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| author | Philippe CORNU <philippe.cornu@st.com> | 2018-02-01 11:42:42 +0100 |
|---|---|---|
| committer | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2018-02-08 10:23:22 +0100 |
| commit | aefa830199c3d07e198d44f55aa781f119937854 (patch) | |
| tree | bade09612bd3ed690911fd5c853a88b560f745a4 /drivers/gpu/drm/stm | |
| parent | f03e19579c501accb26f273883962c29d11e977e (diff) | |
| download | linux-aefa830199c3d07e198d44f55aa781f119937854.tar.gz linux-aefa830199c3d07e198d44f55aa781f119937854.tar.bz2 linux-aefa830199c3d07e198d44f55aa781f119937854.zip | |
drm/stm: ltdc: add non-alpha color formats
ltdc supports natively some color formats with alpha (like
ARGB8888, ARGB1555, ARGB4444...). Related non-alpha formats are
supported too (ARGB8888->XRGB8888, ARGB4444->XRGB4444...) by
adjusting ltdc blending factors.
Note: Wayland/Weston requests by default the non-alpha XRGB8888
color format.
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Reviewed-by: Yannick Fertré <yannick.fertre@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180201104243.20726-2-philippe.cornu@st.com
Diffstat (limited to 'drivers/gpu/drm/stm')
| -rw-r--r-- | drivers/gpu/drm/stm/ltdc.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 90b3de516c91..f6f26fc0ae9e 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -328,6 +328,26 @@ static inline u32 to_drm_pixelformat(enum ltdc_pix_fmt pf) } } +static inline u32 get_pixelformat_without_alpha(u32 drm) +{ + switch (drm) { + case DRM_FORMAT_ARGB4444: + return DRM_FORMAT_XRGB4444; + case DRM_FORMAT_RGBA4444: + return DRM_FORMAT_RGBX4444; + case DRM_FORMAT_ARGB1555: + return DRM_FORMAT_XRGB1555; + case DRM_FORMAT_RGBA5551: + return DRM_FORMAT_RGBX5551; + case DRM_FORMAT_ARGB8888: + return DRM_FORMAT_XRGB8888; + case DRM_FORMAT_RGBA8888: + return DRM_FORMAT_RGBX8888; + default: + return 0; + } +} + static irqreturn_t ltdc_irq_thread(int irq, void *arg) { struct drm_device *ddev = arg; @@ -680,6 +700,9 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane, /* Specifies the blending factors */ val = BF1_PAXCA | BF2_1PAXCA; + if (!fb->format->has_alpha) + val = BF1_CA | BF2_1CA; + reg_update_bits(ldev->regs, LTDC_L1BFCR + lofs, LXBFCR_BF2 | LXBFCR_BF1, val); @@ -747,8 +770,8 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev, struct device *dev = ddev->dev; struct drm_plane *plane; unsigned int i, nb_fmt = 0; - u32 formats[NB_PF]; - u32 drm_fmt; + u32 formats[NB_PF * 2]; + u32 drm_fmt, drm_fmt_no_alpha; int ret; /* Get supported pixel formats */ @@ -757,6 +780,12 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev, if (!drm_fmt) continue; formats[nb_fmt++] = drm_fmt; + + /* Add the no-alpha related format if any & supported */ + drm_fmt_no_alpha = get_pixelformat_without_alpha(drm_fmt); + if (!drm_fmt_no_alpha) + continue; + formats[nb_fmt++] = drm_fmt_no_alpha; } plane = devm_kzalloc(dev, sizeof(*plane), GFP_KERNEL); |