linux-kernel - [PATCH 0/3] Add support for databus widen mode

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Message-ID: <20230525-add-widebus-support-v1-0-c7069f2efca1@quicinc.com>
Date:   Tue, 13 Jun 2023 18:57:10 -0700
From:   Jessica Zhang <quic_jesszhan@...cinc.com>
To:     Rob Clark <robdclark@...il.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:     Jessica Zhang <quic_jesszhan@...cinc.com>,
        <quic_abhinavk@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/3] Add support for databus widen mode

DPU 5.x+ and DSI 6G 2.5.x+ support a databus-widen mode that allows for
more compressed data to be transferred per pclk.

This series adds support for enabling this feature for both DPU and DSI
by doing the following:

1. Add a DPU_INTF_DATABUS_WIDEN feature flag
2. Add a DPU INTF op to set the DATABUS_WIDEN register
3. Set the DATABUS_WIDEN register and do the proper hdisplay
   calculations in DSI when applicable

Note: This series will only enable the databus-widen mode for command
mode as we are currently unable to validate it on video mode.

Depends on: "Add DSC v1.2 Support for DSI" [1]

[1] https://patchwork.freedesktop.org/series/117219/

Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
Jessica Zhang (3):
      drm/msm/dpu: Add DPU_INTF_DATABUS_WIDEN feature flag for DPU >= 5.0
      drm/msm/dpu: Set DATABUS_WIDEN on command mode encoders
      drm/msm/dsi: Enable DATABUS_WIDEN for DSI command mode

 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |  3 +++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c       |  3 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h       |  2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          | 12 ++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  3 +++
 drivers/gpu/drm/msm/dsi/dsi.xml.h                    |  1 +
 drivers/gpu/drm/msm/dsi/dsi_host.c                   | 19 ++++++++++++++++++-
 7 files changed, 41 insertions(+), 2 deletions(-)
---
base-commit: 1981c2c0c05f5d7fe4d4552d4f352cb46840e51e
change-id: 20230525-add-widebus-support-f785546ee751

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