Merge tag 'drm-intel-next-2023-10-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

- Add new DG2 PCI IDs (Shekhar)
- Remove watchdog timers for PSR on Lunar Lake (Mika Kahola)
- DSB changes for proper handling of LUT programming (Ville)
- Store DSC DPCD capabilities in the connector (Imre)
- Clean up zero initializers (Ville)
- Remove Meteor Lake force_probe protection (RK)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZTFW4g6duLtp+Wy0@intel.com

18 files changed, 230 insertions, 152 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index 9df78e7caa2b..0aa3999374e2 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -153,7 +153,7 @@ static acpi_handle intel_dsm_pci_probe(struct pci_dev *pdev)
 static bool intel_dsm_detect(void)
 {
 	acpi_handle dhandle = NULL;
-	char acpi_method_name[255] = { 0 };
+	char acpi_method_name[255] = {};
 	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
 	struct pci_dev *pdev = NULL;
 	int vga_count = 0;
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 2a2a163ea652..1d26be54ddfc 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1895,9 +1895,6 @@ void intel_color_prepare_commit(struct intel_crtc_state *crtc_state)
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 
-	/* FIXME DSB has issues loading LUTs, disable it for now */
-	return;
-
 	if (!crtc_state->hw.active ||
 	    intel_crtc_needs_modeset(crtc_state))
 		return;
diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 6e6a1818071e..d414f6b7f993 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -3009,7 +3009,7 @@ void intel_c10pll_state_verify(struct intel_atomic_state *state,
 	struct drm_i915_private *i915 = to_i915(state->base.dev);
 	const struct intel_crtc_state *new_crtc_state =
 		intel_atomic_get_new_crtc_state(state, crtc);
-	struct intel_c10pll_state mpllb_hw_state = { 0 };
+	struct intel_c10pll_state mpllb_hw_state = {};
 	const struct intel_c10pll_state *mpllb_sw_state = &new_crtc_state->cx0pll_state.c10;
 	struct intel_encoder *encoder;
 	enum phy phy;
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index fbe75d47a165..2836826f8c05 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1191,8 +1191,8 @@ DEFINE_SHOW_ATTRIBUTE(i915_lpsp_capability);
 
 static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
 {
-	struct drm_connector *connector = m->private;
-	struct drm_device *dev = connector->dev;
+	struct intel_connector *connector = to_intel_connector(m->private);
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct drm_crtc *crtc;
 	struct intel_dp *intel_dp;
 	struct drm_modeset_acquire_ctx ctx;
@@ -1204,7 +1204,7 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
 
 	do {
 		try_again = false;
-		ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
+		ret = drm_modeset_lock(&i915->drm.mode_config.connection_mutex,
 				       &ctx);
 		if (ret) {
 			if (ret == -EDEADLK && !drm_modeset_backoff(&ctx)) {
@@ -1213,8 +1213,8 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
 			}
 			break;
 		}
-		crtc = connector->state->crtc;
-		if (connector->status != connector_status_connected || !crtc) {
+		crtc = connector->base.state->crtc;
+		if (connector->base.status != connector_status_connected || !crtc) {
 			ret = -ENODEV;
 			break;
 		}
@@ -1229,24 +1229,24 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
 		} else if (ret) {
 			break;
 		}
-		intel_dp = intel_attached_dp(to_intel_connector(connector));
+		intel_dp = intel_attached_dp(connector);
 		crtc_state = to_intel_crtc_state(crtc->state);
 		seq_printf(m, "DSC_Enabled: %s\n",
 			   str_yes_no(crtc_state->dsc.compression_enable));
 		seq_printf(m, "DSC_Sink_Support: %s\n",
-			   str_yes_no(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
+			   str_yes_no(drm_dp_sink_supports_dsc(connector->dp.dsc_dpcd)));
 		seq_printf(m, "DSC_Output_Format_Sink_Support: RGB: %s YCBCR420: %s YCBCR444: %s\n",
-			   str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+			   str_yes_no(drm_dp_dsc_sink_supports_format(connector->dp.dsc_dpcd,
 								      DP_DSC_RGB)),
-			   str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+			   str_yes_no(drm_dp_dsc_sink_supports_format(connector->dp.dsc_dpcd,
 								      DP_DSC_YCbCr420_Native)),
-			   str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd,
+			   str_yes_no(drm_dp_dsc_sink_supports_format(connector->dp.dsc_dpcd,
 								      DP_DSC_YCbCr444)));
 		seq_printf(m, "Force_DSC_Enable: %s\n",
 			   str_yes_no(intel_dp->force_dsc_en));
 		if (!intel_dp_is_edp(intel_dp))
 			seq_printf(m, "FEC_Sink_Support: %s\n",
-				   str_yes_no(drm_dp_sink_supports_fec(intel_dp->fec_capable)));
+				   str_yes_no(drm_dp_sink_supports_fec(connector->dp.fec_capability)));
 	} while (try_again);
 
 	drm_modeset_drop_locks(&ctx);
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..65ea37fe8cff 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -620,6 +620,12 @@ struct intel_connector {
 
 	struct intel_dp *mst_port;
 
+	struct {
+		struct drm_dp_aux *dsc_decompression_aux;
+		u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE];
+		u8 fec_capability;
+	} dp;
+
 	/* Work struct to schedule a uevent on link train failure */
 	struct work_struct modeset_retry_work;
 
@@ -1719,10 +1725,8 @@ struct intel_dp {
 	u8 psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
 	u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
 	u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE];
-	u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE];
 	u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE];
 	u8 lttpr_phy_caps[DP_MAX_LTTPR_COUNT][DP_LTTPR_PHY_CAP_SIZE];
-	u8 fec_capable;
 	u8 pcon_dsc_dpcd[DP_PCON_DSC_ENCODER_CAP_SIZE];
 	/* source rates */
 	int num_source_rates;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 4f6835a7578e..1891c0cc187d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -823,11 +823,11 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
 	return bits_per_pixel;
 }
 
