linux.git/drivers/gpu/drm/panel/panel-simple.c, branch v5.4.63

drm: panel: simple: Fix bpc for LG LB070WV8 panel

2020-08-19T06:16:11+00:00

[ Upstream commit a6ae2fe5c9f9fd355a48fb7d21c863e5b20d6c9c ]

The LG LB070WV8 panel incorrectly reports a 16 bits per component value,
while the panel uses 8 bits per component. Fix it.

Fixes: dd0150026901 ("drm/panel: simple: Add support for LG LB070WV8 800x480 7" panel")
Signed-off-by: Laurent Pinchart 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20200711225317.28476-1-laurent.pinchart+renesas@ideasonboard.com
Signed-off-by: Sasha Levin

drm/panel: simple: Add Logic PD Type 28 display support

2020-02-24T07:36:33+00:00

[ Upstream commit 0d35408afbeb603bc9972ae91e4dd2638bcffe52 ]

Previously, there was an omap panel-dpi driver that would
read generic timings from the device tree and set the display
timing accordingly.  This driver was removed so the screen
no longer functions.  This patch modifies the panel-simple
file to setup the timings to the same values previously used.

Fixes: 8bf4b1621178 ("drm/omap: Remove panel-dpi driver")

Signed-off-by: Adam Ford 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20191016135147.7743-1-aford173@gmail.com
Signed-off-by: Sasha Levin

drm/panel: simple: Support TI nspire panels

2019-08-09T07:17:09+00:00

This adds support for the TI nspire panels to the simple panel
roster. This code is based on arch/arm/mach-nspire/clcd.c.
This includes likely the first grayscale panel supported.

These panels will be used with the PL11x DRM driver.

Cc: Daniel Tang 
Cc: Fabian Vogt 
Tested-by: Fabian Vogt 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Linus Walleij 
Link: https://patchwork.freedesktop.org/patch/msgid/20190805085847.25554-4-linus.walleij@linaro.org

drm/panel: simple: Add support for Sharp LD-D5116Z01B panel

2019-07-26T12:16:48+00:00

The Sharp LD-D5116Z01B is a 12.3" eDP panel with a 1920X1280 resolution.

Signed-off-by: Jeffrey Hugo 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20190708165811.46370-1-jeffrey.l.hugo@gmail.com

drm/panel: simple: document panel_desc; rename a few functions

2019-07-17T17:27:33+00:00

This attempts to address outstanding review feedback from
commit b8a2948fa2b3 ("drm/panel: simple: Add ability to override typical timing")

Specifically:

* It was requested that I document (in the structure definition) that
  the device tree override had no effect if 'struct drm_display_mode'
  was used in the panel description.  I have provided full Doxygen
  comments for 'struct panel_desc' to accomplish that.
* panel_simple_get_fixed_modes() was thought to be a confusing name,
  so it has been renamed to panel_simple_get_display_modes().
* panel_simple_parse_override_mode() was thought to be better named as
  panel_simple_parse_panel_timing_node().

Suggested-by: Sam Ravnborg 
Signed-off-by: Douglas Anderson 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20190712163333.231884-1-dianders@chromium.org

drm/panel: simple: fix AUO g185han01 horizontal blanking

2019-07-12T16:13:26+00:00

The horizontal blanking periods are too short, as the values are
specified for a single LVDS channel. Since this panel is dual LVDS
they need to be doubled. With this change the panel reaches its
nominal vrefresh rate of 60Fps, instead of the 64Fps with the
current wrong blanking.

Philipp Zabel added:
The datasheet specifies 960 active clocks + 40/128/160 clocks blanking
on each of the two LVDS channels (min/typical/max), so doubled this is
now correct.

Signed-off-by: Lucas Stach 
Reviewed-by: Philipp Zabel 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/1562764060.23869.12.camel@pengutronix.de

drm/panel: simple: Use display_timing for AUO b101ean01

2019-07-12T05:55:47+00:00

Convert the AUO b101ean01 from using a fixed mode to specifying a
display timing with min/typ/max values.

The AUO b101ean01's datasheet says:
* Vertical blanking min is 12
* Horizontal blanking min is 60
* Pixel clock is between 65.3 MHz and 75 MHz

The goal here is to be able to specify the proper timing in device
tree to use on rk3288-veyron-minnie to match what the downstream
kernel is using so that it can used the fixed PLL.

