> -----Original Message-----
> From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Friday, March 29, 2024 6:43 AM
> To: intel-gfx@lists.freedesktop.org
> Subject: [PATCH 11/22] drm/i915/mst: Check intel_dp_joiner_needs_dsc()
>
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> intel_dp_mst_compute_config() is missing the "does the joiner need DSC?" check
> despite claiming to have a lot of other joiner/dsc stuff in there (albeit
> disabled).
> Replicate the logic from the SST side.
>
> TODO: refactor all this duplicated code!
Looks Good to me.
Reviewed-by: Uma Shankar <uma.shan...@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dp_mst.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index 6da031f9724d..1cf6241a7d53 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -532,7 +532,7 @@ static int intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
> const struct drm_display_mode *adjusted_mode =
> &pipe_config->hw.adjusted_mode;
> struct link_config_limits limits;
> - bool dsc_needed;
> + bool dsc_needed, joiner_needs_dsc;
> int ret = 0;
>
> if (pipe_config->fec_enable &&
> @@ -546,7 +546,9 @@ static int intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
> pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
> pipe_config->has_pch_encoder = false;
>
> - dsc_needed = intel_dp->force_dsc_en ||
> + joiner_needs_dsc = intel_dp_joiner_needs_dsc(dev_priv,
> +pipe_config->bigjoiner_pipes);
> +
> + dsc_needed = joiner_needs_dsc || intel_dp->force_dsc_en ||
> !intel_dp_mst_compute_config_limits(intel_dp,
> connector,
> pipe_config,
> @@ -566,8 +568,8 @@ static int intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
>
> /* enable compression if the mode doesn't fit available BW */
> if (dsc_needed) {
> - drm_dbg_kms(&dev_priv->drm, "Try DSC (fallback=%s,
> force=%s)\n",
> - str_yes_no(ret),
> + drm_dbg_kms(&dev_priv->drm, "Try DSC (fallback=%s,
> joiner=%s, force=%s)\n",
> + str_yes_no(ret), str_yes_no(joiner_needs_dsc),
> str_yes_no(intel_dp->force_dsc_en));
>
> if (!intel_dp_mst_dsc_source_support(pipe_config))
> --
> 2.43.2