-u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
+u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
 				int mode_clock, int mode_hdisplay,
 				bool bigjoiner)
 {
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	u8 min_slice_count, i;
 	int max_slice_width;
 
@@ -845,7 +845,7 @@ u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
 	if (mode_clock >= ((i915->display.cdclk.max_cdclk_freq * 85) / 100))
 		min_slice_count = max_t(u8, min_slice_count, 2);
 
-	max_slice_width = drm_dp_dsc_sink_max_slice_width(intel_dp->dsc_dpcd);
+	max_slice_width = drm_dp_dsc_sink_max_slice_width(connector->dp.dsc_dpcd);
 	if (max_slice_width < DP_DSC_MIN_SLICE_WIDTH_VALUE) {
 		drm_dbg_kms(&i915->drm,
 			    "Unsupported slice width %d by DP DSC Sink device\n",
@@ -862,7 +862,7 @@ u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
 		u8 test_slice_count = valid_dsc_slicecount[i] << bigjoiner;
 
 		if (test_slice_count >
-		    drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd, false))
+		    drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd, false))
 			break;
 
 		/* big joiner needs small joiner to be enabled */
@@ -1205,7 +1205,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 					   intel_dp_mode_min_output_bpp(connector, mode));
 
 	if (HAS_DSC(dev_priv) &&
-	    drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
+	    drm_dp_sink_supports_dsc(connector->dp.dsc_dpcd)) {
 		enum intel_output_format sink_format, output_format;
 		int pipe_bpp;
 
@@ -1215,7 +1215,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 		 * TBD pass the connector BPC,
 		 * for now U8_MAX so that max BPC on that platform would be picked
 		 */
-		pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp, U8_MAX);
+		pipe_bpp = intel_dp_dsc_compute_max_bpp(connector, U8_MAX);
 
 		/*
 		 * Output bpp is stored in 6.4 format so right shift by 4 to get the
@@ -1223,11 +1223,11 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 		 */
 		if (intel_dp_is_edp(intel_dp)) {
 			dsc_max_compressed_bpp =
-				drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4;
+				drm_edp_dsc_sink_output_bpp(connector->dp.dsc_dpcd) >> 4;
 			dsc_slice_count =
-				drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
+				drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd,
 								true);
-		} else if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
+		} else if (drm_dp_sink_supports_fec(connector->dp.fec_capability)) {
 			dsc_max_compressed_bpp =
 				intel_dp_dsc_get_max_compressed_bpp(dev_priv,
 								    max_link_clock,
@@ -1238,7 +1238,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 								    output_format,
 								    pipe_bpp, 64);
 			dsc_slice_count =
-				intel_dp_dsc_get_slice_count(intel_dp,
+				intel_dp_dsc_get_slice_count(connector,
 							     target_clock,
 							     mode->hdisplay,
 							     bigjoiner);
@@ -1370,20 +1370,21 @@ static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
 }
 
 static bool intel_dp_supports_fec(struct intel_dp *intel_dp,
+				  const struct intel_connector *connector,
 				  const struct intel_crtc_state *pipe_config)
 {
 	return intel_dp_source_supports_fec(intel_dp, pipe_config) &&
-		drm_dp_sink_supports_fec(intel_dp->fec_capable);
+		drm_dp_sink_supports_fec(connector->dp.fec_capability);
 }
 
-static bool intel_dp_supports_dsc(struct intel_dp *intel_dp,
+static bool intel_dp_supports_dsc(const struct intel_connector *connector,
 				  const struct intel_crtc_state *crtc_state)
 {
 	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP) && !crtc_state->fec_enable)
 		return false;
 
 	return intel_dsc_source_support(crtc_state) &&
-		drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd);
+		drm_dp_sink_supports_dsc(connector->dp.dsc_dpcd);
 }
 
 static int intel_dp_hdmi_compute_bpc(struct intel_dp *intel_dp,
@@ -1577,11 +1578,12 @@ u8 intel_dp_dsc_max_src_input_bpc(struct drm_i915_private *i915)
 	return 0;
 }
 
-int intel_dp_dsc_compute_max_bpp(struct intel_dp *intel_dp, u8 max_req_bpc)
+int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
+				 u8 max_req_bpc)
 {
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	int i, num_bpc;
-	u8 dsc_bpc[3] = {0};
+	u8 dsc_bpc[3] = {};
 	u8 dsc_max_bpc;
 
 	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(i915);
@@ -1591,7 +1593,7 @@ int intel_dp_dsc_compute_max_bpp(struct intel_dp *intel_dp, u8 max_req_bpc)
 
 	dsc_max_bpc = min_t(u8, dsc_max_bpc, max_req_bpc);
 
-	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd,
+	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
 						       dsc_bpc);
 	for (i = 0; i < num_bpc; i++) {
 		if (dsc_max_bpc >= dsc_bpc[i])
@@ -1601,16 +1603,14 @@ int intel_dp_dsc_compute_max_bpp(struct intel_dp *intel_dp, u8 max_req_bpc)
 	return 0;
 }
 
-static int intel_dp_source_dsc_version_minor(struct intel_dp *intel_dp)
+static int intel_dp_source_dsc_version_minor(struct drm_i915_private *i915)
 {
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
-
 	return DISPLAY_VER(i915) >= 14 ? 2 : 1;
 }
 
-static int intel_dp_sink_dsc_version_minor(struct intel_dp *intel_dp)
+static int intel_dp_sink_dsc_version_minor(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
 {
-	return (intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] & DP_DSC_MINOR_MASK) >>
+	return (dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] & DP_DSC_MINOR_MASK) >>
 		DP_DSC_MINOR_SHIFT;
 }
 
@@ -1636,11 +1636,10 @@ static int intel_dp_get_slice_height(int vactive)
 	return 2;
 }
 
