linux-stable.git/drivers/gpu/drm/panel, branch v6.6.2

drm/panel: Move AUX B116XW03 out of panel-edp back to panel-simple

2023-10-12T16:25:00+00:00

In commit 5f04e7ce392d ("drm/panel-edp: Split eDP panels out of
panel-simple") I moved a pile of panels out of panel-simple driver
into the newly created panel-edp driver. One of those panels, however,
shouldn't have been moved.

As is clear from commit e35e305eff0f ("drm/panel: simple: Add AUO
B116XW03 panel support"), AUX B116XW03 is an LVDS panel. It's used in
exynos5250-snow and exynos5420-peach-pit where it's clear that the
panel is hooked up with LVDS. Furthermore, searching for datasheets I
found one that makes it clear that this panel is LVDS.

As far as I can tell, I got confused because in commit 88d3457ceb82
("drm/panel: auo,b116xw03: fix flash backlight when power on") Jitao
Shi added "DRM_MODE_CONNECTOR_eDP". That seems wrong. Looking at the
downstream ChromeOS trees, it seems like some Mediatek boards are
using a panel that they call "auo,b116xw03" that's an eDP panel. The
best I can guess is that they actually have a different panel that has
similar timing. If so then the proper panel should be used or they
should switch to the generic "edp-panel" compatible.

When moving this back to panel-edp, I wasn't sure what to use for
.bus_flags and .bus_format and whether to add the extra "enable" delay
from commit 88d3457ceb82 ("drm/panel: auo,b116xw03: fix flash
backlight when power on"). I've added formats/flags/delays based on my
(inexpert) analysis of the datasheet. These are untested.

NOTE: if/when this is backported to stable, we might run into some
trouble. Specifically, before 474c162878ba ("arm64: dts: mt8183:
jacuzzi: Move panel under aux-bus") this panel was used by
"mt8183-kukui-jacuzzi", which assumed it was an eDP panel. I don't
know what to suggest for that other than someone making up a bogus
panel for jacuzzi that's just for the stable channel.

Fixes: 88d3457ceb82 ("drm/panel: auo,b116xw03: fix flash backlight when power on")
Fixes: 5f04e7ce392d ("drm/panel-edp: Split eDP panels out of panel-simple")
Tested-by: Anton Bambura
Acked-by: Hsin-Yi Wang
Signed-off-by: Douglas Anderson
Link: https://patchwork.freedesktop.org/patch/msgid/20230925150010.1.Iff672233861bcc4cf25a7ad0a81308adc3bda8a4@changeid

drm/panel: boe-tv101wum-nl6: Completely pull GPW to VGL before TP term

2023-10-10T08:38:17+00:00

The sta_himax83102 panel sometimes shows abnormally flickering
horizontal lines. The front gate output will precharge the X point of
the next pole circuit before TP(TouchPanel Enable) term starts, and wait
until the end of the TP term to resume the CLK. For this reason, the X
point must be maintained during the TP term. In abnormal case, we
measured a slight leakage at point X. This because during the TP term,
the GPW does not fully pull the VGL low, causing the TFT to not be
closed tightly.

To fix this, we completely pull GPW to VGL before entering the TP term.
This will ensure that the TFT is closed tightly and prevent the abnormal
display.

Fixes: 1bc2ef065f13 ("drm/panel: Support for Starry-himax83102-j02 TDDI MIPI-DSI panel")
Signed-off-by: Ruihai Zhou 
Reviewed-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20231007064949.22668-1-zhouruihai@huaqin.corp-partner.google.com
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20231007064949.22668-1-zhouruihai@huaqin.corp-partner.google.com

BackMerge tag 'v6.5-rc7' into drm-next

2023-08-23T21:26:06+00:00

Linux 6.5-rc7

This is needed for the CI stuff and the msm pull has fixes in it.

