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path: root/drivers/gpu/drm/stm/ltdc.c
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Diffstat (limited to 'drivers/gpu/drm/stm/ltdc.c')
-rw-r--r--drivers/gpu/drm/stm/ltdc.c33
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);