drm/i915/mtl: Extend PSR support

Meteorlake and display 14 platform don't have any PSR differences
when comparing to Alderlake-P display, so it was only necessary to
extend some checks to properly program hardware.

BSpec: 55229, 49196

Cc: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907081543.92268-1-mika.kahola@intel.com

drivers/gpu/drm/i915/display/intel_psr.c

@@ -533,7 +533,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 
 	val |= psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
 
-	if (!IS_ALDERLAKE_P(dev_priv))
+	if (DISPLAY_VER(dev_priv) <= 13 && !IS_ALDERLAKE_P(dev_priv))
 		val |= EDP_SU_TRACK_ENABLE;
 
 	if (DISPLAY_VER(dev_priv) >= 10 && DISPLAY_VER(dev_priv) <= 12)
@@ -616,7 +616,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
 static bool
 transcoder_has_psr2(struct drm_i915_private *dev_priv, enum transcoder trans)
 {
-	if (IS_ALDERLAKE_P(dev_priv))
+	if (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14)
 		return trans == TRANSCODER_A || trans == TRANSCODER_B;
 	else if (DISPLAY_VER(dev_priv) >= 12)
 		return trans == TRANSCODER_A;
@@ -696,7 +696,7 @@ dc3co_is_pipe_port_compatible(struct intel_dp *intel_dp,
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	enum port port = dig_port->base.port;
 
-	if (IS_ALDERLAKE_P(dev_priv))
+	if (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14)
 		return pipe <= PIPE_B && port <= PORT_B;
 	else
 		return pipe == PIPE_A && port == PORT_A;
@@ -795,11 +795,11 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
 		return intel_dp->psr.su_y_granularity == 4;
 
 	/*
-	 * adl_p has 1 line granularity. For other platforms with SW tracking we
-	 * can adjust the y coordinates to match sink requirement if multiple of
-	 * 4.
+	 * adl_p and display 14+ platforms has 1 line granularity.
+	 * For other platforms with SW tracking we can adjust the y coordinates
+	 * to match sink requirement if multiple of 4.
 	 */
-	if (IS_ALDERLAKE_P(dev_priv))
+	if (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14)
 		y_granularity = intel_dp->psr.su_y_granularity;
 	else if (intel_dp->psr.su_y_granularity <= 2)
 		y_granularity = 4;
@@ -883,7 +883,8 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 	 * resolution requires DSC to be enabled, priority is given to DSC
 	 * over PSR2.
 	 */
-	if (crtc_state->dsc.compression_enable) {
+	if (crtc_state->dsc.compression_enable &&
+	    (DISPLAY_VER(dev_priv) <= 13 && !IS_ALDERLAKE_P(dev_priv))) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "PSR2 cannot be enabled since DSC is enabled\n");
 		return false;
@@ -1474,7 +1475,7 @@ static u32 man_trk_ctl_enable_bit_get(struct drm_i915_private *dev_priv)
 
 static u32 man_trk_ctl_single_full_frame_bit_get(struct drm_i915_private *dev_priv)
 {
-	return IS_ALDERLAKE_P(dev_priv) ?
+	return IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14 ?
 	       ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME :
 	       PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
 }
@@ -1627,7 +1628,7 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
 	if (clip->y1 == -1)
 		goto exit;
 
-	if (IS_ALDERLAKE_P(dev_priv)) {
+	if (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14) {
 		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1);
 		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 - 1);
 	} else {
@@ -1664,7 +1665,15 @@ static void intel_psr2_sel_fetch_pipe_alignment(const struct intel_crtc_state *c
 						struct drm_rect *pipe_clip)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
-	const u16 y_alignment = crtc_state->su_y_granularity;
+	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
+	u16 y_alignment;
+
+	/* ADLP aligns the SU region to vdsc slice height in case dsc is enabled */
+	if (crtc_state->dsc.compression_enable &&
+	    (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14))
+		y_alignment = vdsc_cfg->slice_height;
+	else
+		y_alignment = crtc_state->su_y_granularity;
 
 	pipe_clip->y1 -= pipe_clip->y1 % y_alignment;
 	if (pipe_clip->y2 % y_alignment)

drivers/gpu/drm/i915/i915_reg.h

@@ -8346,6 +8346,11 @@ enum skl_power_gate {
 #define GEN12_CULLBIT2			_MMIO(0x7030)
 #define GEN12_STATE_ACK_DEBUG		_MMIO(0x20BC)
 
+#define _MTL_CLKGATE_DIS_TRANS_A			0x604E8
+#define _MTL_CLKGATE_DIS_TRANS_B			0x614E8
+#define MTL_CLKGATE_DIS_TRANS(trans)			_MMIO_TRANS2(trans, _MTL_CLKGATE_DIS_TRANS_A)
+#define  MTL_CLKGATE_DIS_TRANS_DMASC_GATING_DIS		REG_BIT(7)
+
 #define MTL_LATENCY_LP0_LP1		_MMIO(0x45780)
 #define MTL_LATENCY_LP2_LP3		_MMIO(0x45784)
 #define MTL_LATENCY_LP4_LP5		_MMIO(0x45788)