-static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
+static int intel_dp_dsc_compute_params(const struct intel_connector *connector,
 				       struct intel_crtc_state *crtc_state)
 {
-	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
-	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
 	u8 line_buf_depth;
 	int ret;
@@ -1661,17 +1660,17 @@ static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
 		return ret;
 
 	vdsc_cfg->dsc_version_major =
-		(intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] &
+		(connector->dp.dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] &
 		 DP_DSC_MAJOR_MASK) >> DP_DSC_MAJOR_SHIFT;
 	vdsc_cfg->dsc_version_minor =
-		min(intel_dp_source_dsc_version_minor(intel_dp),
-		    intel_dp_sink_dsc_version_minor(intel_dp));
+		min(intel_dp_source_dsc_version_minor(i915),
+		    intel_dp_sink_dsc_version_minor(connector->dp.dsc_dpcd));
 	if (vdsc_cfg->convert_rgb)
 		vdsc_cfg->convert_rgb =
-			intel_dp->dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT] &
+			connector->dp.dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT] &
 			DP_DSC_RGB;
 
-	line_buf_depth = drm_dp_dsc_sink_line_buf_depth(intel_dp->dsc_dpcd);
+	line_buf_depth = drm_dp_dsc_sink_line_buf_depth(connector->dp.dsc_dpcd);
 	if (!line_buf_depth) {
 		drm_dbg_kms(&i915->drm,
 			    "DSC Sink Line Buffer Depth invalid\n");
@@ -1686,15 +1685,16 @@ static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
 			DSC_1_1_MAX_LINEBUF_DEPTH_BITS : line_buf_depth;
 
 	vdsc_cfg->block_pred_enable =
-		intel_dp->dsc_dpcd[DP_DSC_BLK_PREDICTION_SUPPORT - DP_DSC_SUPPORT] &
+		connector->dp.dsc_dpcd[DP_DSC_BLK_PREDICTION_SUPPORT - DP_DSC_SUPPORT] &
 		DP_DSC_BLK_PREDICTION_IS_SUPPORTED;
 
 	return drm_dsc_compute_rc_parameters(vdsc_cfg);
 }
 
-static bool intel_dp_dsc_supports_format(struct intel_dp *intel_dp,
+static bool intel_dp_dsc_supports_format(const struct intel_connector *connector,
 					 enum intel_output_format output_format)
 {
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	u8 sink_dsc_format;
 
 	switch (output_format) {
@@ -1705,8 +1705,8 @@ static bool intel_dp_dsc_supports_format(struct intel_dp *intel_dp,
 		sink_dsc_format = DP_DSC_YCbCr444;
 		break;
 	case INTEL_OUTPUT_FORMAT_YCBCR420:
-		if (min(intel_dp_source_dsc_version_minor(intel_dp),
-			intel_dp_sink_dsc_version_minor(intel_dp)) < 2)
+		if (min(intel_dp_source_dsc_version_minor(i915),
+			intel_dp_sink_dsc_version_minor(connector->dp.dsc_dpcd)) < 2)
 			return false;
 		sink_dsc_format = DP_DSC_YCbCr420_Native;
 		break;
@@ -1714,7 +1714,7 @@ static bool intel_dp_dsc_supports_format(struct intel_dp *intel_dp,
 		return false;
 	}
 
-	return drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd, sink_dsc_format);
+	return drm_dp_dsc_sink_supports_format(connector->dp.dsc_dpcd, sink_dsc_format);
 }
 
 static bool is_bw_sufficient_for_dsc_config(u16 compressed_bpp, u32 link_clock,
@@ -1765,11 +1765,11 @@ static int dsc_compute_link_config(struct intel_dp *intel_dp,
 }
 
 static
-u16 intel_dp_dsc_max_sink_compressed_bppx16(struct intel_dp *intel_dp,
+u16 intel_dp_dsc_max_sink_compressed_bppx16(const struct intel_connector *connector,
 					    struct intel_crtc_state *pipe_config,
 					    int bpc)
 {
-	u16 max_bppx16 = drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd);
+	u16 max_bppx16 = drm_edp_dsc_sink_output_bpp(connector->dp.dsc_dpcd);
 
 	if (max_bppx16)
 		return max_bppx16;
@@ -1808,11 +1808,11 @@ static int dsc_sink_min_compressed_bpp(struct intel_crtc_state *pipe_config)
 	return 0;
 }
 
-static int dsc_sink_max_compressed_bpp(struct intel_dp *intel_dp,
+static int dsc_sink_max_compressed_bpp(const struct intel_connector *connector,
 				       struct intel_crtc_state *pipe_config,
 				       int bpc)
 {
-	return intel_dp_dsc_max_sink_compressed_bppx16(intel_dp,
+	return intel_dp_dsc_max_sink_compressed_bppx16(connector,
 						       pipe_config, bpc) >> 4;
 }
 
@@ -1911,6 +1911,7 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp,
 }
 
 static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp,
+				      const struct intel_connector *connector,
 				      struct intel_crtc_state *pipe_config,
 				      struct link_config_limits *limits,
 				      int pipe_bpp,
@@ -1928,7 +1929,7 @@ static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp,
 	dsc_min_bpp = max(dsc_min_bpp, to_bpp_int_roundup(limits->link.min_bpp_x16));
 
 	dsc_src_max_bpp = dsc_src_max_compressed_bpp(intel_dp);
-	dsc_sink_max_bpp = dsc_sink_max_compressed_bpp(intel_dp, pipe_config, pipe_bpp / 3);
+	dsc_sink_max_bpp = dsc_sink_max_compressed_bpp(connector, pipe_config, pipe_bpp / 3);
 	dsc_max_bpp = dsc_sink_max_bpp ? min(dsc_sink_max_bpp, dsc_src_max_bpp) : dsc_src_max_bpp;
 
 	dsc_joiner_max_bpp = get_max_compressed_bpp_with_joiner(i915, adjusted_mode->clock,
@@ -2000,17 +2001,19 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 					 int timeslots)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	const struct intel_connector *connector =
+		to_intel_connector(conn_state->connector);
 	u8 max_req_bpc = conn_state->max_requested_bpc;
 	u8 dsc_max_bpc, dsc_max_bpp;
 	u8 dsc_min_bpc, dsc_min_bpp;
-	u8 dsc_bpc[3] = {0};
+	u8 dsc_bpc[3] = {};
 	int forced_bpp, pipe_bpp;
 	int num_bpc, i, ret;
 
