On Thu, 19 Mar 2015, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> When doing a native or i2c aux write the sink will indicate the number
> of bytes written even if it the nacks the transfer. When we receive a
> nack we just return an error upwards, but it might still be interesting
> to see how many bytes made it before the nack. So include that information
> in the debug messages.
>
> v2: Also print the message size (Jani)
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_dp_helper.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index d5368ea..71dcbc6 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -462,7 +462,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
> break;
>
> case DP_AUX_NATIVE_REPLY_NACK:
> - DRM_DEBUG_KMS("native nack\n");
> + DRM_DEBUG_KMS("native nack (result=%d, size=%zu)\n", ret, msg->size);
> return -EREMOTEIO;
>
> case DP_AUX_NATIVE_REPLY_DEFER:
> @@ -493,7 +493,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
> return ret;
>
> case DP_AUX_I2C_REPLY_NACK:
> - DRM_DEBUG_KMS("I2C nack\n");
> + DRM_DEBUG_KMS("I2C nack (result=%d, size=%zu\n", ret, msg->size);
> aux->i2c_nack_count++;
> return -EREMOTEIO;
>
> --
> 2.0.5
>
--
Jani Nikula, Intel Open Source Technology Center
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