPTH_YUV422: + if (planar) + *planar = false; + + return true; + + case WIN_COLOR_DEPTH_YCbCr420P: + case WIN_COLOR_DEPTH_YUV420P: + case WIN_COLOR_DEPTH_YCbCr422P: + case WIN_COLOR_DEPTH_YUV422P: + case WIN_COLOR_DEPTH_YCbCr422R: + case WIN_COLOR_DEPTH_YUV422R: + case WIN_COLOR_DEPTH_YCbCr422RA: + case WIN_COLOR_DEPTH_YUV422RA: + if (planar) + *planar = true; + + return true; + } + + return false; +} + +int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index, + const struct tegra_dc_window *window) +{ + unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp; + unsigned long value; + bool yuv, planar; + + /* + * For YUV planar modes, the number of bytes per pixel takes into + * account only the luma component and therefore is 1. + */ + yuv = tegra_dc_format_is_yuv(window->format, &planar); + if (!yuv) + bpp = window->bits_per_pixel / 8; + else + bpp = planar ? 1 : 2; + + value = WINDOW_A_SELECT << index; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER); + + tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH); + tegra_dc_writel(dc, 0, DC_WIN_BYTE_SWAP); + + value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x); + tegra_dc_writel(dc, value, DC_WIN_POSITION); + + value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w); + tegra_dc_writel(dc, value, DC_WIN_SIZE); + + h_offset = window->src.x * bpp; + v_offset = window->src.y; + h_size = window->src.w * bpp; + v_size = window->src.h; + + value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size); + tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE); + + /* + * For DDA computations the number of bytes per pixel for YUV planar + * modes needs to take into account all Y, U and V components. + */ + if (yuv && planar) + bpp = 2; + + h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp); + v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp); + + value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda); + tegra_dc_writel(dc, value, DC_WIN_DDA_INC); + + h_dda = compute_initial_dda(window->src.x); + v_dda = compute_initial_dda(window->src.y); + + tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA); + tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA); + + tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE); + tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE); + + tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR); + + if (yuv && planar) { + tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U); + tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V); + value = window->stride[1] << 16 | window->stride[0]; + tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE); + } else { + tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE); + } + + tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET); + tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET); + + value = WIN_ENABLE; + + if (yuv) { + /* setup default colorspace conversion coefficients */ + tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF); + tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB); + tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR); + tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR); + tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG); + tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG); + tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB); + tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB); + + value |= CSC_ENABLE; + } else if (window->bits_per_pixel < 24) { + value |= COLOR_EXPAND; + } + + tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS); + + /* + * Disable blending and assume Window A is the bottom-most window, + * Window C is the top-most window and Window B is in the middle. + */ + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN); + + switch (index) { + case 0: + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY); + break; + + case 1: + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY); + break; + + case 2: + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY); + break; + } + + tegra_dc_writel(dc, WIN_A_UPDATE << index, DC_CMD_STATE_CONTROL); + tegra_dc_writel(dc, WIN_A_ACT_REQ << index, DC_CMD_STATE_CONTROL); + + return 0; +} + +unsigned int tegra_dc_format(uint32_t format) +{ + switch (format) { + case DRM_FORMAT_XBGR8888: + return