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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2015-12-16 15:21:46 +0300 |
|---|---|---|
| committer | Inki Dae <daeinki@gmail.com> | 2016-01-12 18:16:36 +0300 |
| commit | f657a9962070ae2502fcedf2c6568c393039d4c2 (patch) | |
| tree | 70245dd4dcdc29e52a54fa5fa71e16ccf20113a2 /drivers/gpu/drm/exynos/exynos_mixer.c | |
| parent | 5bec01934a23bccfeaa22bf049af134ea80bd3b4 (diff) | |
| download | linux-f657a9962070ae2502fcedf2c6568c393039d4c2.tar.xz | |
drm/exynos: mixer: refactor layer setup
Properly configure blending properties of given hardware layer based on
the selected pixel format. Currently only per-pixel-based alpha is possible
when respective pixel format has been selected. Configuration of global,
per-plane alpha value, color key and background color will be added later.
This patch is heavily inspired by earlier work done by Tobias Jakobi
<tjakobi@math.uni-bielefeld.de>.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_mixer.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_mixer.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index c572e271579e..ae7b122274ac 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -165,6 +165,16 @@ static const u8 filter_cr_horiz_tap4[] = { 70, 59, 48, 37, 27, 19, 11, 5, }; +static inline bool is_alpha_format(unsigned int pixel_format) +{ + switch (pixel_format) { + case DRM_FORMAT_ARGB8888: + return true; + default: + return false; + } +} + static inline u32 vp_reg_read(struct mixer_resources *res, u32 reg_id) { return readl(res->vp_regs + reg_id); @@ -294,6 +304,37 @@ static void vp_default_filter(struct mixer_resources *res) filter_cr_horiz_tap4, sizeof(filter_cr_horiz_tap4)); } +static void mixer_cfg_gfx_blend(struct mixer_context *ctx, unsigned int win, + bool alpha) +{ + struct mixer_resources *res = &ctx->mixer_res; + u32 val; + + val = MXR_GRP_CFG_COLOR_KEY_DISABLE; /* no blank key */ + if (alpha) { + /* blending based on pixel alpha */ + val |= MXR_GRP_CFG_BLEND_PRE_MUL; + val |= MXR_GRP_CFG_PIXEL_BLEND_EN; + } + mixer_reg_writemask(res, MXR_GRAPHIC_CFG(win), + val, MXR_GRP_CFG_MISC_MASK); +} + +static void mixer_cfg_vp_blend(struct mixer_context *ctx) +{ + struct mixer_resources *res = &ctx->mixer_res; + u32 val; + + /* + * 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; + mixer_reg_write(res, MXR_VIDEO_CFG, val); +} + static void mixer_vsync_set_update(struct mixer_context *ctx, bool enable) { struct mixer_resources *res = &ctx->mixer_res; @@ -519,6 +560,7 @@ static void vp_video_buffer(struct mixer_context *ctx, mixer_cfg_scan(ctx, mode->vdisplay); mixer_cfg_rgb_fmt(ctx, mode->vdisplay); mixer_cfg_layer(ctx, plane->index, state->zpos + 1, true); + mixer_cfg_vp_blend(ctx); mixer_run(ctx); mixer_vsync_set_update(ctx, true); @@ -634,6 +676,7 @@ static void mixer_graph_buffer(struct mixer_context *ctx, mixer_cfg_scan(ctx, mode->vdisplay); mixer_cfg_rgb_fmt(ctx, mode->vdisplay); mixer_cfg_layer(ctx, win, state->zpos + 1, true); + mixer_cfg_gfx_blend(ctx, win, is_alpha_format(fb->pixel_format)); /* layer update mandatory for mixer 16.0.33.0 */ if (ctx->mxr_ver == MXR_VER_16_0_33_0 || |