This is a note to let you know that I've just added the patch titled

drm: bridge: fix LONTIUM use of mipi_dsi_() functions

to the 5.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summ...

The filename of the patch is: drm-bridge-fix-lontium-use-of-mipi_dsi_-functions.patch and it can be found in the queue-5.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From ad085b3a712a89e4a48472121b231add7a8362e4 Mon Sep 17 00:00:00 2001

From: Randy Dunlap rdunlap@infradead.org Date: Thu, 15 Apr 2021 11:36:39 -0700 Subject: drm: bridge: fix LONTIUM use of mipi_dsi_() functions

From: Randy Dunlap rdunlap@infradead.org

commit ad085b3a712a89e4a48472121b231add7a8362e4 upstream.

The Lontium DRM bridge drivers use mipi_dsi_() function interfaces so they need to select DRM_MIPI_DSI to prevent build errors.

ERROR: modpost: "mipi_dsi_attach" [drivers/gpu/drm/bridge/lontium-lt9611uxc.ko] undefined! ERROR: modpost: "mipi_dsi_device_register_full" [drivers/gpu/drm/bridge/lontium-lt9611uxc.ko] undefined! ERROR: modpost: "of_find_mipi_dsi_host_by_node" [drivers/gpu/drm/bridge/lontium-lt9611uxc.ko] undefined! ERROR: modpost: "mipi_dsi_device_unregister" [drivers/gpu/drm/bridge/lontium-lt9611uxc.ko] undefined! ERROR: modpost: "mipi_dsi_detach" [drivers/gpu/drm/bridge/lontium-lt9611uxc.ko] undefined! ERROR: modpost: "mipi_dsi_attach" [drivers/gpu/drm/bridge/lontium-lt9611.ko] undefined! ERROR: modpost: "mipi_dsi_device_register_full" [drivers/gpu/drm/bridge/lontium-lt9611.ko] undefined! ERROR: modpost: "of_find_mipi_dsi_host_by_node" [drivers/gpu/drm/bridge/lontium-lt9611.ko] undefined! ERROR: modpost: "mipi_dsi_device_unregister" [drivers/gpu/drm/bridge/lontium-lt9611.ko] undefined! ERROR: modpost: "mipi_dsi_detach" [drivers/gpu/drm/bridge/lontium-lt9611.ko] undefined! WARNING: modpost: suppressed 5 unresolved symbol warnings because there were too many)

Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge") Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge") Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge") Reported-by: kernel test robot lkp@intel.com Signed-off-by: Randy Dunlap rdunlap@infradead.org Reviewed-by: Adren Grassein adrien.grassein@gmail.com Cc: Dmitry Baryshkov dmitry.baryshkov@linaro.org Cc: Sam Ravnborg sam@ravnborg.org Cc: Vinod Koul vkoul@kernel.org Cc: Bjorn Andersson bjorn.andersson@linaro.org Cc: Srinivas Kandagatla srinivas.kandagatla@linaro.org Cc: Adrien Grassein adrien.grassein@gmail.com Cc: Andrzej Hajda a.hajda@samsung.com Cc: Neil Armstrong narmstrong@baylibre.com Cc: Robert Foss robert.foss@linaro.org Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org Signed-off-by: Robert Foss robert.foss@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20210415183639.1487-1-rdunlap@... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/bridge/Kconfig | 3 +++ 1 file changed, 3 insertions(+)

--- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -67,6 +67,7 @@ config DRM_LONTIUM_LT9611UXC depends on OF select DRM_PANEL_BRIDGE select DRM_KMS_HELPER + select DRM_MIPI_DSI select REGMAP_I2C help Driver for Lontium LT9611UXC DSI to HDMI bridge @@ -151,6 +152,7 @@ config DRM_SII902X tristate "Silicon Image sii902x RGB/HDMI bridge" depends on OF select DRM_KMS_HELPER + select DRM_MIPI_DSI select REGMAP_I2C select I2C_MUX select SND_SOC_HDMI_CODEC if SND_SOC @@ -200,6 +202,7 @@ config DRM_TOSHIBA_TC358767 tristate "Toshiba TC358767 eDP bridge" depends on OF select DRM_KMS_HELPER + select DRM_MIPI_DSI select REGMAP_I2C select DRM_PANEL help

Patches currently in stable-queue which might be from rdunlap@infradead.org are

queue-5.12/drm-bridge-fix-lontium-use-of-mipi_dsi_-functions.patch