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[00/15] drm/msm/hdmi: rework and fix the HPD even generation

Message ID 20230630205523.76823-1-dmitry.baryshkov@linaro.org
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Series drm/msm/hdmi: rework and fix the HPD even generation | expand

Message

Dmitry Baryshkov June 30, 2023, 8:55 p.m. UTC 
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. On APQ8064 in some
rare cases I get the backtrace logged at [2]. It is unclear if it is a
result of this series or not. I'll investigate it further later on.

[1] https://lore.kernel.org/linux-arm-msm/20171027105732.19235-2-architt@codeaurora.org/
[2] https://gitlab.freedesktop.org/drm/msm/-/issues/27

Dmitry Baryshkov (15):
  drm/msm/hdmi: move the alt_iface clock to the hpd list
  drm/msm/hdmi: simplify extp clock handling
  drm/msm/hdmi: correct indentation of HDMI bridge functions
  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        | 142 ++++++++++++-------------
 drivers/gpu/drm/msm/hdmi/hdmi.h        |  26 ++---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c |  91 ++++++++--------
 drivers/gpu/drm/msm/hdmi/hdmi_hpd.c    | 141 +++++-------------------
 drivers/gpu/drm/msm/hdmi/hdmi_i2c.c    |  14 ++-
 drivers/gpu/drm/msm/hdmi/hdmi_phy.c    |   6 +-
 6 files changed, 160 insertions(+), 260 deletions(-)