 	forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp, conn_state, limits);
 
 	if (forced_bpp) {
-		ret = dsc_compute_compressed_bpp(intel_dp, pipe_config,
+		ret = dsc_compute_compressed_bpp(intel_dp, connector, pipe_config,
 						 limits, forced_bpp, timeslots);
 		if (ret == 0) {
 			pipe_config->pipe_bpp = forced_bpp;
@@ -2032,14 +2035,14 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 	 * Get the maximum DSC bpc that will be supported by any valid
 	 * link configuration and compressed bpp.
 	 */
-	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd, dsc_bpc);
+	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd, dsc_bpc);
 	for (i = 0; i < num_bpc; i++) {
 		pipe_bpp = dsc_bpc[i] * 3;
 		if (pipe_bpp < dsc_min_bpp)
 			break;
 		if (pipe_bpp > dsc_max_bpp)
 			continue;
-		ret = dsc_compute_compressed_bpp(intel_dp, pipe_config,
+		ret = dsc_compute_compressed_bpp(intel_dp, connector, pipe_config,
 						 limits, pipe_bpp, timeslots);
 		if (ret == 0) {
 			pipe_config->pipe_bpp = pipe_bpp;
@@ -2056,6 +2059,8 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 					  struct link_config_limits *limits)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct intel_connector *connector =
+		to_intel_connector(conn_state->connector);
 	int pipe_bpp, forced_bpp;
 	int dsc_src_min_bpp, dsc_sink_min_bpp, dsc_min_bpp;
 	int dsc_src_max_bpp, dsc_sink_max_bpp, dsc_max_bpp;
@@ -2068,7 +2073,7 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 		int max_bpc = min(limits->pipe.max_bpp / 3, (int)conn_state->max_requested_bpc);
 
 		/* For eDP use max bpp that can be supported with DSC. */
-		pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp, max_bpc);
+		pipe_bpp = intel_dp_dsc_compute_max_bpp(connector, max_bpc);
 		if (!is_dsc_pipe_bpp_sufficient(i915, conn_state, limits, pipe_bpp)) {
 			drm_dbg_kms(&i915->drm,
 				    "Computed BPC is not in DSC BPC limits\n");
@@ -2084,7 +2089,7 @@ static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 	dsc_min_bpp = max(dsc_min_bpp, to_bpp_int_roundup(limits->link.min_bpp_x16));
 
 	dsc_src_max_bpp = dsc_src_max_compressed_bpp(intel_dp);
-	dsc_sink_max_bpp = dsc_sink_max_compressed_bpp(intel_dp, pipe_config, pipe_bpp / 3);
+	dsc_sink_max_bpp = dsc_sink_max_compressed_bpp(connector, pipe_config, pipe_bpp / 3);
 	dsc_max_bpp = dsc_sink_max_bpp ? min(dsc_sink_max_bpp, dsc_src_max_bpp) : dsc_src_max_bpp;
 	dsc_max_bpp = min(dsc_max_bpp, to_bpp_int(limits->link.max_bpp_x16));
 
@@ -2107,17 +2112,19 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 {
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
+	const struct intel_connector *connector =
+		to_intel_connector(conn_state->connector);
 	const struct drm_display_mode *adjusted_mode =
 		&pipe_config->hw.adjusted_mode;
 	int ret;
 
 	pipe_config->fec_enable = !intel_dp_is_edp(intel_dp) &&
-		intel_dp_supports_fec(intel_dp, pipe_config);
+		intel_dp_supports_fec(intel_dp, connector, pipe_config);
 
-	if (!intel_dp_supports_dsc(intel_dp, pipe_config))
+	if (!intel_dp_supports_dsc(connector, pipe_config))
 		return -EINVAL;
 
-	if (!intel_dp_dsc_supports_format(intel_dp, pipe_config->output_format))
+	if (!intel_dp_dsc_supports_format(connector, pipe_config->output_format))
 		return -EINVAL;
 
 	/*
@@ -2143,7 +2150,7 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 	/* Calculate Slice count */
 	if (intel_dp_is_edp(intel_dp)) {
 		pipe_config->dsc.slice_count =
-			drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
+			drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd,
 							true);
 		if (!pipe_config->dsc.slice_count) {
 			drm_dbg_kms(&dev_priv->drm, "Unsupported Slice Count %d\n",
@@ -2154,7 +2161,7 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 		u8 dsc_dp_slice_count;
 
 		dsc_dp_slice_count =
-			intel_dp_dsc_get_slice_count(intel_dp,
+			intel_dp_dsc_get_slice_count(connector,
 						     adjusted_mode->crtc_clock,
 						     adjusted_mode->crtc_hdisplay,
 						     pipe_config->bigjoiner_pipes);
@@ -2174,7 +2181,7 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 	if (pipe_config->bigjoiner_pipes || pipe_config->dsc.slice_count > 1)
 		pipe_config->dsc.dsc_split = true;
 
-	ret = intel_dp_dsc_compute_params(&dig_port->base, pipe_config);
+	ret = intel_dp_dsc_compute_params(connector, pipe_config);
 	if (ret < 0) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "Cannot compute valid DSC parameters for Input Bpp = %d "
@@ -2933,7 +2940,7 @@ intel_edp_init_source_oui(struct intel_dp *intel_dp, bool careful)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	u8 oui[] = { 0x00, 0xaa, 0x01 };
-	u8 buf[3] = { 0 };
+	u8 buf[3] = {};
 
 	/*
 	 * During driver init, we want to be careful and avoid changing the source OUI if it's
@@ -3467,43 +3474,57 @@ bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
 	return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED;
 }
 
