From: Vinod Koul Date: Wed, 6 Apr 2022 09:40:27 +0000 (+0530) Subject: drm/msm/disp/dpu1: Add support for DSC in topology X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7e9cc175b159c49cab8805aec70a88314c2b40ed;p=linux.git 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 Signed-off-by: Abhinav Kumar Reviewed-by: Dmitry Baryshkov Signed-off-by: Vinod Koul Patchwork: https://patchwork.freedesktop.org/patch/480925/ Link: https://lore.kernel.org/r/20220406094031.1027376-11-vkoul@kernel.org Signed-off-by: Dmitry Baryshkov --- diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 41bb77f6d1e31..dcca7afd58de5 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 3db3f1e063069..0eb6890aa156f 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 */