[PATCH] drm/i915/dp: Fallback to DSC for HDR content if needed

[Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>]

If user-space has enabled HDR by passing HDR metadata and we can't support
10bpc fallback to DSC.

Now that we need the helper to determine the presence of HDR metadata at
multiple places make it non static.

Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c          | 16 ++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.h          |  1 +
 .../drm/i915/display/intel_dp_aux_backlight.c    | 13 -------------
 3 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f48912f308df..abbba159e479 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1774,6 +1774,9 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 	     bpp -= 2 * 3) {
 		int link_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);
 
+		if (intel_dp_in_hdr_mode(conn_state) && bpp < 30)
+			return -EINVAL;
+
 		mode_rate = intel_dp_link_required(clock, link_bpp);
 
 		for (i = 0; i < intel_dp->num_common_rates; i++) {
@@ -2910,6 +2913,19 @@ static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
 	}
 }
 
+bool
+intel_dp_in_hdr_mode(const struct drm_connector_state *conn_state)
+{
+	struct hdr_output_metadata *hdr_metadata;
+
+	if (!conn_state->hdr_output_metadata)
+		return false;
+
+	hdr_metadata = conn_state->hdr_output_metadata->data;
+
+	return hdr_metadata->hdmi_metadata_type1.eotf == HDMI_EOTF_SMPTE_ST2084;
+}
+
 static void
 intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
 					    struct intel_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 0657f5681196..5def589e3c0e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -214,5 +214,6 @@ int intel_dp_compute_min_hblank(struct intel_crtc_state *crtc_state,
 
 int intel_dp_dsc_bpp_step_x16(const struct intel_connector *connector);
 void intel_dp_dpcd_set_probe(struct intel_dp *intel_dp, bool force_on_external);
+bool intel_dp_in_hdr_mode(const struct drm_connector_state *conn_state);
 
 #endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index 41228478b21c..12084a542fc5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -225,19 +225,6 @@ intel_dp_aux_hdr_set_aux_backlight(const struct drm_connector_state *conn_state,
 			connector->base.base.id, connector->base.name);
 }
 
-static bool
-intel_dp_in_hdr_mode(const struct drm_connector_state *conn_state)
-{
-	struct hdr_output_metadata *hdr_metadata;
-
-	if (!conn_state->hdr_output_metadata)
-		return false;
-
-	hdr_metadata = conn_state->hdr_output_metadata->data;
-
-	return hdr_metadata->hdmi_metadata_type1.eotf == HDMI_EOTF_SMPTE_ST2084;
-}
-
 static void
 intel_dp_aux_hdr_set_backlight(const struct drm_connector_state *conn_state, u32 level)
 {
-- 
2.25.1