linux.git/drivers/gpu/drm/bridge/Kconfig, branch v5.16

drm/bridge: ti-sn65dsi86: Add support for the DP AUX bus

2021-06-11T19:31:38+00:00

We want to provide our panel with access to the DP AUX channel. The
way to do this is to let our panel be a child of ours using the fancy
new DP AUX bus support.

Signed-off-by: Douglas Anderson 
Acked-by: Linus Walleij 
Reviewed-by: Lyude Paul 
Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.8.Ib5fe0638da85800141ce141bb8e441c5f25438d4@changeid

drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver

2021-06-08T09:42:25+00:00

Add driver for TI SN65DSI83 Single-link DSI to Single-link LVDS bridge
and TI SN65DSI84 Single-link DSI to Dual-link or 2x Single-link LVDS
bridge. TI SN65DSI85 is unsupported due to lack of hardware to test on,
but easy to add.

The driver operates the chip via I2C bus. Currently the LVDS clock are
always derived from DSI clock lane, which is the usual mode of operation.
Support for clock from external oscillator is not implemented, but it is
easy to add if ever needed. Only RGB888 pixel format is implemented, the
LVDS666 is not supported, but could be added if needed.

Reviewed-by: Linus Walleij 
Reviewed-by: Frieder Schrempf 
Tested-by: Frieder Schrempf 
Tested-by: Adam Ford 
Signed-off-by: Marek Vasut 
Cc: Douglas Anderson 
Cc: Jagan Teki 
Cc: Laurent Pinchart 
Cc: Linus Walleij 
Cc: Loic Poulain 
Cc: Philippe Schenker 
Cc: Sam Ravnborg 
Cc: Stephen Boyd 
Cc: Valentin Raevsky 
To: dri-devel@lists.freedesktop.org
Signed-off-by: Robert Foss 
Link: https://patchwork.freedesktop.org/patch/msgid/20210607174258.16300-2-marex@denx.de

drm/bridge: DRM_CROS_EC_ANX7688 should depend on I2C_CROS_EC_TUNNEL

2021-05-27T12:09:27+00:00

The ChromeOS EC ANX7688 bridge is connected to a ChromeOS Embedded
Controller, and is accessed using I2C tunneling through the Embedded
Controller.  Hence add a dependency on I2C_CROS_EC_TUNNEL, to prevent
asking the user about this driver when configuring a kernel without
support for the ChromeOS EC tunnel I2C bus.

Fixes: 44602b10d7f2a5f7 ("drm/bridge: Add ChromeOS EC ANX7688 bridge driver support")
Signed-off-by: Geert Uytterhoeven 
Reviewed-by: Enric Balletbo i Serra 
Signed-off-by: Robert Foss 
Link: https://patchwork.freedesktop.org/patch/msgid/d107d1840b83607baee8571cc5d88973fc32b519.1622015323.git.geert+renesas@glider.be

drm/bridge: Add ChromeOS EC ANX7688 bridge driver support

2021-05-18T14:41:01+00:00

This driver adds support for the ChromeOS EC ANX7688 HDMI to DP converter

For our use case, the only reason the Linux kernel driver is necessary is
to reject resolutions that require more bandwidth than what is available
on the DP side. DP bandwidth and lane count are reported by the bridge via
2 registers and, as far as we know, only chips that have a firmware
version greater than 0.85 support these two registers.

Signed-off-by: Nicolas Boichat 
Signed-off-by: Hsin-Yi Wang 
[The driver is OF only so should depends on CONFIG_OF]
Reported-by: kbuild test robot 
Signed-off-by: Enric Balletbo i Serra 
[convert to i2c driver, rename to cros_ec_anx7688, add err checks]
Signed-off-by: Dafna Hirschfeld 
Reviewed-by: Laurent Pinchart 
Signed-off-by: Robert Foss 
Link: https://patchwork.freedesktop.org/patch/msgid/20210518141927.24795-3-dafna.hirschfeld@collabora.com

drm/bridge: fix LONTIUM_LT8912B dependencies

2021-05-05T14:28:51+00:00

LONTIUM_LT8912B uses "drm_display_mode_to_videomode" from
DRM framework that needs VIDEOMODE_HELPERS to be enabled.

Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Reported-by: Michal Suchánek 
Signed-off-by: Adrien Grassein 
Reviewed-by: Robert Foss 
Signed-off-by: Robert Foss 
Link: https://patchwork.freedesktop.org/patch/msgid/20210504220207.4004511-1-adrien.grassein@gmail.com

drm/bridge: ti-sn65dsi86: Break GPIO and MIPI-to-eDP bridge into sub-drivers

2021-05-03T20:21:08+00:00

Let's use the newly minted aux bus to break up the driver into sub
drivers. We're not doing a full breakup here: all the code is still in
the same file and remains largely untouched. The big goal here of
using sub-drivers is to allow part of our code to finish probing even
if some other code needs to defer. This can solve some chicken-and-egg
problems. Specifically:
- In commit 48834e6084f1 ("drm/panel-simple: Support hpd-gpios for
  delaying prepare()") we had to add a bit of a hack to simpel-panel
  to support HPD showing up late. We can get rid of that hack now
  since the GPIO part of our driver can finish probing early.
- We have a desire to expose our DDC bus to simple-panel (and perhaps
  to a backlight driver?). That will end up with the same
  chicken-and-egg problem. A future patch to move this to a sub-driver
  will fix it.
- If/when we support the PWM functionality present in the bridge chip
  for a backlight we'll end up with another chicken-and-egg
  problem. If we allow the PWM to be a sub-driver too then it solves
  this problem.

Signed-off-by: Douglas Anderson 
Acked-by: Linus Walleij 
Link: https://patchwork.freedesktop.org/patch/msgid/20210423095743.v5.9.I3e68fa38c4ccbdbdf145cad2b01e83a1e5eac302@changeid

Merge drm/drm-next into drm-misc-next

2021-04-26T12:03:09+00:00

Christian needs some patches from drm/next

Signed-off-by: Maxime Ripard

Merge tag 'drm-misc-next-fixes-2021-04-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2021-04-23T03:53:07+00:00

A few fixes for the next merge window, with some build fixes for anx7625
and lt8912b bridges, incorrect error handling for lt8912b and TTM, and
one fix for TTM page limit accounting.

Signed-off-by: Dave Airlie 

From: Maxime Ripard 
Link: https://patchwork.freedesktop.org/patch/msgid/20210422163329.dvbuwre3akwdmzjt@gilmour

drm: bridge: add it66121 driver

2021-04-21T11:51:29+00:00

This commit is a simple driver for bridge HMDI it66121.
The input format is RBG and there is no color conversion.
Audio, HDCP and CEC are not supported yet.

Signed-off-by: Phong LE 
Signed-off-by: Neil Armstrong 
Reviewed-by: Robert Foss 
Link: https://patchwork.freedesktop.org/patch/msgid/20210419071223.2673533-3-narmstrong@baylibre.com

drm/bridge/sii8620: fix dependency on extcon

2021-04-19T18:04:30+00:00

The DRM_SIL_SII8620 kconfig has a weak `imply` dependency
on EXTCON, which causes issues when sii8620 is built
as a builtin and EXTCON is built as a module.

The symptoms are 'undefined reference' errors caused
by the symbols in EXTCON not being available
to the sii8620 driver.

Fixes: 688838442147 ("drm/bridge/sii8620: use micro-USB cable detection logic to detect MHL")
Reported-by: kernel test robot 
Signed-off-by: Robert Foss 
Reviewed-by: Randy Dunlap 
Link: https://patchwork.freedesktop.org/patch/msgid/20210419090124.153560-1-robert.foss@linaro.org