WIN_COLOR_DEPTH_R8G8B8A8; + + case DRM_FORMAT_XRGB8888: + return WIN_COLOR_DEPTH_B8G8R8A8; + + case DRM_FORMAT_RGB565: + return WIN_COLOR_DEPTH_B5G6R5; + + case DRM_FORMAT_UYVY: + return WIN_COLOR_DEPTH_YCbCr422; + + case DRM_FORMAT_YUV420: + return WIN_COLOR_DEPTH_YCbCr420P; + + case DRM_FORMAT_YUV422: + return WIN_COLOR_DEPTH_YCbCr422P; + + default: + break; + } + + WARN(1, "unsupported pixel format %u, using default\n", format); + return WIN_COLOR_DEPTH_B8G8R8A8; +} + +static int tegra_crtc_mode_set(struct drm_crtc *crtc, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted, + int x, int y, struct drm_framebuffer *old_fb) +{ + struct tegra_bo *bo = tegra_fb_get_plane(crtc->fb, 0); + struct tegra_dc *dc = to_tegra_dc(crtc); + struct tegra_dc_window window; + unsigned long div, value; + int err; + + drm_vblank_pre_modeset(crtc->dev, dc->pipe); + + err = tegra_crtc_setup_clk(crtc, mode, &div); + if (err) { + dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err); + return err; + } + + /* program display mode */ + tegra_dc_set_timings(dc, mode); + + value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL; + tegra_dc_writel(dc, value, DC_DISP_DATA_ENABLE_OPTIONS); + + value = tegra_dc_readl(dc, DC_COM_PIN_OUTPUT_POLARITY(1)); + value &= ~LVS_OUTPUT_POLARITY_LOW; + value &= ~LHS_OUTPUT_POLARITY_LOW; + tegra_dc_writel(dc, value, DC_COM_PIN_OUTPUT_POLARITY(1)); + + value = DISP_DATA_FORMAT_DF1P1C | DISP_ALIGNMENT_MSB | + DISP_ORDER_RED_BLUE; + tegra_dc_writel(dc, value, DC_DISP_DISP_INTERFACE_CONTROL); + + tegra_dc_writel(dc, 0x00010001, DC_DISP_SHIFT_CLOCK_OPTIONS); + + value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1; + tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL); + + /* setup window parameters */ + memset(&window, 0, sizeof(window)); + window.src.x = 0; + window.src.y = 0; + window.src.w = mode->hdisplay; + window.src.h = mode->vdisplay; + window.dst.x = 0; + window.dst.y = 0; + window.dst.w = mode->hdisplay; + window.dst.h = mode->vdisplay; + window.format = tegra_dc_format(crtc->fb->pixel_format); + window.bits_per_pixel = crtc->fb->bits_per_pixel; + window.stride[0] = crtc->fb->pitches[0]; + window.base[0] = bo->paddr; + + err = tegra_dc_setup_window(dc, 0, &window); + if (err < 0) + dev_err(dc->dev, "failed to enable root plane\n"); + + return 0; +} + +static int tegra_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, + struct drm_framebuffer *old_fb) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + + return tegra_dc_set_base(dc, x, y, crtc->fb); +} + +static void tegra_crtc_prepare(struct drm_crtc *crtc) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + unsigned int syncpt; + unsigned long value; + + /* hardware initialization */ + tegra_periph_reset_deassert(dc->clk); + usleep_range(10000, 20000); + + if (dc->pipe) + syncpt = SYNCPT_VBLANK1; + else + syncpt = SYNCPT_VBLANK0; + + /* initialize display controller */ + tegra_dc_writel(dc, 0x00000100, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); + tegra_dc_writel(dc, 0x100 | syncpt, DC_CMD_CONT_SYNCPT_VSYNC); + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | WIN_A_OF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | + WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); + + value = PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | + PW4_ENABLE | PM0_ENABLE | PM1_ENABLE; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); + + value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); + value |= DISP_CTRL_MODE_C_DISPLAY; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); + + /* initialize timer */ + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) | + WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20); + tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY); + + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) | + WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1); + tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); + + value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); +} + +static void tegra_crtc_commit(struct drm_crtc *crtc) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + unsigned long value; + + value = GENERAL_UPDATE | WIN_A_UPDATE; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + value = GENERAL_ACT_REQ | WIN_A_ACT_REQ; + tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL); + + drm_vblank_post_modeset(crtc->dev, dc->pipe); +} + +static void tegra_crtc_load_lut(struct drm_crtc *crtc) +{ +} + +static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = { + .disable = tegra_crtc_disable, + .mode_fixup = tegra_crtc_mode_fixup, + .mode_set = tegra_crtc_mode_set, + .mode_set_base = tegra_crtc_mode_set_base, + .prepare = tegra_crtc_prepare, + .commit = tegra_crtc_commit, + .load_lut = tegra_crtc_load_lut, +}; + +static irqreturn_t tegra_dc_irq(int irq, void *data) +{ + struct tegra_dc *dc = data; + unsigned long status; + + status = tegra_dc_readl(dc, DC_CMD_INT_STATUS); + tegra_dc_writel(dc, status, DC_CMD_INT_STATUS); + + if (status & FRAME_END_INT) { + /* + dev_dbg(dc->dev, "%s(): frame end\n", __func__); + */ + } + + if (status & VBLANK_INT) { + /* + dev_dbg(dc->dev, "%s(): vertical blank\n", __func__); + */ + drm_handle_vblank(dc->base.dev, dc->pipe); + tegra_dc_finish_page_flip(dc); + } + + if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) { + /* + dev_dbg(dc->dev, "%s(): underflow\n", __func__); + */ + } + + return IRQ_HANDLED; +} + +static int tegra_dc_show_regs(struct seq_file *s, void *data) +{ + struct drm_info_node *node = s->private; + struct tegra_dc *dc = node->info_ent->data; + +#define DUMP_REG(name) \ + seq_printf(s, "%-40s %#05x %08lx\n", #name, name, \ + tegra_dc_readl(dc, name)) + + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT); + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC); + DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0); + DUMP_REG(DC_CMD_DISPLAY_COMMAND); + DUMP_REG(DC_CMD_SIGNAL_RAISE); + DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL); + DUMP_REG(DC_CMD_INT_STATUS); + DUMP_REG(DC_CMD_INT_MASK); + DUMP_REG(DC_CMD_INT_ENABLE); + DUMP_REG(DC_CMD_INT_TYPE); + DUMP_REG(DC_CMD_INT_POLARITY); + DUMP_REG(DC_CMD_SIGNAL_RAISE1); + DUMP_REG(DC_CMD_SIGNAL_RAISE2); + DUMP_REG(DC_CMD_SIGNAL_RAISE3); + DUMP_REG(DC_CMD_STATE_ACCESS); + DUMP_REG(DC_CMD_STATE_CONTROL); + DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER); + DUMP_REG(DC_CMD_REG_ACT_CONTROL); + DUMP_REG(DC_COM_CRC_CONTROL); + DUMP_REG(DC_COM_CRC_CHECKSUM); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3)); + DUMP_REG(DC_COM_PIN_INPUT_DATA(0)); + DUMP_REG(DC_COM_PIN_INPUT_DATA(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6)); + DUMP_REG(DC_COM_PIN_MISC_CONTROL); + DUMP_REG(DC_COM_PIN_PM0_CONTROL); + DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE); + DUMP_REG(DC_COM_PIN_PM1_CONTROL); + DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE); + DUMP_REG(DC_COM_SPI_CONTROL); + DUMP_REG(DC_COM_SPI_START_BYTE); + DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB); + DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD); + DUMP_REG(DC_COM_HSPI_CS_DC); + DUMP_REG(DC_COM_SCRATCH_REGISTER_A); + DUMP_REG(DC_COM_SCRATCH_REGISTER_B); + DUMP_REG(DC_COM_GPIO_CTRL); + DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER); + DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED); + DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0); + DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1); + DUMP_REG(DC_DISP_DISP_WIN_OPTIONS); + DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY); + DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); + DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS); + DUMP_REG(DC_DISP_REF_TO_SYNC); + DUMP_REG(DC_DISP_SYNC_WIDTH); + DUMP_REG(DC_DISP_BACK_PORCH); + DUMP_REG(DC_DISP_ACTIVE); + DUMP_REG(DC_DISP_FRONT_PORCH); + DUMP_REG(DC_DISP_H_PULSE0_CONTROL); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_D); + DUMP_REG(DC_DISP_H_PULSE1_CONTROL); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_D); + DUMP_REG(DC_DISP_H_PULSE2_CONTROL); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_D); + DUMP_REG(DC_DISP_V_PULSE0_CONTROL); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_B); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_C); + DUMP_REG(DC_DISP_V_PULSE1_CONTROL); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_B); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_C); + DUMP_REG(DC_DISP_V_PULSE2_CONTROL); + DUMP_REG(DC_DISP_V_PULSE2_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE3_CONTROL); + DUMP_REG(DC_DISP_V_PULSE3_POSITION_A); + DUMP_REG(DC_DISP_M0_CONTROL); + DUMP_REG(DC_DISP_M1_CONTROL); + DUMP_REG(DC_DISP_DI_CONTROL); + DUMP_REG(DC_DISP_PP_CONTROL); + DUMP_REG(DC_DISP_PP_SELECT_A); + DUMP_REG(DC_DISP_PP_SELECT_B); + DUMP_REG(DC_DISP_PP_SELECT_C); + DUMP_REG(DC_DISP_PP_SELECT_D); + DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL); + DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL); + DUMP_REG(DC_DISP_DISP_COLOR_CONTROL); + DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS); + DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS); + DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS); + DUMP_REG(DC_DISP_LCD_SPI_OPTIONS); + DUMP_REG(DC_DISP_BORDER_COLOR); + DUMP_REG(DC_DISP_COLOR_KEY0_LOWER); + DUMP_REG(DC_DISP_COLOR_KEY0_UPPER); + DUMP_REG(DC_DISP_COLOR_KEY1_LOWER); + DUMP_REG(DC_DISP_COLOR_KEY1_UPPER); + DUMP_REG(DC_DISP_CURSOR_FOREGROUND); + DUMP_REG(DC_DISP_CURSOR_BACKGROUND); + DUMP_REG(DC_DISP_CURSOR_START_ADDR); + DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS); + DUMP_REG(DC_DISP_CURSOR_POSITION); + DUMP_REG(DC_DISP_CURSOR_POSITION_NS); + DUMP_REG(DC_DISP_INIT_SEQ_CONTROL); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D); + DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL); + DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST); + DUMP_REG(DC_DISP_DAC_CRT_CTRL); + DUMP_REG(DC_DISP_DISP_MISC_CONTROL); + DUMP_REG(DC_DISP_SD_CONTROL); + DUMP_REG(DC_DISP_SD_CSC_COEFF); + DUMP_REG(DC_DISP_SD_LUT(0)); + DUMP_REG(DC_DISP_SD_LUT(1)); + DUMP_REG(DC_DISP_SD_LUT(2)); + DUMP_REG(DC_DISP_SD_LUT(3)); + DUMP_REG(DC_DISP_SD_LUT(4)); + DUMP_REG(DC_DISP_SD_LUT(5)); + DUMP_REG(DC_DISP_SD_LUT(6)); + DUMP_REG(DC_DISP_SD_LUT(7)); + DUMP_REG(DC_DISP_SD_LUT(8)); + DUMP_REG(DC_DISP_SD_FLICKER_CONTROL); + DUMP_REG(DC_DISP_DC_PIXEL_COUNT); + DUMP_REG(DC_DISP_SD_HISTOGRAM(0)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(1)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(2)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(3)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(4)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(5)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(6)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(7)); + DUMP_REG(DC_DISP_SD_BL_TF(0)); + DUMP_REG(DC_DISP_SD_BL_TF(1)); + DUMP_REG(DC_DISP_SD_BL_TF(2)); + DUMP_REG(DC_DISP_SD_BL_TF(3)); + DUMP_REG(DC_DISP_SD_BL_CONTROL); + DUMP_REG(DC_DISP_SD_HW_K_VALUES); + DUMP_REG(DC_DISP_SD_MAN_K_VALUES); + DUMP_REG(DC_WIN_WIN_OPTIONS); + DUMP_REG(DC_WIN_BYTE_SWAP); + DUMP_REG(DC_WIN_BUFFER_CONTROL); + DUMP_REG(DC_WIN_COLOR_DEPTH); + DUMP_REG(DC_WIN_POSITION); + DUMP_REG(DC_WIN_SIZE); + DUMP_REG(DC_WIN_PRESCALED_SIZE); + DUMP_REG(DC_WIN_H_INITIAL_DDA); + DUMP_REG(DC_WIN_V_INITIAL_DDA); + DUMP_REG(DC_WIN_DDA_INC); + DUMP_REG(DC_WIN_LINE_STRIDE); + DUMP_REG(DC_WIN_BUF_STRIDE); + DUMP_REG(DC_WIN_UV_BUF_STRIDE); + DUMP_REG(DC_WIN_BUFFER_ADDR_MODE); + DUMP_REG(DC_WIN_DV_CONTROL); + DUMP_REG(DC_WIN_BLEND_NOKEY); + DUMP_REG(DC_WIN_BLEND_1WIN); + DUMP_REG(DC_WIN_BLEND_2WIN_X); + DUMP_REG(DC_WIN_BLEND_2WIN_Y); + DUMP_REG(DC_WIN_BLEND_3WIN_XY); + DUMP_REG(DC_WIN_HP_FETCH_CONTROL); + DUMP_REG(DC_WINBUF_START_ADDR); + DUMP_REG(DC_WINBUF_START_ADDR_NS); + DUMP_REG(DC_WINBUF_START_ADDR_U); + DUMP_REG(DC_WINBUF_START_ADDR_U_NS); + DUMP_REG(DC_WINBUF_START_ADDR_V); + DUMP_REG(DC_WINBUF_START_ADDR_V_NS); + DUMP_REG(DC_WINBUF_ADDR_H_OFFSET); + DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS); + DUMP_REG(DC_WINBUF_ADDR_V_OFFSET); + DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS); + DUMP_REG(DC_WINBUF_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS); + +#undef DUMP_REG + + return 0; +} + +static struct drm_info_list debugfs_files[] = { + { "regs", tegra_dc_show_regs, 0, NULL }, +}; + +static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor) +{ + unsigned int i; + char *name; + int err; + + name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe); + dc->debugfs = debugfs_create_dir(name, minor->debugfs_root); + kfree(name); + + if (!dc->debugfs) + return -ENOMEM; + + dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files), + GFP_KERNEL); + if (!dc->debugfs_files) { + err = -ENOMEM; + goto remove; + } + + for (i = 0; i < ARRAY_SIZE(debugfs_files); i++) + dc->debugfs_files[i].data = dc; + + err = drm_debugfs_create_files(dc->debugfs_files, + ARRAY_SIZE(debugfs_files), + dc->debugfs, minor); + if (err < 0) + goto free; + + dc->minor = minor; + + return 0; + +free: + kfree(dc->debugfs_files); + dc->debugfs_files = NULL; +remove: + debugfs_remove(dc->debugfs); + dc->debugfs = NULL; + + return err; +} + +static int tegra_dc_debugfs_exit(struct tegra_dc *dc) +{ + drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files), + dc->minor); + dc->minor = NULL; + + kfree(dc->debugfs_files); + dc->debugfs_files = NULL; + + debugfs_remove(dc->debugfs); + dc->debugfs = NULL; + + return 0; +} + +static int tegra_dc_drm_init(struct host1x_client *client, + struct drm_device *drm) +{ + struct tegra_dc *dc = host1x_client_to_dc(client); + int err; + + dc->pipe = drm->mode_config.num_crtc; + + drm_crtc_init(drm, &dc->base, &tegra_crtc_funcs); + drm_mode_crtc_set_gamma_size(&dc->base, 256); + drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs); + + err = tegra_dc_rgb_init(drm, dc); + if (err < 0 && err != -ENODEV) { + dev_err(dc->dev, "failed to initialize RGB output: %d\n", err); + return err; + } + + err = tegra_dc_add_planes(drm, dc); + if (err < 0) + return err; + + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + err = tegra_dc_debugfs_init(dc, drm->primary); + if (err < 0) + dev_err(dc->dev, "debugfs setup failed: %d\n", err); + } + + err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0, + dev_name(dc->dev), dc); + if (err < 0) { + dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq, + err); + return err; + } + + return 0; +} + +static int tegra_dc_drm_exit(struct host1x_client *client) +{ + struct tegra_dc *dc = host1x_client_to_dc(client); + int err; + + devm_free_irq(dc->dev, dc->irq, dc); + + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + err = tegra_dc_debugfs_exit(dc); + if (err < 0) + dev_err(dc->dev, "debugfs cleanup failed: %d\n", err); + } + + err = tegra_dc_rgb_exit(dc); + if (err) { + dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err); + return err; + } + + return 0; +} + +static const struct host1x_client_ops dc_client_ops = { + .drm_init = tegra_dc_drm_init, + .drm_exit = tegra_dc_drm_exit, +}; + +static int tegra_dc_probe(struct platform_device *pdev) +{ + struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent); + struct resource *regs; + struct tegra_dc *dc; + int err; + + dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL); + if (!dc) + return -ENOMEM; + + spin_lock_init(&dc->lock); + INIT_LIST_HEAD(&dc->list); + dc->dev = &pdev->dev; + + dc->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dc->clk)) { + dev_err(&pdev->dev, "failed to get clock\n"); + return PTR_ERR(dc->clk); + } + + err = clk_prepare_enable(dc->clk); + if (err < 0) + return err; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(&pdev->dev, "failed to get registers\n"); + return -ENXIO; + } + + dc->regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(dc->regs)) + return PTR_ERR(dc->regs); + + dc->irq = platform_get_irq(pdev, 0); + if (dc->irq < 0) { + dev_err(&pdev->dev, "failed to get IRQ\n"); + return -ENXIO; + } + + INIT_LIST_HEAD(&dc->client.list); + dc->client.ops = &dc_client_ops; + dc->client.dev = &pdev->dev; + + err = tegra_dc_rgb_probe(dc); + if (err < 0 && err != -ENODEV) { + dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err); + return err; + } + + err = host1x_register_client(host1x, &dc->client); + if (err < 0) { + dev_err(&pdev->dev, "failed to register host1x client: %d\n", + err); + return err; + } + + platform_set_drvdata(pdev, dc); + + return 0; +} + +static int tegra_dc_remove(struct platform_device *pdev) +{ + struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent); + struct tegra_dc *dc = platform_get_drvdata(pdev); + int err; + + err = host1x_unregister_client(host1x, &dc->client); + if (err < 0) { + dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", + err); + return err; + } + + clk_disable_unprepare(dc->clk); + + return 0; +} + +static struct of_device_id tegra_dc_of_match[] = { + { .compatible = "nvidia,tegra30-dc", }, + { .compatible = "nvidia,tegra20-dc", }, + { }, +}; + +struct platform_driver tegra_dc_driver = { + .driver = { + .name = "tegra-dc", + .owner = THIS_MODULE, + .of_match_table = tegra_dc_of_match, + }, + .probe = tegra_dc_probe, + .remove = tegra_dc_remove, +}; |