linux-kernel - [PATCH v2 0/6] drm/panel: atna33xc20: Fix the Samsung ATNA33XC20 panel

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Date:   Fri, 30 Jul 2021 08:45:59 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     dri-devel@...ts.freedesktop.org
Cc:     devicetree@...r.kernel.org, steev@...i.org, robert.foss@...aro.org,
        Laurent.pinchart@...asonboard.com, bjorn.andersson@...aro.org,
        daniel@...ll.ch, airlied@...ux.ie, jernej.skrabec@...il.com,
        maarten.lankhorst@...ux.intel.com, rodrigo.vivi@...el.com,
        sam@...nborg.org, jonas@...boo.se, mripard@...nel.org,
        thierry.reding@...il.com, lyude@...hat.com,
        linus.walleij@...aro.org, rajeevny@...eaurora.org,
        linux-arm-msm@...r.kernel.org, a.hajda@...sung.com,
        tzimmermann@...e.de, narmstrong@...libre.com,
        Douglas Anderson <dianders@...omium.org>,
        Sandeep Panda <spanda@...eaurora.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/6] drm/panel: atna33xc20: Fix the Samsung ATNA33XC20 panel

The overall goal of this series is to make the Samsung ATNA33XC20
panel work more properly. As part of this, we have:
* A bugfix for the recently abstracted DP AUX backlight code.
* A bugfix for the sequencing of the ti-sn65dsi86 bridge driver.
* Removal of the panel from panel-simple and moving it to its own
  driver.

If the bugfixes look good but the rest of the series needs work then
those could land early on their own. There's no real compile time
dependency on the bugfixes, things are just glitchier without them.

NOTE: this series will (slightly) conflict with my other recent series
making eDP panels probable [1]. I'll re-post that one atop this
one. It should be noted that the fact that the Samsung ATNA33XC20
needs its own panel driver means that it _can't_ handled as a probed
driver. I think this is fine, at least for now. I don't think it would
be easy to make a unified design with this panel and other panels
given that it's an AMOLED panel and has a whole bunch of different
components on board.

As discussed in IRC, the only difference in v2 is the addition of a
"Fixes" tag to patch #3 and the collection of Reviews/Acks from Sean
and Robert.

If people feel that this is ready to land today then I can help land
it (please let me know). Otherwise I'm happy for someone else to
actually do the commit next week (I'm on vacation) or I can take it
when I get back.

[1] https://lore.kernel.org/r/20210723002146.1962910-1-dianders@chromium.org/

Changes in v2:
- Added Fixes tag as requested by Sam.

Douglas Anderson (6):
  drm/dp: Don't zero PWMGEN_BIT_COUNT when driver_pwm_freq_hz not
    specified
  drm/bridge: ti-sn65dsi86: Fix power off sequence
  drm/bridge: ti-sn65dsi86: Add some 100 us delays
  Revert "drm/panel-simple: Add Samsung ATNA33XC20"
  Revert "drm/panel-simple: Support for delays between GPIO & regulator"
  drm/panel: atna33xc20: Introduce the Samsung ATNA33XC20 panel

 drivers/gpu/drm/bridge/ti-sn65dsi86.c         |  17 +-
 drivers/gpu/drm/drm_dp_helper.c               |  10 +-
 drivers/gpu/drm/panel/Kconfig                 |  12 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-samsung-atna33xc20.c  | 366 ++++++++++++++++++
 drivers/gpu/drm/panel/panel-simple.c          |  61 ---
 6 files changed, 398 insertions(+), 69 deletions(-)
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-atna33xc20.c

-- 
2.32.0.554.ge1b32706d8-goog