linux-kernel - [PATCH v4 0/4] drm/panel: add support for LG SW43408 panel

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Message-Id: <20240403-lg-sw43408-panel-v4-0-a386d5d3b0c6@linaro.org>
Date: Wed, 03 Apr 2024 06:43:54 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Sumit Semwal <sumit.semwal@...aro.org>, 
 Caleb Connolly <caleb.connolly@...aro.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 Vinod Koul <vkoul@...nel.org>, Caleb Connolly <caleb@...nolly.tech>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 Marijn Suijten <marijn.suijten@...ainline.org>
Subject: [PATCH v4 0/4] drm/panel: add support for LG SW43408 panel

The LG SW43408 panel is used on Google Pixel3 devices. For a long time
we could not submit the driver, as the panel was not coming up from the
reset. The panel seems to be picky about some of the delays during init
and it also uses non-standard payload for MIPI_DSI_COMPRESSION_MODE.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
Changes in v4:
- Fix order of mipi_dsi_compression_mode_ext() args (Marijn)
- Expanded kerneldoc coments for this function (Marijn)
- And added arguments validation (Marijn)
- In the panel driver send the COMPRESSION_MODE in LPM mode like it was
  done originally
- Expanded the .clock maths to show the reason behind the value (Marijn)
- Moved the mode out of the match data (Marijn)
- Link to v3: https://lore.kernel.org/r/20240402-lg-sw43408-panel-v3-0-144f17a11a56@linaro.org

Changes in v3:
- Fixed return type of MIPI DSC functions
- Replaced mipi_dsi_compression_mode_raw() with
  mipi_dsi_compression_mode_ext() (Marijn)
- Link to v2: https://lore.kernel.org/r/20240330-lg-sw43408-panel-v2-0-293a58717b38@linaro.org

Changes in v2:
- Removed formatting char from schema (Krzysztof)
- Moved additionalProperties after required (Krzysztof)
- Added example to the schema (Krzysztof)
- Removed obsolete comment in the commit message (Marijn)
- Moved DSC params to the panel struct (Marijn)
- Changed dsc_en to be an array (Marijn)
- Added comment regiarding slice_width and slice_count (Marijn)
- Link to v1: https://lore.kernel.org/r/20240330-lg-sw43408-panel-v1-0-f5580fc9f2da@linaro.org

---
Dmitry Baryshkov (2):
      drm/mipi-dsi: use correct return type for the DSC functions
      drm/mipi-dsi: add mipi_dsi_compression_mode_ext()

Sumit Semwal (2):
      dt-bindings: panel: Add LG SW43408 MIPI-DSI panel
      drm: panel: Add LG sw43408 panel driver

 .../bindings/display/panel/lg,sw43408.yaml         |  62 ++++
 MAINTAINERS                                        |   8 +
 drivers/gpu/drm/drm_mipi_dsi.c                     |  45 ++-
 drivers/gpu/drm/panel/Kconfig                      |  11 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-lg-sw43408.c           | 323 +++++++++++++++++++++
 include/drm/drm_mipi_dsi.h                         |  15 +-
 7 files changed, 453 insertions(+), 12 deletions(-)
---
base-commit: a6bd6c9333397f5a0e2667d4d82fef8c970108f2
change-id: 20240330-lg-sw43408-panel-b552f411c53e

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>