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SubjectRe: [PATCH v5 21/36] drm/bridge: analogix_dp: Fix timeout of video streamclk config
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On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
> From: zain wang <wzz@rock-chips.com>
>
> The STRM_VALID bit in register ANALOGIX_DP_SYS_CTL_3 may be unstable,
> so we may hit the error log "Timeout of video streamclk ok" since
> checked this unstable bit.
> In fact, we can go continue and the streamclk is ok if we wait enough time,
> it does no effect on display.
> Let's change this error to warn.

Reviewed-by: Archit Taneja <architt@codeaurora.org>

Thanks,
Archit

>
> Cc: Douglas Anderson <dianders@chromium.org>
> Signed-off-by: zain wang <wzz@rock-chips.com>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 1f1cb624414d..d76e1652b1fd 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -921,8 +921,9 @@ static int analogix_dp_config_video(struct analogix_dp_device *dp)
> done_count = 0;
> }
> if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
> - dev_err(dp->dev, "Timeout of video streamclk ok\n");
> - return -ETIMEDOUT;
> + dev_warn(dp->dev,
> + "Ignoring timeout of video streamclk ok\n");
> + break;
> }
>
> usleep_range(1000, 1001);
>

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