-static void intel_dp_get_dsc_sink_cap(struct intel_dp *intel_dp)
+static void intel_dp_read_dsc_dpcd(struct drm_dp_aux *aux,
+				   u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
 {
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	if (drm_dp_dpcd_read(aux, DP_DSC_SUPPORT, dsc_dpcd,
+			     DP_DSC_RECEIVER_CAP_SIZE) < 0) {
+		drm_err(aux->drm_dev,
+			"Failed to read DPCD register 0x%x\n",
+			DP_DSC_SUPPORT);
+		return;
+	}
+
+	drm_dbg_kms(aux->drm_dev, "DSC DPCD: %*ph\n",
+		    DP_DSC_RECEIVER_CAP_SIZE,
+		    dsc_dpcd);
+}
+
+void intel_dp_get_dsc_sink_cap(u8 dpcd_rev, struct intel_connector *connector)
+{
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 
 	/*
 	 * Clear the cached register set to avoid using stale values
 	 * for the sinks that do not support DSC.
 	 */
-	memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));
+	memset(connector->dp.dsc_dpcd, 0, sizeof(connector->dp.dsc_dpcd));
 
 	/* Clear fec_capable to avoid using stale values */
-	intel_dp->fec_capable = 0;
-
-	/* Cache the DSC DPCD if eDP or DP rev >= 1.4 */
-	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x14 ||
-	    intel_dp->edp_dpcd[0] >= DP_EDP_14) {
-		if (drm_dp_dpcd_read(&intel_dp->aux, DP_DSC_SUPPORT,
-				     intel_dp->dsc_dpcd,
-				     sizeof(intel_dp->dsc_dpcd)) < 0)
-			drm_err(&i915->drm,
-				"Failed to read DPCD register 0x%x\n",
-				DP_DSC_SUPPORT);
+	connector->dp.fec_capability = 0;
 
-		drm_dbg_kms(&i915->drm, "DSC DPCD: %*ph\n",
-			    (int)sizeof(intel_dp->dsc_dpcd),
-			    intel_dp->dsc_dpcd);
+	if (dpcd_rev < DP_DPCD_REV_14)
+		return;
 
-		/* FEC is supported only on DP 1.4 */
-		if (!intel_dp_is_edp(intel_dp) &&
-		    drm_dp_dpcd_readb(&intel_dp->aux, DP_FEC_CAPABILITY,
-				      &intel_dp->fec_capable) < 0)
-			drm_err(&i915->drm,
-				"Failed to read FEC DPCD register\n");
+	intel_dp_read_dsc_dpcd(connector->dp.dsc_decompression_aux,
+			       connector->dp.dsc_dpcd);
 
-		drm_dbg_kms(&i915->drm, "FEC CAPABILITY: %x\n",
-			    intel_dp->fec_capable);
+	if (drm_dp_dpcd_readb(connector->dp.dsc_decompression_aux, DP_FEC_CAPABILITY,
+			      &connector->dp.fec_capability) < 0) {
+		drm_err(&i915->drm, "Failed to read FEC DPCD register\n");
+		return;
 	}
+
+	drm_dbg_kms(&i915->drm, "FEC CAPABILITY: %x\n",
+		    connector->dp.fec_capability);
+}
+
+static void intel_edp_get_dsc_sink_cap(u8 edp_dpcd_rev, struct intel_connector *connector)
+{
+	if (edp_dpcd_rev < DP_EDP_14)
+		return;
+
+	intel_dp_read_dsc_dpcd(connector->dp.dsc_decompression_aux, connector->dp.dsc_dpcd);
 }
 
 static void intel_edp_mso_mode_fixup(struct intel_connector *connector,
@@ -3595,7 +3616,7 @@ static void intel_edp_mso_init(struct intel_dp *intel_dp)
 }
 
 static bool
-intel_edp_init_dpcd(struct intel_dp *intel_dp)
+intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector)
 {
 	struct drm_i915_private *dev_priv =
 		to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
@@ -3674,7 +3695,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
 
 	/* Read the eDP DSC DPCD registers */
 	if (HAS_DSC(dev_priv))
-		intel_dp_get_dsc_sink_cap(intel_dp);
+		intel_edp_get_dsc_sink_cap(intel_dp->edp_dpcd[0],
+					   connector);
 
 	/*
 	 * If needed, program our source OUI so we can make various Intel-specific AUX services
@@ -5338,13 +5360,32 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
 					       false);
 }
 
+static void
+intel_dp_detect_dsc_caps(struct intel_dp *intel_dp, struct intel_connector *connector)
+{
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	/* Read DP Sink DSC Cap DPCD regs for DP v1.4 */
+	if (!HAS_DSC(i915))
+		return;
+
+	if (intel_dp_is_edp(intel_dp))
+		intel_edp_get_dsc_sink_cap(intel_dp->edp_dpcd[0],
+					   connector);
+	else
+		intel_dp_get_dsc_sink_cap(intel_dp->dpcd[DP_DPCD_REV],
+					  connector);
+}
+
 static int
 intel_dp_detect(struct drm_connector *connector,
 		struct drm_modeset_acquire_ctx *ctx,
 		bool force)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->dev);
-	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
+	struct intel_connector *intel_connector =
+		to_intel_connector(connector);
+	struct intel_dp *intel_dp = intel_attached_dp(intel_connector);
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 	struct intel_encoder *encoder = &dig_port->base;
 	enum drm_connector_status status;
@@ -5367,7 +5408,7 @@ intel_dp_detect(struct drm_connector *connector,
 
 	if (status == connector_status_disconnected) {
 		memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
-		memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));
+		memset(intel_connector->dp.dsc_dpcd, 0, sizeof(intel_connector->dp.dsc_dpcd));
 
 		if (intel_dp->is_mst) {
 			drm_dbg_kms(&dev_priv->drm,
@@ -5382,9 +5423,7 @@ intel_dp_detect(struct drm_connector *connector,
 		goto out;
 	}
 
-	/* Read DP Sink DSC Cap DPCD regs for DP v1.4 */
-	if (HAS_DSC(dev_priv))
-		intel_dp_get_dsc_sink_cap(intel_dp);
+	intel_dp_detect_dsc_caps(intel_dp, intel_connector);
 
 	intel_dp_configure_mst(intel_dp);
 
@@ -5980,7 +6019,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	intel_hpd_enable_detection(encoder);
 
