Unpreparing and re-preparing a panel can be a really heavy
operation. Panels datasheets often specify something on the order of
500ms as the delay you should insert after turning off the panel
before turning it on again. In addition, turning on a panel can have
delays on the order of 100ms - 200ms before the panel will assert HPD
(AKA "panel ready"). The above means that we should avoid turning a
panel off if we're going to turn it on again shortly.

The above becomes a problem when we want to read the EDID of a
panel. The way that ordering works is that userspace wants to read the
EDID of the panel _before_ fully enabling it so that it can set the
initial mode correctly. However, we can't read the EDID until we power
it up. This leads to code that does this dance (like
ps8640_bridge_get_edid()):

1. When userspace requests EDID / the panel modes (through an ioctl),
   we power on the panel just enough to read the EDID and then power
   it off.
2. Userspace then turns the panel on.

There's likely not much time between step #1 and #2 and so we want to
avoid powering the panel off and on again between those two steps.

Let's use Runtime PM to help us. We'll move the existing prepare() and
unprepare() to be runtime resume() and runtime suspend(). Now when we
want to prepare() or unprepare() we just increment or decrement the
refcount. We'll default to a 1 second autosuspend delay which seems
sane given the typical delays we see for panels.

A few notes:
- It seems the existing unprepare() and prepare() are defined to be
  no-ops if called extra times. We'll preserve that behavior but may
  try to remove it in a future patch.
- This is a slight change in the ABI of simple panel. If something was
  absolutely relying on the unprepare() to happen instantly that
  simply won't be the case anymore. I'm not aware of anyone relying on
  that behavior, but if there is someone then we'll need to figure out
  how to enable (or disable) this new delayed behavior selectively.
- In order for this to work we now have a hard dependency on
  "PM". From memory this is a legit thing to assume these days and we
  don't have to find some fallback to keep working if someone wants to
  build their system without "PM".

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210416153909.v4.7.I9e8bd33b49c496745bfac58ea9ab418bd3b6f5ce@changeid

The panel driver is no longer using any OMAP specific APIs, so
let's move it into the generic panel directory.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-40-tomi.valkeinen@ti.com

This add support for the Khadas TS050 1080x1920 5" LCD DSI panel designed to work
with the Khadas Edge-V, Captain, VIM3 and VIM3L Single Board Computers.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

The init values was taken from the vendor source tree, comments were added to the
know values but most of the init table is undocumented.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
[narmstrong: call drm_panel_remove if mipi_dsi_attach fails]
Link: https://patchwork.freedesktop.org/patch/msgid/20201204081949.38418-3-narmstrong@baylibre.com

Add support for the ShenZhen Asia Better Technology Ltd. Y030XX067A 3.0"
320x480 IPS panel.

This panel can be found in the YLM RG-280M, RG-300 and RG-99 handheld
gaming consoles. While being 320x480, it is actually a horizontal 4:3
panel with non-square pixels.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Christophe Branchereau <cbranchereau@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201101093150.8071-5-paul@crapouillou.net

The OnePlus 6/T devices use different panels however they are
functionally identical with the only differences being the resolution.
The panels also don't seem to be used by any other devices, just combine
them into one driver.

The panels are: samsung,sofef00
and             samsung,s6e3fc2x01

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
[fixed checkpatch warnings]
Link: https://patchwork.freedesktop.org/patch/msgid/20201112161920.2671430-2-caleb@connolly.tech

This adds support for the TDO TL070WSH30 TFT-LCD panel module.
The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200915121912.4347-5-narmstrong@baylibre.com

Novatek NT36672a is a generic DSI IC that drives command and video mode
panels. Add the driver for it.

Right now adding support for some Poco F1 phones that have an LCD panel
from Tianma connected with this IC, with a resolution of 1080x2246 that
operates in DSI video mode.

During testing, Benni Steini <bennisteinir@gmail.com> helped us fix
the reset sequence timing (from 10ms to 20ms), to get the bootanimation
to work on Android.

With current AOSP, we need to increase it to 200ms - this seems to be a
safe high value to avoid a white screen occasionally.

Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Benni Steini <bennisteinir@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200902064407.30712-3-sumit.semwal@linaro.org

This makes it possible to use the s6e63m0 panel with a
DSI host, such as in the Samsung GT-I8190 (Golden) mobile
phone.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200809215104.1830206-3-linus.walleij@linaro.org

This panel can be accessed using both SPI and DSI.

To make it possible to probe and use the device also from
a DSI bus, first break out the SPI support to its own file.

