[Intel-gfx] [PATCH 56/56] drm/i915/display/adl_p: Implement PSR changes

From: Matt Roper <matthew.d.roper@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH 56/56] drm/i915/display/adl_p: Implement PSR changes
Date: Thu, 11 Mar 2021 14:36:32 -0800	[thread overview]
Message-ID: <20210311223632.3191939-57-matthew.d.roper@intel.com> (raw)
In-Reply-To: <20210311223632.3191939-1-matthew.d.roper@intel.com>

From: José Roberto de Souza <jose.souza@intel.com>

Implements changes around PSR for alderlake-P:

- EDP_SU_TRACK_ENABLE was removed and bit 30 now has other function
- Some bits of PSR2_MAN_TRK_CTL moved and SF_PARTIAL_FRAME_UPDATE was
  removed setting SU_REGION_START/END_ADDR will do this job
- SU_REGION_START/END_ADDR have now line granularity but will need to
  be aligned with DSC when the PSRS + DSC support lands

BSpec: 50422
BSpec: 50424
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 51 +++++++++++++++++++-----
 drivers/gpu/drm/i915/i915_reg.h          | 26 +++++++-----
 2 files changed, 56 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index e71d2dd6a4a5..752de6f8df61 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -519,11 +519,13 @@ static u32 intel_psr2_get_tp_time(struct intel_dp *intel_dp)
 static void hsw_activate_psr2(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	u32 val;
+	u32 val = EDP_PSR2_ENABLE;
 
 	val = psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
 
-	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
+	if (!IS_ALDERLAKE_P(dev_priv))
+		val |= EDP_SU_TRACK_ENABLE;
+
 	if (DISPLAY_VER(dev_priv) >= 10)
 		val |= EDP_Y_COORDINATE_ENABLE;
 
@@ -1245,21 +1247,32 @@ void intel_psr2_program_trans_man_trk_ctl(const struct intel_crtc_state *crtc_st
 static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
 				  struct drm_rect *clip, bool full_update)
 {
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	u32 val = PSR2_MAN_TRK_CTL_ENABLE;
 
 	if (full_update) {
-		val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
+		if (IS_ALDERLAKE_P(dev_priv))
+			val |= ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
+		else
+			val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
+
 		goto exit;
 	}
 
 	if (clip->y1 == -1)
 		goto exit;
 
-	drm_WARN_ON(crtc_state->uapi.crtc->dev, clip->y1 % 4 || clip->y2 % 4);
+	if (IS_ALDERLAKE_P(dev_priv)) {
+		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1);
+		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2);
+	} else {
+		drm_WARN_ON(crtc_state->uapi.crtc->dev, clip->y1 % 4 || clip->y2 % 4);
 
-	val |= PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE;
-	val |= PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1 / 4 + 1);
-	val |= PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 / 4 + 1);
+		val |= PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE;
+		val |= PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1 / 4 + 1);
+		val |= PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 / 4 + 1);
+	}
 exit:
 	crtc_state->psr2_man_track_ctl = val;
 }
@@ -1280,6 +1293,25 @@ static void clip_area_update(struct drm_rect *overlap_damage_area,
 		overlap_damage_area->y2 = damage_area->y2;
 }
 
+static void intel_psr2_sel_fetch_pipe_alignment(const struct intel_crtc_state *crtc_state,
+						struct drm_rect *pipe_clip)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	if (IS_ALDERLAKE_P(dev_priv)) {
+		/*
+		 * TODO: ADL-P have line granularity but when DSC is enabled it
+		 * needs to be aligned with DSC boundaries.
+		 */
+	} else {
+		/* It must be aligned to 4 lines/1 block */
+		pipe_clip->y1 -= pipe_clip->y1 % 4;
+		if (pipe_clip->y2 % 4)
+			pipe_clip->y2 = ((pipe_clip->y2 / 4) + 1) * 4;
+	}
+}
+
 int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 				struct intel_crtc *crtc)
 {
@@ -1388,10 +1420,7 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 	if (full_update)
 		goto skip_sel_fetch_set_loop;
 
-	/* It must be aligned to 4 lines */
-	pipe_clip.y1 -= pipe_clip.y1 % 4;
-	if (pipe_clip.y2 % 4)
-		pipe_clip.y2 = ((pipe_clip.y2 / 4) + 1) * 4;
+	intel_psr2_sel_fetch_pipe_alignment(crtc_state, &pipe_clip);
 
 	/*
 	 * Now that we have the pipe damaged area check if it intersect with
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d48a9dec8476..37caab2a4215 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4563,7 +4563,7 @@ enum {
 #define _PSR2_CTL_EDP				0x6f900
 #define EDP_PSR2_CTL(tran)			_MMIO_TRANS2(tran, _PSR2_CTL_A)
 #define   EDP_PSR2_ENABLE			(1 << 31)
-#define   EDP_SU_TRACK_ENABLE			(1 << 30)
+#define   EDP_SU_TRACK_ENABLE			(1 << 30) /* up to adl-p */
 #define   TGL_EDP_PSR2_BLOCK_COUNT_NUM_2	(0 << 28)
 #define   TGL_EDP_PSR2_BLOCK_COUNT_NUM_3	(1 << 28)
 #define   EDP_Y_COORDINATE_VALID		(1 << 26) /* GLK and CNL+ */
@@ -4630,17 +4630,23 @@ enum {
 #define PSR2_SU_STATUS_MASK(frame)	(0x3ff << PSR2_SU_STATUS_SHIFT(frame))
 #define PSR2_SU_STATUS_FRAMES		8
 
-#define _PSR2_MAN_TRK_CTL_A				0x60910
-#define _PSR2_MAN_TRK_CTL_EDP				0x6f910
-#define PSR2_MAN_TRK_CTL(tran)				_MMIO_TRANS2(tran, _PSR2_MAN_TRK_CTL_A)
-#define  PSR2_MAN_TRK_CTL_ENABLE			REG_BIT(31)
-#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK	REG_GENMASK(30, 21)
-#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)	REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
+#define _PSR2_MAN_TRK_CTL_A					0x60910
+#define _PSR2_MAN_TRK_CTL_EDP					0x6f910
+#define PSR2_MAN_TRK_CTL(tran)					_MMIO_TRANS2(tran, _PSR2_MAN_TRK_CTL_A)
+#define  PSR2_MAN_TRK_CTL_ENABLE				REG_BIT(31)
+#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK		REG_GENMASK(30, 21)
+#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)		REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
 #define  PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK		REG_GENMASK(20, 11)
 #define  PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(val)		REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK, val)
-#define  PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME		REG_BIT(3)
-#define  PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME	REG_BIT(2)
-#define  PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE	REG_BIT(1)
+#define  PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME			REG_BIT(3)
+#define  PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME		REG_BIT(2)
+#define  PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE		REG_BIT(1)
+#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK	REG_GENMASK(28, 16)
+#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)	REG_FIELD_PREP(ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
+#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK		REG_GENMASK(12, 0)
+#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(val)		REG_FIELD_PREP(ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK, val)
+#define  ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME		REG_BIT(14)
+#define  ADLP_PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME		REG_BIT(13)
 
 /* Icelake DSC Rate Control Range Parameter Registers */
 #define DSCA_RC_RANGE_PARAMETERS_0		_MMIO(0x6B240)
-- 
2.25.4

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