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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:23278bf54a("drm/bridge: Introduce LT9611 DSI to HDMI bridge") Fixes:0cbbd5b1a0("drm: bridge: add support for lontium LT9611UXC bridge") Fixes:30e2ae943c("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@infradead.org
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.