Changes in v4:
 - display_timing for AUO b101ean01 new for v4.
Changes in v6:
 - Rebased to drm-misc next
 - Added tags

Signed-off-by: Douglas Anderson 
Acked-by: Thierry Reding 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20190711203455.125667-4-dianders@chromium.org

drm/panel: simple: Use display_timing for Innolux n116bge

2019-07-12T05:55:47+00:00

Convert the Innolux n116bge from using a fixed mode to specifying a
display timing with min/typ/max values.

Note that the n116bge's datasheet doesn't fit too well into DRM's way
of specifying things. Specifically the panel's datasheet just
specifies the vertical blanking period and horizontal blanking period
and doesn't break things out. For now we'll leave everything as a
fixed value but just allow adjusting the pixel clock. I've added a
comment on what the datasheet claims so someone could later expand
things to fit their needs if they wanted to test other blanking
periods.

The goal here is to be able to specify the panel timings in the device
tree for several rk3288 Chromebooks (like rk3288-veryon-jerry). These
Chromebooks have all been running in the downstream kernel with the
standard porches and sync lengths but just with a slightly slower
pixel clock because the 76.42 MHz clock is not achievable from the
fixed PLL that was available. These Chromebooks only achieve a
refresh rate of ~58 Hz. While it's probable that we could adjust the
timings to achieve 60 Hz it's probably wisest to match what's been
running on these devices all these years.

I'll note that though the upstream kernel has always tried to achieve
76.42 MHz, it has actually been running at 74.25 MHz also since the
video processor is parented off the same fixed PLL.

Changes in v4:
- display_timing for Innolux n116bge new for v4.
Changes in v5:
- Added Heiko's Tested-by
Changes in v6:
- Rebased to drm-misc next
- Added tags

Signed-off-by: Douglas Anderson
Tested-by: Heiko Stuebner
Acked-by: Thierry Reding
Signed-off-by: Sam Ravnborg
Link: https://patchwork.freedesktop.org/patch/msgid/20190711203455.125667-3-dianders@chromium.org

drm/panel: simple: Add ability to override typical timing

2019-07-12T05:55:46+00:00

This patch adds the ability to override the typical display timing for a
given panel. This is useful for devices which have timing constraints
that do not apply across the entire display driver (eg: to avoid
crosstalk between panel and digitizer on certain laptops). The rules are
as follows:

- panel must not specify fixed mode (since the override mode will
  either be the same as the fixed mode, or we'll be unable to
  check the bounds of the overried)
- panel must specify at least one display_timing range which will be
  used to ensure the override mode fits within its bounds

Changes in v2:
 - Parse the full display-timings node (using the native-mode) (Rob)
Changes in v3:
 - No longer parse display-timings subnode, use panel-timing (Rob)
Changes in v4:
 - Don't add mode from timing if override was specified (Thierry)
 - Add warning if timing and fixed mode was specified (Thierry)
 - Don't add fixed mode if timing was specified (Thierry)
 - Refactor/rename a bit to avoid extra indentation from "if" tests
 - i should be unsigned (Thierry)
 - Add annoying WARN_ONs for some cases (Thierry)
 - Simplify 'No display_timing found' handling (Thierry)
 - Rename to panel_simple_parse_override_mode() (Thierry)
Changes in v5:
 - Added Heiko's Tested-by
Changes in v6:
 - Rebased to drm-misc next
 - Added tags

Cc: Doug Anderson 
Cc: Eric Anholt 
Cc: Heiko Stuebner 
Cc: Jeffy Chen 
Cc: Rob Herring 
Cc: Stéphane Marchesin 
Cc: Thierry Reding 
Cc: devicetree@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Sean Paul 
Tested-by: Enric Balletbo i Serra 
Signed-off-by: Douglas Anderson 
Tested-by: Heiko Stuebner 
Reviewed-by: Boris Brezillon 
Acked-by: Thierry Reding 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20190711203455.125667-2-dianders@chromium.org

drm/panel: simple: Add Sharp LS020B1DD01D panel support

2019-06-26T11:38:16+00:00

The Sharp LS020B1DD01D is a simple 2.0" 240x160 16-bit TFT panel.

Signed-off-by: Paul Cercueil 
Tested-by: Artur Rojek 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20190603153120.23947-3-paul@crapouillou.net