Re: [PATCH] drm/bridge: analogix_dp: Downgrade "Link Training" messages to dev_dbg

From: Laurent Pinchart
Date: Sun Aug 05 2018 - 16:50:58 EST


Hi Marc,

Thank you for the patch.

On Sunday, 5 August 2018 20:28:57 EEST Marc Zyngier wrote:
> The Analogix DP bridge driver is pretty verbose, and outputs
> things like
>
> [ 619.414067] rockchip-dp ff970000.edp: Link Training Clock Recovery
> success [ 619.429233] rockchip-dp ff970000.edp: Link Training success!
>
> each time the display gets unblanked. While it is good to know
> that the device is behaving correctly, users already know that
> because they can see some video output.
>
> Let's keep these messages for cases where we need to actually
> debug the driver (we have dynamic debug to enable them at runtime
> if need be), and let's keep the kernel quiet otherwise.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>

Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

> ---
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 4 ++--
> 1 file changed, 2 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
> 2bcbfadb6ac5..0d715a375ff9 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -554,7 +554,7 @@ static int analogix_dp_process_clock_recovery(struct
> analogix_dp_device *dp)
> if (retval < 0)
> return retval;
>
> - dev_info(dp->dev, "Link Training Clock Recovery success\n");
> + dev_dbg(dp->dev, "Link Training Clock Recovery success\n");
> dp->link_train.lt_state = EQUALIZER_TRAINING;
> } else {
> for (lane = 0; lane < lane_count; lane++) {
> @@ -634,7 +634,7 @@ static int analogix_dp_process_equalizer_training(struct
> analogix_dp_device *dp)
> if (retval < 0)
> return retval;
>
> - dev_info(dp->dev, "Link Training success!\n");
> + dev_dbg(dp->dev, "Link Training success!\n");
> analogix_dp_get_link_bandwidth(dp, &reg);
> dp->link_train.link_rate = reg;
> dev_dbg(dp->dev, "final bandwidth = %.2x\n",

--
Regards,

Laurent Pinchart