Hi,
On Mon, Mar 29, 2021 at 6:34 PM John Stultz <john.stu...@linaro.org> wrote:
>
> Commit 7bf168c8fe8c ("drm/msm: Fix speed-bin support not to
> access outside valid memory"), reworked the nvmem reading of
> "speed_bin", but in doing so dropped handling of the -ENOENT
> case which was previously documented as "fine".
>
> That change resulted in the db845c board display to fail to
> start, with the following error:
>
> adreno 5000000.gpu: [drm:a6xx_gpu_init] *ERROR* failed to read speed-bin
> (-2). Some OPPs may not be supported by hardware
>
> Thus, this patch simply re-adds the ENOENT handling so the lack
> of the speed_bin entry isn't fatal for display, and gets things
> working on db845c.
>
> Cc: Rob Clark <robdcl...@gmail.com>
> Cc: Sean Paul <s...@poorly.run>
> Cc: Jordan Crouse <jcro...@codeaurora.org>
> Cc: Eric Anholt <e...@anholt.net>
> Cc: Douglas Anderson <diand...@chromium.org>
> Cc: linux-arm-...@vger.kernel.org
> Cc: freedr...@lists.freedesktop.org
> Cc: Bjorn Andersson <bjorn.anders...@linaro.org>
> Cc: YongQin Liu <yongqin....@linaro.org>
> Reported-by: YongQin Liu <yongqin....@linaro.org>
> Fixes: 7bf168c8fe8c ("drm/msm: Fix speed-bin support not to access outside
> valid memory")
> Signed-off-by: John Stultz <john.stu...@linaro.org>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
Reviewed-by: Douglas Anderson <diand...@chromium.org>