Since all the panel driver does is write DCS commands to
the panel, we pass a DCS write function to probe()
from each subdriver.

We make the Kconfig entry for SPI mode default so all
current users will continue to work.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/384873/

The panel uses a Focaltech FT8006p, the touch part is handled by the
already existing edt-ft5x06.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/118c6e03dd0ff6e86e495579102cbf7d0cfca6f4.1597652012.git.agx@sigxcpu.org

This rename is done so that the driver matches the name of the
display controller and in preparation for adding support for more
panels to the driver.

This is just a basic file rename, with no code changes.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701162928.1638874-5-megous@megous.com

This adds support for TMP5P5 NT35596 1080x1920 video
mode panel that can be found on some Asus Zenfone 2
Laser (Z00T) devices.

This panel seems to only be found in this device
and we have no straightforward way of actually
getting the correct model number, as no schematics
are released publicly.

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
[fixed checkpatch warnings]
Link: https://patchwork.freedesktop.org/patch/msgid/20200506210957.344590-2-konradybcio@gmail.com

Add support for Visionox rm69299 panel.

Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
[fix checkpatch warnings, added sentinel ]
Link: https://patchwork.freedesktop.org/patch/msgid/20200421045508.21137-2-harigovi@codeaurora.org

The LTK050H3146W is 5.0" 720x1280 DSI display. There are two variants
with essentially the same name, LTK050H3146W and LTK050H3146W-A2.

They differ in their init sequence and mode details.

changes in v2:
- add display variants
changes in v3:
- fixed indentation and artifacts found by Sam

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200408085317.2624599-2-heiko@sntech.de

Panel driver for the KD35T133 display from Elida, used for example
in the rk3326-based Odroid Go Advance handheld.

changes in v3:
- add missing return value assignment (Francesco)
- re-sort header includes (Sam)
changes in v2:
- rename dsi_generic_write_seq macro to dsi_dcs_write_seq to honor
  the underlying mipi_dsi_dcs_write (Robin)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200229151506.750242-3-heiko@sntech.de

This adds a driver for panels based on the Novatek NT35510
display driver IC, such as the Hydis HVA40WV1 panel found
in the Samsung GT-S7710.

The NT35510 can be used with both internal and external
backlight (such as GPIO backlight) so we support both:
if no external backlight is found, we register a subdriver
for the internal backlight.

Cc: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200223121841.26836-3-linus.walleij@linaro.org

Add driver for Samsung AMS452EF01 AMOLED panel, which makes
use of their S6E88A0 controller.

Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
[fixed checkpatch warnings, added changelog]
Link: https://patchwork.freedesktop.org/patch/msgid/20200130203555.316-2-michael.srba@seznam.cz

Feixin K101 IM2BA02 is a 800x1280 4-lane MIPI-DSI LCD panel.

Add a panel driver for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200116033636.512461-4-icenowy@aosc.io

Auo,kd101n80-45na's connector is same as boe,tv101wum-nl6.
The most codes can be reuse.
So auo,kd101n80-45na and boe,tv101wum-nl6 use one driver file.
Add the different parts in driver data.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200116021511.22675-4-jitao.shi@mediatek.com

Add driver for BOE tv101wum-nl6 panel is a 10.1" 1200x1920 panel.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200116021511.22675-3-jitao.shi@mediatek.com

The Sony ACX424AKP is a command/videomode DSI panel for
mobile devices. It is used on the ST-Ericsson HREF520
reference design. We support video mode by default, but
it is possible to switch the panel into command mode
by using the bool property "dsi-command-mode".

Cc: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200109072815.334867-1-linus.walleij@linaro.org

The LTK500HD1829 is 5.5" DSI display.

v5:
  - Fix some trivial checkpatch warnings while applying (sam)

changes in v4:
- drop error message if backlight not found, no other panel
  does that and if needed it should live in drm_panel_of_backlight
changes in v3:
- drop one more overlooked panel->drm access

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112641.30647-3-heiko@sntech.de

Base on the somewhat similar Rocktech driver but adapted for
panel-specific init of the XPP055C272.

changes in v5:
- drop error message when backlight not found, no other panel
  does that and if needed it should live in drm_panel_of_backlight
changes in v4:
  none
changes in v3:
- remove wrong negative sync flags from display-mode to fix a display
  artifact of the output getting move a tiny bit to the right
changes in v2:
- move to drm-panel-internal backlight handling (Sam)
- adapt to changes that happened to drm_panel structs+functions (Sam)
- sort includes (Sam)
- drop unnecessary DRV_NAME constant (Sam)
- do mipi_dsi_dcs_exit_sleep_mode and mipi_dsi_dcs_set_display_on
  in panel prepare (not init_sequence) to keep symmetric (Sam)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112907.30758-3-heiko@sntech.de

Support Boe Himax8279d 8.0" 1200x1920 TFT LCD panel, it is a MIPI DSI
panel.

