linux-kernel - [PATCH v2 00/14] drm/msm/hdmi: rework and fix the HPD even generation

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Date: Wed, 22 May 2024 13:50:52 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 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
Subject: [PATCH v2 00/14] 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/

---
Dmitry Baryshkov (14):
      drm/msm/hdmi: move the alt_iface clock to the hpd list
      drm/msm/hdmi: simplify extp clock handling
      drm/msm/hdmi: switch to atomic_pre_enable/post_disable
      drm/msm/hdmi: set infoframes on all pre_enable calls
      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 one 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 |  80 +++++++++---------
 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, 157 insertions(+), 256 deletions(-)
---
base-commit: 8314289a8d50a4e05d8ece1ae0445a3b57bb4d3b
change-id: 20240522-fd-hdmi-hpd-e3868deb6ae0

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