Stephen Boyd e305f678e9 drm/msm/dp: Handle aux timeouts, nacks, defers
Let's look at the irq status bits after a transfer and see if we got a
nack or a defer or a timeout, instead of telling drm layers that
everything was fine, while still printing an error message. I wasn't
sure about NACK+DEFER so I lumped all those various errors along with a
nack so that the drm core can figure out that things are just not going
well. The important thing is that we're now returning -ETIMEDOUT when
the message times out and nacks for bad addresses.

Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Cc: Kuogee Hsieh <khsieh@codeaurora.org>
Cc: aravindh@codeaurora.org
Cc: Sean Paul <sean@poorly.run>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Kuogee Hsieh <khsieh@codeaurora.org>
Link: https://lore.kernel.org/r/20210507212505.1224111-4-swboyd@chromium.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
2021-06-23 07:32:15 -07:00
2021-05-23 11:42:48 -10:00

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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