diff options
Diffstat (limited to 'drivers/gpu/drm/tilcdc/tilcdc_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 122 |
1 files changed, 104 insertions, 18 deletions
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c index 5dd3c7d031d5..7418dcd986d3 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c @@ -42,7 +42,8 @@ struct tilcdc_crtc { static void unref_worker(struct work_struct *work) { - struct tilcdc_crtc *tilcdc_crtc = container_of(work, struct tilcdc_crtc, work); + struct tilcdc_crtc *tilcdc_crtc = + container_of(work, struct tilcdc_crtc, work); struct drm_device *dev = tilcdc_crtc->base.dev; struct drm_framebuffer *fb; @@ -55,10 +56,12 @@ static void unref_worker(struct work_struct *work) static void set_scanout(struct drm_crtc *crtc, int n) { static const uint32_t base_reg[] = { - LCDC_DMA_FB_BASE_ADDR_0_REG, LCDC_DMA_FB_BASE_ADDR_1_REG, + LCDC_DMA_FB_BASE_ADDR_0_REG, + LCDC_DMA_FB_BASE_ADDR_1_REG, }; static const uint32_t ceil_reg[] = { - LCDC_DMA_FB_CEILING_ADDR_0_REG, LCDC_DMA_FB_CEILING_ADDR_1_REG, + LCDC_DMA_FB_CEILING_ADDR_0_REG, + LCDC_DMA_FB_CEILING_ADDR_1_REG, }; static const uint32_t stat[] = { LCDC_END_OF_FRAME0, LCDC_END_OF_FRAME1, @@ -194,7 +197,8 @@ static void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode) tilcdc_crtc->frame_done = false; stop(crtc); - /* if necessary wait for framedone irq which will still come + /* + * if necessary wait for framedone irq which will still come * before putting things to sleep.. */ if (priv->rev == 2) { @@ -289,17 +293,24 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc, reg = tilcdc_read(dev, LCDC_RASTER_TIMING_2_REG) & ~0x000fff00; reg |= LCDC_AC_BIAS_FREQUENCY(info->ac_bias) | LCDC_AC_BIAS_TRANSITIONS_PER_INT(info->ac_bias_intrpt); + + /* + * subtract one from hfp, hbp, hsw because the hardware uses + * a value of 0 as 1 + */ if (priv->rev == 2) { - reg |= (hfp & 0x300) >> 8; - reg |= (hbp & 0x300) >> 4; - reg |= (hsw & 0x3c0) << 21; + /* clear bits we're going to set */ + reg &= ~0x78000033; + reg |= ((hfp-1) & 0x300) >> 8; + reg |= ((hbp-1) & 0x300) >> 4; + reg |= ((hsw-1) & 0x3c0) << 21; } tilcdc_write(dev, LCDC_RASTER_TIMING_2_REG, reg); reg = (((mode->hdisplay >> 4) - 1) << 4) | - ((hbp & 0xff) << 24) | - ((hfp & 0xff) << 16) | - ((hsw & 0x3f) << 10); + (((hbp-1) & 0xff) << 24) | + (((hfp-1) & 0xff) << 16) | + (((hsw-1) & 0x3f) << 10); if (priv->rev == 2) reg |= (((mode->hdisplay >> 4) - 1) & 0x40) >> 3; tilcdc_write(dev, LCDC_RASTER_TIMING_0_REG, reg); @@ -307,9 +318,24 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc, reg = ((mode->vdisplay - 1) & 0x3ff) | ((vbp & 0xff) << 24) | ((vfp & 0xff) << 16) | - ((vsw & 0x3f) << 10); + (((vsw-1) & 0x3f) << 10); tilcdc_write(dev, LCDC_RASTER_TIMING_1_REG, reg); + /* + * be sure to set Bit 10 for the V2 LCDC controller, + * otherwise limited to 1024 pixels width, stopping + * 1920x1080 being suppoted. + */ + if (priv->rev == 2) { + if ((mode->vdisplay - 1) & 0x400) { + tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, + LCDC_LPP_B10); + } else { + tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, + LCDC_LPP_B10); + } + } + /* Configure