linux-kernel - [PATCH v3 00/13] drm/msm/hdmi: rework and fix the HPD even generation

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Date: Sun, 23 Jun 2024 01:02:13 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: 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>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH v3 00/13] drm/msm/hdmi: rework and fix the HPD even
 generation

The MSM HDMI driver is plagued with the long-standing bug. If HDMI cable
is disconnected, in most of the cases cable reconnection will not be
detected properly. We have been carrying the patch from [1] in our
integration tree for ages. The time has come to fix the long-standing
bug and implement proper HPD handling.

This series was tested on msm8996 and apq8064 boards. Previously HPD
handling sometimes could trigger in the CRTC event handling, however I
can no longer reproduce it now.

[1] https://lore.kernel.org/linux-arm-msm/20171027105732.19235-2-architt@codeaurora.org/

---
Changes in v3:
- Rebase on top of linux-next
- Dropped the patches that were replaced by the HDMI Connector
  framework
- Picked up the mode_set -> atomic_pre_enable patch
- Link to v2: https://lore.kernel.org/r/20240522-fd-hdmi-hpd-v2-0-c30bdb7c5c7e@linaro.org

---
Dmitry Baryshkov (13):
      drm/msm/hdmi: program HDMI timings during atomic_pre_enable
      drm/msm/hdmi: move the alt_iface clock to the hpd list
      drm/msm/hdmi: simplify extp clock handling
      drm/msm/hdmi: drop clock frequency assignment
      drm/msm/hdmi: switch to clk_bulk API
      drm/msm/hdmi: switch to pm_runtime_resume_and_get()
      drm/msm/hdmi: add runtime PM calls to DDC transfer function
      drm/msm/hdmi: implement proper runtime PM handling
      drm/msm/hdmi: rename hpd_clks to pwr_clks
      drm/msm/hdmi: expand the HDMI_CFG macro
      drm/msm/hdmi: drop hpd-gpios support
      drm/msm/hdmi: ensure that HDMI is up if HPD is requested
      drm/msm/hdmi: wire in hpd_enable/hpd_disable bridge ops

 drivers/gpu/drm/msm/hdmi/hdmi.c        | 145 ++++++++++++++++-----------------
 drivers/gpu/drm/msm/hdmi/hdmi.h        |  26 ++----
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c |  73 ++++++++---------
 drivers/gpu/drm/msm/hdmi/hdmi_hpd.c    | 142 ++++++--------------------------
 drivers/gpu/drm/msm/hdmi/hdmi_i2c.c    |  14 +++-
 drivers/gpu/drm/msm/hdmi/hdmi_phy.c    |   6 +-
 6 files changed, 150 insertions(+), 256 deletions(-)
---
base-commit: d6beed9e425d272d4a332e6ee684ac457f91b570
change-id: 20240522-fd-hdmi-hpd-e3868deb6ae0

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