drm/bridge: add Silicon Image SiI8620 driver

SiI8620 transmitter converts eTMDS/HDMI signal to MHL 3.0.
It is controlled via I2C bus. Its interaction with other
devices in video pipeline is performed mainly on HW level.
The only interaction it does on device driver level is
filtering-out unsupported video modes, it exposes drm_bridge
interface to perform this operation.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1476085157-5266-1-git-send-email-a.hajda@samsung.com

drivers/gpu/drm/bridge/Kconfig

@@ -57,6 +57,13 @@ config DRM_PARADE_PS8622
 	---help---
 	  Parade eDP-LVDS bridge chip driver.
 
+config DRM_SIL_SII8620
+	tristate "Silicon Image SII8620 HDMI/MHL bridge"
+	depends on OF
+	select DRM_KMS_HELPER
+	help
+	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
+
 config DRM_SII902X
 	tristate "Silicon Image sii902x RGB/HDMI bridge"
 	depends on OF

drivers/gpu/drm/bridge/Makefile

@@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o
 obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o
 obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
+obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
 obj-$(CONFIG_DRM_SII902X) += sii902x.o
 obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
 obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/