drm/fsl-dcu: fix alpha blending
Fix alpha blending by enabling alpha blending for the whole frame if a color mode with alpha channel is selected (DRM_FORMAT_ARGB*). Also support color modes without alpha channel (DRM_FORMAT_XRGB*) by just not enabling alpha blending on layer level. Signed-off-by: Stefan Agner <stefan@agner.ch>
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@ -133,7 +133,9 @@
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#define DCU_LAYER_RLE_EN BIT(15)
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#define DCU_LAYER_RLE_EN BIT(15)
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#define DCU_LAYER_LUOFFS(x) ((x) << 4)
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#define DCU_LAYER_LUOFFS(x) ((x) << 4)
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#define DCU_LAYER_BB_ON BIT(2)
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#define DCU_LAYER_BB_ON BIT(2)
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#define DCU_LAYER_AB(x) (x)
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#define DCU_LAYER_AB_NONE 0
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#define DCU_LAYER_AB_CHROMA_KEYING 1
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#define DCU_LAYER_AB_WHOLE_FRAME 2
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#define DCU_LAYER_CKMAX_R(x) ((x) << 16)
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#define DCU_LAYER_CKMAX_R(x) ((x) << 16)
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#define DCU_LAYER_CKMAX_G(x) ((x) << 8)
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#define DCU_LAYER_CKMAX_G(x) ((x) << 8)
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@ -47,8 +47,11 @@ static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
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switch (fb->pixel_format) {
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switch (fb->pixel_format) {
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case DRM_FORMAT_RGB565:
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case DRM_FORMAT_RGB565:
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case DRM_FORMAT_RGB888:
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case DRM_FORMAT_RGB888:
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case DRM_FORMAT_XRGB8888:
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_BGRA4444:
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case DRM_FORMAT_XRGB4444:
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case DRM_FORMAT_ARGB4444:
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case DRM_FORMAT_XRGB1555:
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_YUV422:
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case DRM_FORMAT_YUV422:
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return 0;
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return 0;
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@ -81,7 +84,7 @@ static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *state = plane->state;
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struct drm_plane_state *state = plane->state;
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struct drm_framebuffer *fb = plane->state->fb;
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struct drm_framebuffer *fb = plane->state->fb;
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struct drm_gem_cma_object *gem;
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struct drm_gem_cma_object *gem;
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unsigned int alpha, bpp;
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unsigned int alpha = DCU_LAYER_AB_NONE, bpp;
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int index;
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int index;
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if (!fb)
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if (!fb)
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@ -96,27 +99,30 @@ static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
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switch (fb->pixel_format) {
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switch (fb->pixel_format) {
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case DRM_FORMAT_RGB565:
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case DRM_FORMAT_RGB565:
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bpp = FSL_DCU_RGB565;
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bpp = FSL_DCU_RGB565;
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alpha = 0xff;
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break;
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break;
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case DRM_FORMAT_RGB888:
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case DRM_FORMAT_RGB888:
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bpp = FSL_DCU_RGB888;
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bpp = FSL_DCU_RGB888;
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alpha = 0xff;
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break;
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break;
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_ARGB8888:
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alpha = DCU_LAYER_AB_WHOLE_FRAME;
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/* fall-through */
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case DRM_FORMAT_XRGB8888:
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bpp = FSL_DCU_ARGB8888;
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bpp = FSL_DCU_ARGB8888;
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alpha = 0xff;
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break;
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break;
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case DRM_FORMAT_BGRA4444:
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case DRM_FORMAT_ARGB4444:
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alpha = DCU_LAYER_AB_WHOLE_FRAME;
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/* fall-through */
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case DRM_FORMAT_XRGB4444:
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bpp = FSL_DCU_ARGB4444;
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bpp = FSL_DCU_ARGB4444;
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alpha = 0xff;
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break;
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break;
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_ARGB1555:
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alpha = DCU_LAYER_AB_WHOLE_FRAME;
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/* fall-through */
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case DRM_FORMAT_XRGB1555:
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bpp = FSL_DCU_ARGB1555;
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bpp = FSL_DCU_ARGB1555;
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alpha = 0xff;
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break;
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break;
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case DRM_FORMAT_YUV422:
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case DRM_FORMAT_YUV422:
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bpp = FSL_DCU_YUV422;
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bpp = FSL_DCU_YUV422;
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alpha = 0xff;
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break;
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break;
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default:
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default:
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return;
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return;
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@ -132,9 +138,9 @@ static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
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DCU_CTRLDESCLN(index, 3), gem->paddr);
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DCU_CTRLDESCLN(index, 3), gem->paddr);
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regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
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regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
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DCU_LAYER_EN |
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DCU_LAYER_EN |
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DCU_LAYER_TRANS(alpha) |
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DCU_LAYER_TRANS(0xff) |
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DCU_LAYER_BPP(bpp) |
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DCU_LAYER_BPP(bpp) |
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DCU_LAYER_AB(0));
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alpha);
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regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
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regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
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DCU_LAYER_CKMAX_R(0xFF) |
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DCU_LAYER_CKMAX_R(0xFF) |
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DCU_LAYER_CKMAX_G(0xFF) |
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DCU_LAYER_CKMAX_G(0xFF) |
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@ -202,8 +208,11 @@ static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
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static const u32 fsl_dcu_drm_plane_formats[] = {
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static const u32 fsl_dcu_drm_plane_formats[] = {
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DRM_FORMAT_RGB565,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_XRGB4444,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_XRGB1555,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_YUV422,
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DRM_FORMAT_YUV422,
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};
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};
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