On Tue, Mar 14, 2023 at 04:34:09PM +0530, Ankit Nautiyal wrote:
> Check for MODE_H_ILLEGAL before calculating max rates, lanes etc.
> Move comments about compressed bpp U6.4 format closer to where it is used.
>
> Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index b49d113357e4..dcb3c2519041 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1098,6 +1098,9 @@ intel_dp_mode_valid(struct drm_connector *_connector,
> if (target_clock > max_dotclk)
> return MODE_CLOCK_HIGH;
>
> + if (intel_dp_hdisplay_bad(dev_priv, mode->hdisplay))
> + return MODE_H_ILLEGAL;
> +
> max_link_clock = intel_dp_max_link_rate(intel_dp);
> max_lanes = intel_dp_max_lane_count(intel_dp);
>
> @@ -1105,13 +1108,6 @@ intel_dp_mode_valid(struct drm_connector *_connector,
> mode_rate = intel_dp_link_required(target_clock,
>
> intel_dp_mode_min_output_bpp(connector, mode));
>
> - if (intel_dp_hdisplay_bad(dev_priv, mode->hdisplay))
> - return MODE_H_ILLEGAL;
> -
> - /*
> - * Output bpp is stored in 6.4 format so right shift by 4 to get the
> - * integer value since we support only integer values of bpp.
> - */
> if (HAS_DSC(dev_priv) &&
> drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
> /*
> @@ -1120,6 +1116,10 @@ intel_dp_mode_valid(struct drm_connector *_connector,
> */
> int pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, U8_MAX);
>
> + /*
> + * Output bpp is stored in 6.4 format so right shift by 4 to
> get the
> + * integer value since we support only integer values of bpp.
> + */
> if (intel_dp_is_edp(intel_dp)) {
> dsc_max_output_bpp =
> drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd)
> >> 4;
> --
> 2.25.1
--
Ville Syrjälä
Intel
