[ Upstream commit d0375f6858c4ff7244b62b02eb5e93428e1916cd ] Fix the NULL pointer dereference when no monitor is connected, and the sound card is opened from userspace. Instead return an empty buffer (of zeroes) as the EDID information to the sound framework if there is no connector attached. Fixes: e0fd83dbe924 ("drm: bridge: it66121: Add audio support") Reported-by: Nishanth Menon <nm@ti.com> Closes: https://lore.kernel.org/all/20230825105849.crhon42qndxqif4i@gondola/ Reviewed-by: Helen Koike <helen.koike@collabora.com> Signed-off-by: Jai Luthra <j-luthra@ti.com> Tested-by: Nishanth Menon <nm@ti.com> Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com> Signed-off-by: Robert Foss <rfoss@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230901-it66121_edid-v2-1-aa59605336b9@ti.com Signed-off-by: Sasha Levin <sashal@kernel.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.
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