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[v3,0/7] drm/msm/mdp4: rework LVDS/LCDC panel support

Message ID 20250227-fd-mdp4-lvds-v3-0-c983788987ae@linaro.org (mailing list archive)
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Series drm/msm/mdp4: rework LVDS/LCDC panel support | expand

Message

Dmitry Baryshkov Feb. 27, 2025, 2:25 a.m. UTC 
The LCDC controller uses pixel clock provided by the multimedia clock
controller (mmcc) instead of using LVDS PHY clock directly. Link LVDS
clocks properly, taking MMCC into account.

MDP4 uses custom code to handle LVDS panel. It predates handling
EPROBE_DEFER, it tries to work when the panel device is not available,
etc. Switch MDP4 LCDC code to use drm_panel_bridge/drm_bridge_connector
to follow contemporary DRM practices.

---
Changes in v3:
- Fixed commit message to explain that DT name is used in addition to
  the global system table lookup (Konrad).
- Link to v2: https://lore.kernel.org/r/20250220-fd-mdp4-lvds-v2-0-15afe5578a31@linaro.org

Changes in v2:
- Rebase on top of msm-next.
- Upgrade LVDS clock code to use clock providers and parent_data
- Use LVDS clock from the MMCC instead of using LVDS PHY directly
- Link to v1: https://lore.kernel.org/r/20220616090321.433249-1-dmitry.baryshkov@linaro.org

---
Dmitry Baryshkov (7):
      dt-bindings: display: msm: mdp4: add LCDC clock and PLL source
      drm/msm/mdp4: drop mpd4_lvds_pll_init stub
      drm/msm/mdp4: register the LVDS PLL as a clock provider
      drm/msm/mdp4: use parent_data for LVDS PLL
      drm/msm/mdp4: move move_valid callback to lcdc_encoder
      drm/msm/mdp4: switch LVDS to use drm_bridge/_connector
      arm: dts: qcom: apq8064: link LVDS clocks

 .../devicetree/bindings/display/msm/mdp4.yaml      |   9 +-
 arch/arm/boot/dts/qcom/qcom-apq8064.dtsi           |  16 ++-
 drivers/gpu/drm/msm/Makefile                       |   1 -
 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c           |  34 ++++--
 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.h           |  16 +--
 drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c  |  55 +++++-----
 .../gpu/drm/msm/disp/mdp4/mdp4_lvds_connector.c    | 121 ---------------------
 drivers/gpu/drm/msm/disp/mdp4/mdp4_lvds_pll.c      |  28 ++---
 8 files changed, 86 insertions(+), 194 deletions(-)
---
base-commit: 66054467b223f366fc463bb69aa7dcd050986e62
change-id: 20240317-fd-mdp4-lvds-e317f86fd99c

Best regards,