drm/msm: Fix removal of valid error case when checking speed_bin

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 <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: Jordan Crouse <[email protected]>
Cc: Eric Anholt <[email protected]>
Cc: Douglas Anderson <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bjorn Andersson <[email protected]>
Cc: YongQin Liu <[email protected]>
Reported-by: YongQin Liu <[email protected]>
Fixes: 7bf168c8fe8c  ("drm/msm: Fix speed-bin support not to access outside valid memory")
Signed-off-by: John Stultz <[email protected]>
Reviewed-by: Akhil P Oommen <[email protected]>
Reviewed-by: Douglas Anderson <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Rob Clark <[email protected]>

0 files changed, 0 insertions, 0 deletions