 	/* Cache DPCD and EDID for edp. */
-	has_dpcd = intel_edp_init_dpcd(intel_dp);
+	has_dpcd = intel_edp_init_dpcd(intel_dp, intel_connector);
 
 	if (!has_dpcd) {
 		/* if this fails, presume the device is a ghost */
@@ -6154,6 +6193,7 @@ intel_dp_init_connector(struct intel_digital_port *dig_port,
 		intel_dp->pps.active_pipe = vlv_active_pipe(intel_dp);
 
 	intel_dp_aux_init(intel_dp);
+	intel_connector->dp.dsc_decompression_aux = &intel_dp->aux;
 
 	drm_dbg_kms(&dev_priv->drm,
 		    "Adding %s connector on [ENCODER:%d:%s]\n",
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 2cf3681bac64..484aea215a25 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -116,7 +116,8 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
 		       struct intel_crtc_state *crtc_state,
 		       unsigned int type);
 bool intel_digital_port_connected(struct intel_encoder *encoder);
-int intel_dp_dsc_compute_max_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc);
+int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
+				 u8 dsc_max_bpc);
 u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
 					u32 link_clock, u32 lane_count,
 					u32 mode_clock, u32 mode_hdisplay,
@@ -124,7 +125,7 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
 					enum intel_output_format output_format,
 					u32 pipe_bpp,
 					u32 timeslots);
-u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
+u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
 				int mode_clock, int mode_hdisplay,
 				bool bigjoiner);
 bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
@@ -162,4 +163,6 @@ intel_dp_compute_config_link_bpp_limits(struct intel_dp *intel_dp,
 					bool dsc,
 					struct link_config_limits *limits);
 
+void intel_dp_get_dsc_sink_cap(u8 dpcd_rev, struct intel_connector *connector);
+
 #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 95cc5251843e..26ea7e9f1b89 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -169,7 +169,7 @@ intel_dp_aux_hdr_get_backlight(struct intel_connector *connector, enum pipe pipe
 	struct intel_panel *panel = &connector->panel;
 	struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder);
 	u8 tmp;
-	u8 buf[2] = { 0 };
+	u8 buf[2] = {};
 
 	if (drm_dp_dpcd_readb(&intel_dp->aux, INTEL_EDP_HDR_GETSET_CTRL_PARAMS, &tmp) != 1) {
 		drm_err(&i915->drm, "[CONNECTOR:%d:%s] Failed to read current backlight mode from DPCD\n",
@@ -204,7 +204,7 @@ intel_dp_aux_hdr_set_aux_backlight(const struct drm_connector_state *conn_state,
 	struct intel_connector *connector = to_intel_connector(conn_state->connector);
 	struct drm_device *dev = connector->base.dev;
 	struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder);
-	u8 buf[4] = { 0 };
+	u8 buf[4] = {};
 
 	buf[0] = level & 0xFF;
 	buf[1] = (level & 0xFF00) >> 8;
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 73e397736463..7b4628f4f124 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -185,8 +185,6 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder,
 						struct drm_connector_state *conn_state,
 						struct link_config_limits *limits)
 {
-	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
-	struct intel_dp *intel_dp = &intel_mst->primary->dp;
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
 	struct drm_i915_private *i915 = to_i915(connector->base.dev);
@@ -194,7 +192,7 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder,
 		&crtc_state->hw.adjusted_mode;
 	int slots = -EINVAL;
 	int i, num_bpc;
-	u8 dsc_bpc[3] = {0};
+	u8 dsc_bpc[3] = {};
 	int min_bpp, max_bpp, sink_min_bpp, sink_max_bpp;
 	u8 dsc_max_bpc;
 	bool need_timeslot_recalc = false;
@@ -209,7 +207,7 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder,
 	max_bpp = min_t(u8, dsc_max_bpc * 3, limits->pipe.max_bpp);
 	min_bpp = limits->pipe.min_bpp;
 
-	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd,
+	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
 						       dsc_bpc);
 
 	drm_dbg_kms(&i915->drm, "DSC Source supported min bpp %d max bpp %d\n",
@@ -998,14 +996,14 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 	}
 
 	if (DISPLAY_VER(dev_priv) >= 10 &&
-	    drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
+	    drm_dp_sink_supports_dsc(intel_connector->dp.dsc_dpcd)) {
 		/*
 		 * TBD pass the connector BPC,
 		 * for now U8_MAX so that max BPC on that platform would be picked
 		 */
-		int pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp, U8_MAX);
+		int pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_connector, U8_MAX);
 
-		if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
+		if (drm_dp_sink_supports_fec(intel_connector->dp.fec_capability)) {
 			dsc_max_compressed_bpp =
 				intel_dp_dsc_get_max_compressed_bpp(dev_priv,
 								    max_link_clock,
@@ -1016,7 +1014,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 								    INTEL_OUTPUT_FORMAT_RGB,
 								    pipe_bpp, 64);
 			dsc_slice_count =
-				intel_dp_dsc_get_slice_count(intel_dp,
+				intel_dp_dsc_get_slice_count(intel_connector,
 							     target_clock,
 							     mode->hdisplay,
 							     bigjoiner);
@@ -1126,6 +1124,21 @@ static int intel_dp_mst_add_properties(struct intel_dp *intel_dp,
 	return drm_connector_set_path_property(connector, pathprop);
 }
 
+static void
+intel_dp_mst_read_decompression_port_dsc_caps(struct intel_dp *intel_dp,
+					      struct intel_connector *connector)
+{
+	u8 dpcd_caps[DP_RECEIVER_CAP_SIZE];
+
+	if (!connector->dp.dsc_decompression_aux)
+		return;
+
+	if (drm_dp_read_dpcd_caps(connector->dp.dsc_decompression_aux, dpcd_caps) < 0)
+		return;
+
+	intel_dp_get_dsc_sink_cap(dpcd_caps[DP_DPCD_REV], connector);
+}
+
 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 							struct drm_dp_mst_port *port,
 							const char *pathprop)
@@ -1159,6 +1172,14 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 
 	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 
+	/*
+	 * TODO: set the AUX for the actual MST port decompressing the stream.
+	 * At the moment the driver only supports enabling this globally in the
+	 * first downstream MST branch, via intel_dp's (root port) AUX.
+	 */
+	intel_connector->dp.dsc_decompression_aux = &intel_dp->aux;
+	intel_dp_mst_read_decompression_port_dsc_caps(intel_dp, intel_connector);
+
 	for_each_pipe(dev_priv, pipe) {
 		struct drm_encoder *enc =
 			&intel_dp->mst_encoders[pipe]->base.base;
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c
index 3e32aa49b8eb..78b6fe24dcd8 100644
--- a/drivers/gpu/drm/i915/display/intel_dsb.c
+++ b/drivers/gpu/drm/i915/display/intel_dsb.c
@@ -5,6 +5,7 @@
  */
 
