Hello!
This series adds support for display panel's DT rotation property. It's a continuation of the work that was initially started by Derek Basehore for the panel driver that is used by some Mediatek device [1]. I picked up the Derek's patches and added my t-b and r-b tags to them, I also added rotation support to the panel-lvds and panel-simple drivers.
We need the rotation support for the Nexus 7 tablet device which is pending to become supported by upstream kernel, the device has display panel mounted upside-down and it uses panel-lvds [2].
[1] https://lkml.org/lkml/2020/3/5/1119 [2] https://patchwork.ozlabs.org/project/linux-tegra/patch/20200607154327.18589-...
Changelog:
v11: - This series is factored out from this patchset [3] because these patches do not have hard dependency on the Tegra DRM patches and it should be nicer to review and apply the properly grouped patches.
- Initially [3] only touched the panel-lvds driver and Emil Velikov suggested that it will be better to support more panels in the review comments to [3]. So I included the Derek's patch for the BOE panel and added rotation support to the panel-simple driver. I tested that panel-lvds and panel-simple work properly with the rotated panel using the Opentegra Xorg driver [4] and Wayland Weston [5].
- The panel-lvds driver now prints a error message if rotation property fails to be parsed.
[3] https://lore.kernel.org/lkml/20200614200121.14147-1-digetx@gmail.com/ [4] https://github.com/grate-driver/xf86-video-opentegra/commit/28eb20a3959bbe5b... [5] https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/315
Derek Basehore (2): drm/panel: Add helper for reading DT rotation drm/panel: Read panel orientation for BOE TV101WUM-NL6
Dmitry Osipenko (2): drm/panel: lvds: Read panel orientation drm/panel-simple: Read panel orientation
drivers/gpu/drm/drm_panel.c | 43 +++++++++++++++++++ .../gpu/drm/panel/panel-boe-tv101wum-nl6.c | 6 +++ drivers/gpu/drm/panel/panel-lvds.c | 10 +++++ drivers/gpu/drm/panel/panel-simple.c | 11 +++++ include/drm/drm_panel.h | 9 ++++ 5 files changed, 79 insertions(+)