First step in allowing a more generic way to setup complex
blending for the different layers.
Signed-off-by: Tobias Jakobi <tjak...@math.uni-bielefeld.de>
---
drivers/gpu/drm/exynos/exynos_mixer.c | 90 ++++++++++++++++++++++++++++++-----
1 file changed, 79 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c
b/drivers/gpu/drm/exynos/exynos_mixer.c
index 4a1656b..e4a5e76 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -63,6 +63,11 @@ struct mixer_resources {
struct clk *mout_mixer;
};
+struct layer_config {
+ unsigned int index;
+ unsigned int priority;
+};
+
enum mixer_version_id {
MXR_VER_0_0_0_16,
MXR_VER_16_0_33_0,
@@ -75,6 +80,8 @@ struct mixer_context {
struct drm_device *drm_dev;
struct exynos_drm_crtc *crtc;
struct exynos_drm_plane planes[MIXER_WIN_NR];
+ const struct layer_config *layer_config;
+ unsigned int num_layer;
int pipe;
bool interlace;
bool powered;
@@ -95,6 +102,40 @@ struct mixer_drv_data {
bool has_sclk;
};
+/*
+ * The default layer priorities. A higher priority means that
+ * the layer is at the top of layer stack.
+ * The current configuration assumes the following usage scenario:
+ * layer1: OSD [top]
+ * layer0: main framebuffer
+ * video layer: video overlay [bottom]
+ * Note that the video layer is only usable when the
+ * video processor is available.
+ */
+
+static const struct layer_config default_layer_config[] = {
+ {
+ .index = 0, /* layer0 */
+ .priority = 1
+ }, {
+ .index = 1, /* layer1 */
+ .priority = 2
+ }
+};
+
+static const struct layer_config vp_layer_config[] = {
+ {
+ .index = 2, /* video layer */
+ .priority = 1
+ }, {
+ .index = 0, /* layer0 */
+ .priority = 2
+ }, {
+ .index = 1, /* layer1 */
+ .priority = 3
+ }
+};
+
static const u8 filter_y_horiz_tap8[] = {
0, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, 0, 0, 0,
@@ -253,6 +294,34 @@ static void vp_default_filter(struct mixer_resources *res)
filter_cr_horiz_tap4, sizeof(filter_cr_horiz_tap4));
}
+static void mixer_layer_priority(struct mixer_context *ctx)
+{
+ u32 val = 0;
+ unsigned int i, priority;
+
+ for (i = 0; i < ctx->num_layer; ++i) {
+ priority = ctx->layer_config[i].priority;
+ BUG_ON(priority > 15);
+
+ switch (ctx->layer_config[i].index) {
+ case 0:
+ val |= MXR_LAYER_CFG_GRP0_VAL(priority);
+ break;
+ case 1:
+ val |= MXR_LAYER_CFG_GRP1_VAL(priority);
+ break;
+ case 2:
+ val |= MXR_LAYER_CFG_VP_VAL(priority);
+ break;
+ default:
+ BUG_ON(true);
+ break;
+ }
+ }
+
+ mixer_reg_write(&ctx->mixer_res, MXR_LAYER_CFG, val);
+}
+
static void mixer_vsync_set_update(struct mixer_context *ctx, bool enable)
{
struct mixer_resources *res = &ctx->mixer_res;
@@ -654,17 +723,7 @@ static void mixer_win_reset(struct mixer_context *ctx)
mixer_reg_writemask(res, MXR_STATUS, MXR_STATUS_16_BURST,
MXR_STATUS_BURST_MASK);
- /* setting default layer priority: layer1 > layer0 > video
- * because typical usage scenario would be
- * layer1 - OSD
- * layer0 - framebuffer
- * video - video overlay
- */
- val = MXR_LAYER_CFG_GRP1_VAL(3);
- val |= MXR_LAYER_CFG_GRP0_VAL(2);
- if (ctx->vp_enabled)
- val |= MXR_LAYER_CFG_VP_VAL(1);
- mixer_reg_write(res, MXR_LAYER_CFG, val);
+ mixer_layer_priority(ctx);
/* setting background color */
mixer_reg_write(res, MXR_BG_COLOR0, 0x008080);
@@ -1274,6 +1333,15 @@ static int mixer_probe(struct platform_device *pdev)
ctx->vp_enabled = drv->is_vp_enabled;
ctx->has_sclk = drv->has_sclk;
ctx->mxr_ver = drv->version;
+
+ if (drv->is_vp_enabled) {
+ ctx->layer_config = vp_layer_config;
+ ctx->num_layer = ARRAY_SIZE(vp_layer_config);
+ } else {
+ ctx->layer_config = default_layer_config;
+ ctx->num_layer = ARRAY_SIZE(default_layer_config);
+ }
+
init_waitqueue_head(&ctx->wait_vsync_queue);
atomic_set(&ctx->wait_vsync_event, 0);
--
2.0.5
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