Signed-off-by: Dave Airlie

drm/panel: simple: Fix Innolux G156HCE-L01 LVDS clock

2023-08-16T16:51:51+00:00

This panel has been implemented in commit eae7488814b5 ("drm/panel-simple:
Add Innolux G156HCE-L01 panel entry") with a higher clock than the typical
one mentioned on the documentation to avoid flickering on the unit
tested. Testing on a different unit shows that the panel actually works
with the intended 70.93 MHz clock and even lower frequencies so the
flickering is likely caused either by a defective unit or by other
different components such as the bridge.

Fixes: eae7488814b5 ("drm/panel-simple: Add Innolux G156HCE-L01 panel entry")
Signed-off-by: Luca Ceresoli 
Tested-by: Marek Vasut  # MX8MM with LT9211
Reviewed-by: Marek Vasut 
[narmstrong: fixed commit id in commit msg]
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230814134024.397739-1-luca.ceresoli@bootlin.com

drm/panel: simple: Fix AUO G121EAN01 panel timings according to the docs

2023-08-14T12:50:47+00:00

Commit 03e909acd95a ("drm/panel: simple: Add support for AUO G121EAN01.4
panel") added support for this panel model, but the timings it implements
are very different from what the datasheet describes. I checked both the
G121EAN01.0 datasheet from [0] and the G121EAN01.4 one from [1] and they
all have the same timings: for example the LVDS clock typical value is 74.4
MHz, not 66.7 MHz as implemented.

Replace the timings with the ones from the documentation. These timings
have been tested and the clock frequencies verified with an oscilloscope to
ensure they are correct.

Also use struct display_timing instead of struct drm_display_mode in order
to also specify the minimum and maximum values.

[0] https://embedded.avnet.com/product/g121ean01-0/
[1] https://embedded.avnet.com/product/g121ean01-4/

Fixes: 03e909acd95a ("drm/panel: simple: Add support for AUO G121EAN01.4 panel")
Signed-off-by: Luca Ceresoli 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230804151239.835216-1-luca.ceresoli@bootlin.com

drm/panel: JDI LT070ME05000 simplify with dev_err_probe()

2023-08-14T12:48:49+00:00

Use the dev_err_probe() helper to simplify error handling during probe.
This also handle scenario, when EDEFER is returned and useless error is printed.

Fixes error:
panel-jdi-lt070me05000 4700000.dsi.0: cannot get enable-gpio -517

Signed-off-by: David Heidelberg 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230812185239.378582-1-david@ixit.cz

drm/panel: sitronix-st7789v: add jasonic jt240mhqs-hwt-ek-e3 support

2023-08-04T13:27:07+00:00

The Jasonic JT240MHQS-HWT-EK-E3 is a custom panel using the Sitronix
ST7789V controller. While the controller features a resolution of
320x240, only an area of 280x240 is visible by design.

Signed-off-by: Michael Riesch 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230718-feature-lcd-panel-v2-4-2485ca07b49d@wolfvision.net

drm/panel: sitronix-st7789v: add support for partial mode

2023-08-04T13:27:07+00:00

The ST7789V controller features support for the partial mode. Here,
the area to be displayed can be restricted in one direction (by default,
in vertical direction). This is useful for panels that are partially
occluded by design. Add support for the partial mode.

Signed-off-by: Michael Riesch 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230718-feature-lcd-panel-v2-3-2485ca07b49d@wolfvision.net

drm/panel: sitronix-st7789v: add panel orientation support

2023-08-04T11:56:11+00:00

Determine the orientation of the display based on the device tree and
propagate it.

Reviewed-by: Neil Armstrong 
Reviewed-by: Sebastian Reichel 
Signed-off-by: Michael Riesch 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230718-feature-st7789v-v3-2-157d68fb63e2@wolfvision.net

drm/panel: sitronix-st7789v: fix indentation in drm_panel_funcs

2023-08-04T11:56:11+00:00

Fix indentation of the callbacks in struct drm_panel_funcs.
No functional changes.

Reviewed-by: Sebastian Reichel 
Signed-off-by: Michael Riesch 
Signed-off-by: Neil Armstrong 
Link: https://patchwork.freedesktop.org/patch/msgid/20230718-feature-st7789v-v3-1-157d68fb63e2@wolfvision.net