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authorVinod Koul <[email protected]>2022-04-06 15:10:27 +0530
committerDmitry Baryshkov <[email protected]>2022-04-26 00:56:22 +0300
commit7e9cc175b159c49cab8805aec70a88314c2b40ed (patch)
tree5e596d609f863dd017cc391ae6a6854f1b220d7a
parent1d6fe0b7e657a51cfd8a681822362fbb990738fc (diff)
drm/msm/disp/dpu1: Add support for DSC in topology
For DSC to work we typically need a 2,2,1 configuration. This should suffice for resolutions up to 4k. For more resolutions like 8k this won't work. Also, it is better to use 2 LMs and DSC instances as half width results in lesser power consumption as compared to single LM, DSC at full width. The panel has been tested only with 2,2,1 configuration, so for now we blindly create 2,2,1 topology when DSC is enabled Co-developed-by: Abhinav Kumar <[email protected]> Signed-off-by: Abhinav Kumar <[email protected]> Reviewed-by: Dmitry Baryshkov <[email protected]> Signed-off-by: Vinod Koul <[email protected]> Patchwork: https://patchwork.freedesktop.org/patch/480925/ Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Dmitry Baryshkov <[email protected]>
-rw-r--r--drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c13
-rw-r--r--drivers/gpu/drm/msm/msm_drv.h2
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 41bb77f6d1e3..dcca7afd58de 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -577,8 +577,21 @@ static struct msm_display_topology dpu_encoder_get_topology(
topology.num_enc = 0;
topology.num_intf = intf_count;
+ if (dpu_enc->dsc) {
+ /* In case of Display Stream Compression (DSC), we would use
+ * 2 encoders, 2 layer mixers and 1 interface
+ * this is power optimal and can drive up to (including) 4k
+ * screens
+ */
+ topology.num_enc = 2;
+ topology.num_dsc = 2;
+ topology.num_intf = 1;
+ topology.num_lm = 2;
+ }
+
return topology;
}
+
static int dpu_encoder_virt_atomic_check(
struct drm_encoder *drm_enc,
struct drm_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 3db3f1e06306..0eb6890aa156 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -93,12 +93,14 @@ enum msm_event_wait {
* @num_enc: number of compression encoder blocks used
* @num_intf: number of interfaces the panel is mounted on
* @num_dspp: number of dspp blocks used
+ * @num_dsc: number of Display Stream Compression (DSC) blocks used
*/
struct msm_display_topology {
u32 num_lm;
u32 num_enc;
u32 num_intf;
u32 num_dspp;
+ u32 num_dsc;
};
/* Commit/Event thread specific structure */