 #include "gem/i915_gem_internal.h"
+#include "gem/i915_gem_lmem.h"
 
 #include "i915_drv.h"
 #include "i915_irq.h"
@@ -315,6 +316,8 @@ void intel_dsb_finish(struct intel_dsb *dsb)
 				   DSB_FORCE_DEWAKE, 0);
 
 	intel_dsb_align_tail(dsb);
+
+	i915_gem_object_flush_map(dsb->vma->obj);
 }
 
 static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state)
@@ -461,9 +464,18 @@ struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state,
 	/* ~1 qword per instruction, full cachelines */
 	size = ALIGN(max_cmds * 8, CACHELINE_BYTES);
 
-	obj = i915_gem_object_create_internal(i915, PAGE_ALIGN(size));
-	if (IS_ERR(obj))
-		goto out_put_rpm;
+	if (HAS_LMEM(i915)) {
+		obj = i915_gem_object_create_lmem(i915, PAGE_ALIGN(size),
+						  I915_BO_ALLOC_CONTIGUOUS);
+		if (IS_ERR(obj))
+			goto out_put_rpm;
+	} else {
+		obj = i915_gem_object_create_internal(i915, PAGE_ALIGN(size));
+		if (IS_ERR(obj))
+			goto out_put_rpm;
+
+		i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
+	}
 
 	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
 	if (IS_ERR(vma)) {
diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
index 801fabbccf7e..40d7b6f3f489 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.c
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
@@ -781,7 +781,7 @@ int intel_gmbus_output_aksv(struct i2c_adapter *adapter)
 	struct intel_gmbus *bus = to_intel_gmbus(adapter);
 	struct drm_i915_private *i915 = bus->i915;
 	u8 cmd = DRM_HDCP_DDC_AKSV;
-	u8 buf[DRM_HDCP_KSV_LEN] = { 0 };
+	u8 buf[DRM_HDCP_KSV_LEN] = {};
 	struct i2c_msg msgs[] = {
 		{
 			.addr = DRM_HDCP_DDC_ADDR,
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c b/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c
index caa9f0b25729..240b00849f3d 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp_gsc_message.c
@@ -13,9 +13,8 @@ int
 intel_hdcp_gsc_initiate_session(struct device *dev, struct hdcp_port_data *data,
 				struct hdcp2_ake_init *ake_data)
 {
-	struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
-	struct wired_cmd_initiate_hdcp2_session_out
-						session_init_out = { { 0 } };
+	struct wired_cmd_initiate_hdcp2_session_in session_init_in = {};
+	struct wired_cmd_initiate_hdcp2_session_out session_init_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -71,8 +70,8 @@ intel_hdcp_gsc_verify_receiver_cert_prepare_km(struct device *dev,
 					       *ek_pub_km,
 					       size_t *msg_sz)
 {
-	struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = { { 0 } };
-	struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = { { 0 } };
+	struct wired_cmd_verify_receiver_cert_in verify_rxcert_in = {};
+	struct wired_cmd_verify_receiver_cert_out verify_rxcert_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -134,8 +133,8 @@ int
 intel_hdcp_gsc_verify_hprime(struct device *dev, struct hdcp_port_data *data,
 			     struct hdcp2_ake_send_hprime *rx_hprime)
 {
-	struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } };
-	struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } };
+	struct wired_cmd_ake_send_hprime_in send_hprime_in = {};
+	struct wired_cmd_ake_send_hprime_out send_hprime_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -182,8 +181,8 @@ int
 intel_hdcp_gsc_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
 				  struct hdcp2_ake_send_pairing_info *pairing_info)
 {
-	struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
-	struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
+	struct wired_cmd_ake_send_pairing_info_in pairing_info_in = {};
+	struct wired_cmd_ake_send_pairing_info_out pairing_info_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -233,8 +232,8 @@ intel_hdcp_gsc_initiate_locality_check(struct device *dev,
 				       struct hdcp_port_data *data,
 				       struct hdcp2_lc_init *lc_init_data)
 {
-	struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } };
-	struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } };
+	struct wired_cmd_init_locality_check_in lc_init_in = {};
+	struct wired_cmd_init_locality_check_out lc_init_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -279,8 +278,8 @@ int
 intel_hdcp_gsc_verify_lprime(struct device *dev, struct hdcp_port_data *data,
 			     struct hdcp2_lc_send_lprime *rx_lprime)
 {
-	struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } };
-	struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } };
+	struct wired_cmd_validate_locality_in verify_lprime_in = {};
+	struct wired_cmd_validate_locality_out verify_lprime_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -329,8 +328,8 @@ int intel_hdcp_gsc_get_session_key(struct device *dev,
 				   struct hdcp_port_data *data,
 				   struct hdcp2_ske_send_eks *ske_data)
 {
-	struct wired_cmd_get_session_key_in get_skey_in = { { 0 } };
-	struct wired_cmd_get_session_key_out get_skey_out = { { 0 } };
+	struct wired_cmd_get_session_key_in get_skey_in = {};
+	struct wired_cmd_get_session_key_out get_skey_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -381,8 +380,8 @@ intel_hdcp_gsc_repeater_check_flow_prepare_ack(struct device *dev,
 					       struct hdcp2_rep_send_ack
 					       *rep_send_ack)
 {
-	struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } };
-	struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } };
+	struct wired_cmd_verify_repeater_in verify_repeater_in = {};
+	struct wired_cmd_verify_repeater_out verify_repeater_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -442,8 +441,7 @@ int intel_hdcp_gsc_verify_mprime(struct device *dev,
 				 struct hdcp2_rep_stream_ready *stream_ready)
 {
 	struct wired_cmd_repeater_auth_stream_req_in *verify_mprime_in;
-	struct wired_cmd_repeater_auth_stream_req_out
-					verify_mprime_out = { { 0 } };
+	struct wired_cmd_repeater_auth_stream_req_out verify_mprime_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 	size_t cmd_size;
@@ -504,8 +502,8 @@ int intel_hdcp_gsc_verify_mprime(struct device *dev,
 int intel_hdcp_gsc_enable_authentication(struct device *dev,
 					 struct hdcp_port_data *data)
 {
-	struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } };
-	struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } };
+	struct wired_cmd_enable_auth_in enable_auth_in = {};
+	struct wired_cmd_enable_auth_out enable_auth_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
@@ -549,8 +547,8 @@ int intel_hdcp_gsc_enable_authentication(struct device *dev,
 int
 intel_hdcp_gsc_close_session(struct device *dev, struct hdcp_port_data *data)
 {
-	struct wired_cmd_close_session_in session_close_in = { { 0 } };
-	struct wired_cmd_close_session_out session_close_out = { { 0 } };
+	struct wired_cmd_close_session_in session_close_in = {};
+	struct wired_cmd_close_session_out session_close_out = {};
 	struct drm_i915_private *i915;
 	ssize_t byte;
 