display type: */ reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG) & ~(LCDC_TFT_MODE | LCDC_MONO_8BIT_MODE | LCDC_MONOCHROME_MODE | @@ -384,10 +410,6 @@ static int tilcdc_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, return 0; } -static void tilcdc_crtc_load_lut(struct drm_crtc *crtc) -{ -} - static const struct drm_crtc_funcs tilcdc_crtc_funcs = { .destroy = tilcdc_crtc_destroy, .set_config = drm_crtc_helper_set_config, @@ -401,7 +423,6 @@ static const struct drm_crtc_helper_funcs tilcdc_crtc_helper_funcs = { .commit = tilcdc_crtc_commit, .mode_set = tilcdc_crtc_mode_set, .mode_set_base = tilcdc_crtc_mode_set_base, - .load_lut = tilcdc_crtc_load_lut, }; int tilcdc_crtc_max_width(struct drm_crtc *crtc) @@ -422,7 +443,12 @@ int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode) { struct tilcdc_drm_private *priv = crtc->dev->dev_private; unsigned int bandwidth; + uint32_t hbp, hfp, hsw, vbp, vfp, vsw; + /* + * check to see if the width is within the range that + * the LCD Controller physically supports + */ if (mode->hdisplay > tilcdc_crtc_max_width(crtc)) return MODE_VIRTUAL_X; @@ -433,10 +459,70 @@ int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode) if (mode->vdisplay > 2048) return MODE_VIRTUAL_Y; + DBG("Processing mode %dx%d@%d with pixel clock %d", + mode->hdisplay, mode->vdisplay, + drm_mode_vrefresh(mode), mode->clock); + + hbp = mode->htotal - mode->hsync_end; + hfp = mode->hsync_start - mode->hdisplay; + hsw = mode->hsync_end - mode->hsync_start; + vbp = mode->vtotal - mode->vsync_end; + vfp = mode->vsync_start - mode->vdisplay; + vsw = mode->vsync_end - mode->vsync_start; + + if ((hbp-1) & ~0x3ff) { + DBG("Pruning mode: Horizontal Back Porch out of range"); + return MODE_HBLANK_WIDE; + } + + if ((hfp-1) & ~0x3ff) { + DBG("Pruning mode: Horizontal Front Porch out of range"); + return MODE_HBLANK_WIDE; + } + + if ((hsw-1) & ~0x3ff) { + DBG("Pruning mode: Horizontal Sync Width out of range"); + return MODE_HSYNC_WIDE; + } + + if (vbp & ~0xff) { + DBG("Pruning mode: Vertical Back Porch out of range"); + return MODE_VBLANK_WIDE; + } + + if (vfp & ~0xff) { + DBG("Pruning mode: Vertical Front Porch out of range"); + return MODE_VBLANK_WIDE; + } + + if ((vsw-1) & ~0x3f) { + DBG("Pruning mode: Vertical Sync Width out of range"); + return MODE_VSYNC_WIDE; + } + + /* + * some devices have a maximum allowed pixel clock + * configured from the DT + */ + if (mode->clock > priv->max_pixelclock) { + DBG("Pruning mode: pixel clock too high"); + return MODE_CLOCK_HIGH; + } + + /* + * some devices further limit the max horizontal resolution + * configured from the DT + */ + if (mode->hdisplay > priv->max_width) + return MODE_BAD_WIDTH; + /* filter out modes that would require too much memory bandwidth: */ - bandwidth = mode->hdisplay * mode->vdisplay * drm_mode_vrefresh(mode); - if (bandwidth > priv->max_bandwidth) + bandwidth = mode->hdisplay * mode->vdisplay * + drm_mode_vrefresh(mode); + if (bandwidth > priv->max_bandwidth) { + DBG("Pruning mode: exceeds defined bandwidth limit"); return MODE_BAD; + } return MODE_OK; } |