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Jonas Karlman a5d024541e drm/rockchip: dw_hdmi: Fix reading EDID when using a forced mode
EDID cannot be read on RK3328 until after read_hpd has been called and
correct io voltage has been configured based on connection status.

When a forced mode is used, e.g. video=1920x1080@60e, the connector
detect ops, that in turn normally calls the read_hpd, never gets called.

This result in reading EDID to fail in connector get_modes ops.

Call dw_hdmi_rk3328_read_hpd at end of dw_hdmi_rk3328_setup_hpd to
correct io voltage and allow reading EDID after setup_hpd.

Fixes: 1c53ba8f22 ("drm/rockchip: dw_hdmi: add dw-hdmi support for the rk3328")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240615170417.3134517-5-jonas@kwiboo.se
History 2024-08-15 19:27:36 +02:00
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README

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 reStructuredText 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.