drm/panel: Add support for OTM8009A panel driver

This patch adds Orise Tech OTM8009A 3.97" 480x800 TFT LCD
panel driver (MIPI-DSI video mode). The panel backlight is
managed through the DSI link. This panel driver is used in
several STM32 boards.
Signed-off-by: Philippe CORNU <philippe.cornu@st.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1500297593-30633-4-git-send-email-philippe.cornu@st.com

drivers/gpu/drm/panel/Kconfig

@@ -63,6 +63,15 @@ config DRM_PANEL_LG_LG4573
 	  Say Y here if you want to enable support for LG4573 RGB panel.
 	  To compile this driver as a module, choose M here.
 
+config DRM_PANEL_ORISETECH_OTM8009A
+	tristate "Orise Technology otm8009a 480x800 dsi 2dl panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for Orise Technology
+	  otm8009a 480x800 dsi 2dl panel.
+
 config DRM_PANEL_PANASONIC_VVX10F034N00
 	tristate "Panasonic VVX10F034N00 1920x1200 video mode panel"
 	depends on OF

drivers/gpu/drm/panel/Makefile

@@ -3,6 +3,7 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
 obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
 obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
+obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
 obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o