V11:
- Use the backlight support in drm_panel to simplify the driver (Sam)

V10:
- Adjust init code, make the format more concise (Emil)

V9:
- kill off default_off_cmds (Emil)
- use mipi_dsi_dcs_set_display_{on,off} in their enable/disable
    callbacks. (Emil)
- Adjusting the delay function (Emil)

V8:
- modify PARENTHESIS_ALIGNMENT format (Sam)
- use gpios are required API replace optional gpio API (Emil)

V7:
- Modify communication address

V6:
- Add the information of the reviewer
- Remove unnecessary delays, The udelay_range code gracefully returns
    without hitting the scheduler on a delay of 0. (Derek)
- Merge the same data structures, like display_mode and off_cmds (Derek)
- Optimize the processing of results returned by
    devm_gpiod_get_optional (Derek)

V5:
- Add the information of the reviewer (Sam)
- Delete unnecessary header files #include <linux/fb.h> (Sam)
- The config DRM_PANEL_BOE_HIMAX8279D appears twice. Drop one of them (Sam)
- ADD static, set_gpios function is not used outside this module (Sam)

V4:
- Frefix all function maes with boe_ (Sam)
- Fsed "enable_gpio" replace "reset_gpio", Make it look clearer (Sam)
- Sort include lines alphabetically (Sam)
- Fixed entries in the makefile must be sorted alphabetically (Sam)
- Add send_mipi_cmds function to avoid duplicating the code (Sam)
- Add the necessary delay(reset_delay_t5) between reset and sending
    the initialization command (Rock wang)

V3:
- Remove unnecessary delays in sending initialization commands (Jitao Shi)

V2:
- Use SPDX identifier (Sam)
- Use necessary header files replace drmP.h (Sam)
- Delete unnecessary header files #include <linux/err.h> (Sam)
- Specifies a GPIOs array to control the reset timing,
    instead of reading "dsi-reset-sequence" data from DTS (Sam)
- Delete backlight_disable() function when already disabled (Sam)
- Use devm_of_find_backlight() replace of_find_backlight_by_node() (Sam)
- Move the necessary data in the DTS to the current file,
    like porch, display_mode and Init code etc. (Sam)
- Add compatible device "boe,himax8279d10p" (Sam)

V1:
- Support Boe Himax8279d 8.0" 1200x1920 TFT LCD panel, it is a MIPI DSI
    panel.

Signed-off-by: Jerry Han <jerry.han.hq@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Jitao Shi <jitao.shi@mediatek.com>
Cc: Rock wang <rock_wang@himax.com.cn>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> [fixed boe_panel_get_modes + backlight]
Link: https://patchwork.freedesktop.org/patch/msgid/20191212115208.3878-1-jerry.han.hq@gmail.com

This panel is used on the OMAP3 Pandora.

The code is based on the omapdrm-specific panel-tpo-td043mtea1 driver.

v2:
- fix checkpatch warnings
  o (lcd == NULL) => (!lcd) (sam)
  o alignment to open '(' (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-10-laurent.pinchart@ideasonboard.com

This panel is used on the OpenMoko Neo FreeRunner and Neo 1973.

The code is based on the omapdrm-specific panel-tpo-td028ttec1 driver.

v2:
- fix checkpatch warnings:
  o (lcd == NULL) => (!lcd) (sam)
  o (1 << X) => BIT(X) (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-9-laurent.pinchart@ideasonboard.com

This panel is used on the Nokia N900.

The code is based on the omapdrm-specific panel-sony-acx565akm driver.
The hardware-related logic has been changed as little as possible to
avoid regressions as hardware availability is lacking to test the
changes. Follow-up patches should address the items listed in the TODO
list.

v2:
- fix checkpatch warning (lcd == NULL) => (!lcd) (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-8-laurent.pinchart@ideasonboard.com

This panel is used on the TI SDP3430 board.

The code is based on the omapdrm-specific panel-sharp-ls037v7dw01
driver.

v2:
- fix checkpatch warning (lcd == NULL) => (!lcd) (sam)
- drop __exit_p() from remove. It caused a build warning.
  And no other panel drivers needs this (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-7-laurent.pinchart@ideasonboard.com

This panel is used on the Zoom2/3/3630 SDP boards.