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
index 451a642e106e..a55c09cbd0e4 100644
--- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -166,7 +166,7 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+	struct drm_mode_fb_cmd2 mode_cmd = {};
 	struct drm_framebuffer *fb = &plane_config->fb->base;
 	struct i915_vma *vma;
 
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index bb65881e87cc..4f1f31fc9529 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -676,7 +676,9 @@ static void hsw_activate_psr1(struct intel_dp *intel_dp)
 
 	val |= EDP_PSR_IDLE_FRAMES(psr_compute_idle_frames(intel_dp));
 
-	val |= EDP_PSR_MAX_SLEEP_TIME(max_sleep_time);
+	if (DISPLAY_VER(dev_priv) < 20)
+		val |= EDP_PSR_MAX_SLEEP_TIME(max_sleep_time);
+
 	if (IS_HASWELL(dev_priv))
 		val |= EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES;
 
@@ -1400,8 +1402,10 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 	 */
 	mask = EDP_PSR_DEBUG_MASK_MEMUP |
 	       EDP_PSR_DEBUG_MASK_HPD |
-	       EDP_PSR_DEBUG_MASK_LPSP |
-	       EDP_PSR_DEBUG_MASK_MAX_SLEEP;
+	       EDP_PSR_DEBUG_MASK_LPSP;
+
+	if (DISPLAY_VER(dev_priv) < 20)
+		mask |= EDP_PSR_DEBUG_MASK_MAX_SLEEP;
 
 	/*
 	 * No separate pipe reg write mask on hsw/bdw, so have to unmask all
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index 35137e978591..a636f42ceae5 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -649,7 +649,7 @@ intel_sdvo_get_value(struct intel_sdvo *intel_sdvo, u8 cmd, void *value, int len
 
 static bool intel_sdvo_set_target_input(struct intel_sdvo *intel_sdvo)
 {
-	struct intel_sdvo_set_target_input_args targets = {0};
+	struct intel_sdvo_set_target_input_args targets = {};
 	return intel_sdvo_set_value(intel_sdvo,
 				    SDVO_CMD_SET_TARGET_INPUT,
 				    &targets, sizeof(targets));
diff --git a/drivers/gpu/drm/i915/display/intel_snps_phy.c b/drivers/gpu/drm/i915/display/intel_snps_phy.c
index c0285365efae..ce5a73a4cc89 100644
--- a/drivers/gpu/drm/i915/display/intel_snps_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_snps_phy.c
@@ -1998,7 +1998,7 @@ void intel_mpllb_state_verify(struct intel_atomic_state *state,
 	struct drm_i915_private *i915 = to_i915(state->base.dev);
 	const struct intel_crtc_state *new_crtc_state =
 		intel_atomic_get_new_crtc_state(state, crtc);
-	struct intel_mpllb_state mpllb_hw_state = { 0 };
+	struct intel_mpllb_state mpllb_hw_state = {};
 	const struct intel_mpllb_state *mpllb_sw_state = &new_crtc_state->mpllb_state;
 	struct intel_encoder *encoder;
 
diff --git a/drivers/gpu/drm/i915/display/intel_wm.c b/drivers/gpu/drm/i915/display/intel_wm.c
index b615449e70b4..82c4933ad507 100644
--- a/drivers/gpu/drm/i915/display/intel_wm.c
+++ b/drivers/gpu/drm/i915/display/intel_wm.c
@@ -290,7 +290,7 @@ static ssize_t wm_latency_write(struct file *file, const char __user *ubuf,
 {
 	struct seq_file *m = file->private_data;
 	struct drm_i915_private *dev_priv = m->private;
-	u16 new[8] = { 0 };
+	u16 new[8] = {};
 	int level;
 	int ret;
 	char tmp[32];
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index df7c261410f7..bb577345bc0e 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -836,7 +836,6 @@ static const struct intel_device_info mtl_info = {
 	.has_pxp = 1,
 	.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,
 	.platform_engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(CCS0),
-	.require_force_probe = 1,
 	MTL_CACHELEVEL,
 };
 
@@ -923,7 +922,7 @@ static const struct pci_device_id pciidlist[] = {
 	INTEL_DG2_IDS(&dg2_info),
 	INTEL_ATS_M_IDS(&ats_m_info),
 	INTEL_MTL_IDS(&mtl_info),
-	{0, 0, 0}
+	{}
 };
 MODULE_DEVICE_TABLE(pci, pciidlist);