On Fri, 15 Sept 2023 at 23:45, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote: > > dsi_wait4video_done() API waits for the DSI video mode engine to > become idle so that we can transmit the DCS commands in the > beginning of BLLP. However, with the current sequence, the MDP > timing engine is turned on after the panel's pre_enable() callback > which can send out the DCS commands needed to power up the panel. > > During those cases, this API will always timeout and print out the > error spam leading to long bootup times and log flooding. > > Fix this by checking if the DSI video engine was actually busy before > waiting for it to become idle otherwise this is a redundant wait. > > changes in v2: > - move the reg read below the video mode check > - minor fixes in commit text > > Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/34 > Fixes: a689554ba6ed ("drm/msm: Initial add DSI connector support") > Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> > --- > drivers/gpu/drm/msm/dsi/dsi_host.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > -- With best wishes Dmitry