The code is based on the omapdrm-specific panel-nec-nl8048hl11 driver

v2:
- fix checkpatch warning (lcd == NULL) => (!lcd) (sam)

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-6-laurent.pinchart@ideasonboard.com

This panel is used on the Gumstix Overo Palo35.

The code is based on the omapdrm-specific panel-lgphilips-lb035q02
driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-5-laurent.pinchart@ideasonboard.com

This patch adds Raydium RM67191 TFT LCD panel driver (MIPI-DSI
protocol).

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1561550907-9733-3-git-send-email-robert.chiras@nxp.com

Add support for display panels built around the Novatek NT39016 display
controller, as found on e.g. the King Display KD035G6-54NT 24-bit
320x240 3.5" LCD panel which equips the GCW Zero open-source handheld
gaming console.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190603152555.23527-2-paul@crapouillou.net

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The panel is similar to OSD101T2045-53TS (which is handled by panel-simple)
with one big difference: osd101t2587-53ts needs MIPI_DSI_TURN_ON_PERIPHERAL
message to be sent from the host to be operational and thus can not be
handled by panel-simple.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190226075523.28997-5-peter.ujfalusi@ti.com

This patch adds Samsung S6E63M0 AMOLED LCD panel driver, connected over
spi. It's based on already removed, non-device-tree S6E63M0 driver and
panel-samsung-ld9040. It can be found for example in some of Samsung
Aries based phones.

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190222175153.20567-2-pawel.mikolaj.chmiel@gmail.com

Support Rocktech jh057n00900 5.5" 720x1440 TFT LCD panel. It is a MIPI
DSI video mode panel.

The panel seems to use a Sitronix ST7703 look alike (most of the
commands look similar to the ST7703's data sheet but use a different
number of parameters). The initial version of the DSI init sequence
(including sleeps) were provided by the vendor. Sleeps were reduced
considerably though to speed up initialization.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1a9ce687be283c66dfb26d1dfb52a7bf695090fa.1554114302.git.agx@sigxcpu.org

Feiyang FY07024DI26A30-D is 1024x600, 4-lane MIPI-DSI LCD panel.

Add panel driver for it.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Bhushan Shah <bshah@kde.org>
Tested-by: Merlijn Wajer <merlijn@wizzup.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190212204109.3528-2-jagan@amarulasolutions.com

The Ronbo RB070D30 panel is a MIPI-DSI panel based on a Fitipower EK79007
controller and a 1024x600 panel.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Konstantin Sudakov <k.sudakov@integrasources.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3cc43c6051e89a52434053a38a36621acab7236e.1550650810.git-series.maxime.ripard@bootlin.com

Support Kingdisplay KD097D04 9.7" 1536x2048 TFT LCD panel, it is a MIPI
dual-DSI panel.

v4-resend:
- Thierry noted missing dt-bindings for v4 but forgot that he
  already had applied them one kernel release back in
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ebc950fdff6d5f9250cd5a5a348af97f7d8508df


v4:
- address Philipp's comments
  - real range for usleep_range and
  - poweroff ordering in kingdisplay_panel_prepare
  - return value beautification in panel_probe
- update author naming for full name
v3:
- address Thierry's comments
  - error handling for init dsi writes in init
  - unconditionally remove the panel
  - don't use drm_panel_detach
  - a bit of variable signednes wiggling
- I did talk to ChromeOS people and the delays really should be as short
  as possible, so dropped the 100ms from the delay comments
v2:
- update timing + cmds from chromeos kernel
- new backlight API including switch to devm_of_find_backlight
- fix most of Sean Paul's comments
  enable/prepare tracking seems something all panels do
- document origins of the init sequence
- lanes per dsi interface to 4 (two interfaces). Matches how tegra
  and pending rockchip dual-dsi handle (dual-)dsi lanes
- spdx header instead of license boilerplate

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181030091528.28211-1-heiko@sntech.de

ST7701 designed for small and medium sizes of TFT LCD display, is
capable of supporting up to 480RGBX864 in resolution. It provides
several system interfaces like MIPI/RGB/SPI.

Currently added support for Techstar TS8550B which is ST7701 based
480x854, 2-lane MIPI DSI LCD panel.

Driver now registering mipi_dsi device, but indeed it can extendable
for RGB if any requirement trigger in future.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190124215131.17452-2-jagan@amarulasolutions.com