linux-kernel - [PATCH v2 0/4] Add DSC v1.2 Support for DSI

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Date:   Fri, 5 May 2023 14:23:47 -0700
From:   Jessica Zhang <quic_jesszhan@...cinc.com>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Marijn Suijten <marijn.suijten@...ainline.org>
CC:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Jessica Zhang <quic_jesszhan@...cinc.com>
Subject: [PATCH v2 0/4] Add DSC v1.2 Support for DSI

This is a series of changes for DSI to enable command mode support
for DSC v1.2.

This includes:

1) Adjusting pclk_rate to account for compression
2) Fixing the word count calculation for DSC
3) Setting the DATA_COMPRESS bit when DSC is enabled

With these changes (and the dependency below), DSC v1.2 should work over
DSI in command mode.

Note: Changes that add DSC v1.2 support for video mode will be posted
with the DP support changes.

Depends-on: "add DSC 1.2 dpu supports" [1] and "Introduce MSM-specific
DSC helpers" [2]

[1] https://patchwork.freedesktop.org/series/116789/
[2] https://patchwork.freedesktop.org/series/115833/

Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
Changes in v2:
- Changed pclk math to only divide hdisplay by compression ratio
- Reworded word count TODO comment
- Make DATA_COMPRESS an INTF flag
- Read INTF_CFG2 before setting DATA_COMRPESS register
- Reworded commit messages and cover letter for clarity
- Link to v1: https://lore.kernel.org/r/20230405-add-dsc-support-v1-0-6bc6f03ae735@quicinc.com

---
Jessica Zhang (4):
      drm/msm/dsi: Adjust pclk rate for compression
      drm/msm/dsi: Fix compressed word count calculation
      drm/msm/dpu: Add DPU_INTF_DATA_COMPRESS feature flag
      drm/msm/dpu: Set DATA_COMPRESS for command mode

 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c   |  3 +++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c     |  2 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h     |  2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c        | 11 +++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h        |  2 ++
 drivers/gpu/drm/msm/dsi/dsi_host.c                 | 26 +++++++++++++++++-----
 6 files changed, 40 insertions(+), 6 deletions(-)
---
base-commit: 70e08302e024bfac485b12972099237f7f39d829
change-id: 20230405-add-dsc-support-fe130ba49841

Best regards,
-- 
Jessica Zhang <quic_jesszhan@...cinc.com>