[PATCH v4 RESEND] drm/panel: add Kingdisplay kd097d04 panel driver

[Thierry Reding]

On Tue, Oct 30, 2018 at 10:15:28AM +0100, Heiko Stuebner wrote:
> From: Nickey Yang <nickey.yang at rock-chips.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 at rock-chips.com>
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> ---
>  drivers/gpu/drm/panel/Kconfig                 |  11 +
>  drivers/gpu/drm/panel/Makefile                |   1 +
>  .../drm/panel/panel-kingdisplay-kd097d04.c    | 473 ++++++++++++++++++
>  3 files changed, 485 insertions(+)
>  create mode 100644 drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c

Applied to drm-misc-next, thanks.

Thierry
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