[PATCH 3/3] drm/exynos: mixer: Make plane alpha configurable
From: Christoph Manszewski
Date: Fri Sep 21 2018 - 08:26:25 EST
The mixer hardware supports variable plane alpha. Currently planes are
opaque, make this configurable.
Tested on Odroid-U3 with Exynos 4412 CPU, kernel next-20180913
using modetest.
Signed-off-by: Christoph Manszewski <c.manszewski@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_drv.h | 1 +
drivers/gpu/drm/exynos/exynos_drm_plane.c | 3 +++
drivers/gpu/drm/exynos/exynos_mixer.c | 37 ++++++++++++++++++-------------
drivers/gpu/drm/exynos/regs-mixer.h | 5 ++++-
4 files changed, 30 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 1cb26d8c66f9..ec1d5bcac61a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -93,6 +93,7 @@ struct exynos_drm_plane {
#define EXYNOS_DRM_PLANE_CAP_ZPOS (1 << 2)
#define EXYNOS_DRM_PLANE_CAP_TILE (1 << 3)
#define EXYNOS_DRM_PLANE_CAP_PIX_BLEND (1 << 4)
+#define EXYNOS_DRM_PLANE_CAP_WIN_BLEND (1 << 5)
/*
* Exynos DRM plane configuration structure.
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index 236408906f1f..df0508e0e49e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -325,5 +325,8 @@ int exynos_plane_init(struct drm_device *dev,
if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND)
drm_plane_create_blend_mode_property(plane, supported_modes);
+ if (config->capabilities & EXYNOS_DRM_PLANE_CAP_WIN_BLEND)
+ drm_plane_create_alpha_property(plane);
+
return 0;
}
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 721b63e92b28..e3a4ecbc503b 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -132,7 +132,8 @@ static const struct exynos_drm_plane_config plane_configs[MIXER_WIN_NR] = {
.num_pixel_formats = ARRAY_SIZE(mixer_formats),
.capabilities = EXYNOS_DRM_PLANE_CAP_DOUBLE |
EXYNOS_DRM_PLANE_CAP_ZPOS |
- EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
+ EXYNOS_DRM_PLANE_CAP_PIX_BLEND |
+ EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
}, {
.zpos = 1,
.type = DRM_PLANE_TYPE_CURSOR,
@@ -140,7 +141,8 @@ static const struct exynos_drm_plane_config plane_configs[MIXER_WIN_NR] = {
.num_pixel_formats = ARRAY_SIZE(mixer_formats),
.capabilities = EXYNOS_DRM_PLANE_CAP_DOUBLE |
EXYNOS_DRM_PLANE_CAP_ZPOS |
- EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
+ EXYNOS_DRM_PLANE_CAP_PIX_BLEND |
+ EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
}, {
.zpos = 2,
.type = DRM_PLANE_TYPE_OVERLAY,
@@ -148,7 +150,8 @@ static const struct exynos_drm_plane_config plane_configs[MIXER_WIN_NR] = {
.num_pixel_formats = ARRAY_SIZE(vp_formats),
.capabilities = EXYNOS_DRM_PLANE_CAP_SCALE |
EXYNOS_DRM_PLANE_CAP_ZPOS |
- EXYNOS_DRM_PLANE_CAP_TILE,
+ EXYNOS_DRM_PLANE_CAP_TILE |
+ EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
},
};
@@ -311,8 +314,9 @@ static void vp_default_filter(struct mixer_context *ctx)
}
static void mixer_cfg_gfx_blend(struct mixer_context *ctx, unsigned int win,
- unsigned int pixel_alpha)
+ unsigned int pixel_alpha, unsigned int alpha)
{
+ u32 win_alpha = alpha >> 8;
u32 val;
val = MXR_GRP_CFG_COLOR_KEY_DISABLE; /* no blank key */
@@ -328,21 +332,24 @@ static void mixer_cfg_gfx_blend(struct mixer_context *ctx, unsigned int win,
val |= MXR_GRP_CFG_PIXEL_BLEND_EN;
break;
}
+
+ if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
+ val |= MXR_GRP_CFG_WIN_BLEND_EN;
+ val |= win_alpha;
+ }
mixer_reg_writemask(ctx, MXR_GRAPHIC_CFG(win),
val, MXR_GRP_CFG_MISC_MASK);
}
-static void mixer_cfg_vp_blend(struct mixer_context *ctx)
+static void mixer_cfg_vp_blend(struct mixer_context *ctx, unsigned int alpha)
{
- u32 val;
+ u32 win_alpha = alpha >> 8;
+ u32 val = 0;
- /*
- * No blending at the moment since the NV12/NV21 pixelformats don't
- * have an alpha channel. However the mixer supports a global alpha
- * value for a layer. Once this functionality is exposed, we can
- * support blending of the video layer through this.
- */
- val = 0;
+ if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
+ val |= MXR_VID_CFG_BLEND_EN;
+ val |= win_alpha;
+ }
mixer_reg_write(ctx, MXR_VIDEO_CFG, val);
}
@@ -538,7 +545,7 @@ static void vp_video_buffer(struct mixer_context *ctx,
vp_reg_write(ctx, VP_BOT_C_PTR, chroma_addr[1]);
mixer_cfg_layer(ctx, plane->index, priority, true);
- mixer_cfg_vp_blend(ctx);
+ mixer_cfg_vp_blend(ctx, state->base.alpha);
spin_unlock_irqrestore(&ctx->reg_slock, flags);
@@ -631,7 +638,7 @@ static void mixer_graph_buffer(struct mixer_context *ctx,
mixer_reg_write(ctx, MXR_GRAPHIC_BASE(win), dma_addr);
mixer_cfg_layer(ctx, win, priority, true);
- mixer_cfg_gfx_blend(ctx, win, pixel_alpha);
+ mixer_cfg_gfx_blend(ctx, win, pixel_alpha, state->base.alpha);
/* layer update mandatory for mixer 16.0.33.0 */
if (ctx->mxr_ver == MXR_VER_16_0_33_0 ||
diff --git a/drivers/gpu/drm/exynos/regs-mixer.h b/drivers/gpu/drm/exynos/regs-mixer.h
index 189cfa2470a8..d2b8194a07bf 100644
--- a/drivers/gpu/drm/exynos/regs-mixer.h
+++ b/drivers/gpu/drm/exynos/regs-mixer.h
@@ -109,12 +109,15 @@
#define MXR_CFG_SCAN_HD (1 << 0)
#define MXR_CFG_SCAN_MASK 0x47
+/* bits for MXR_VIDEO_CFG */
+#define MXR_VID_CFG_BLEND_EN (1 << 16)
+
/* bits for MXR_GRAPHICn_CFG */
#define MXR_GRP_CFG_COLOR_KEY_DISABLE (1 << 21)
#define MXR_GRP_CFG_BLEND_PRE_MUL (1 << 20)
#define MXR_GRP_CFG_WIN_BLEND_EN (1 << 17)
#define MXR_GRP_CFG_PIXEL_BLEND_EN (1 << 16)
-#define MXR_GRP_CFG_MISC_MASK ((3 << 16) | (3 << 20))
+#define MXR_GRP_CFG_MISC_MASK ((3 << 16) | (3 << 20) | 0xff)
#define MXR_GRP_CFG_FORMAT_VAL(x) MXR_MASK_VAL(x, 11, 8)
#define MXR_GRP_CFG_FORMAT_MASK MXR_GRP_CFG_FORMAT_VAL(~0)
#define MXR_GRP_CFG_ALPHA_VAL(x) MXR_MASK_VAL(x, 7, 0)
--
2.7.4