diff mbox series

[v4,08/11] drm/i915/mtl: Obtain SAGV values from MMIO instead of GT pcode mailbox

Message ID 20220902060342.151824-9-radhakrishna.sripada@intel.com (mailing list archive)
State New, archived
Headers show
Series Initial Meteorlake Support | expand

Commit Message

Sripada, Radhakrishna Sept. 2, 2022, 6:03 a.m. UTC 
From Meteorlake, Latency Level, SAGV bloack time are read from
LATENCY_SAGV register instead of the GT driver pcode mailbox. DDR type
and QGV information are also to be read from Mem SS registers.

v2:
 - Simplify MTL_MEM_SS_INFO_QGV_POINT macro(MattR)
 - Nit: Rearrange the bit def's from higher to lower(MattR)
 - Restore platform definition for ADL-P(MattR)
 - Move back intel_qgv_point def to intel_bw.c(Jani)

Bspec: 64636, 64608

Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Original Author: Caz Yokoyama
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 42 ++++++++++++++++++++++---
 drivers/gpu/drm/i915/i915_reg.h         | 17 ++++++++++
 drivers/gpu/drm/i915/intel_dram.c       | 41 +++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_pm.c         |  8 ++++-
 4 files changed, 101 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 61308ebe48aa..b13c4e240619 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -137,6 +137,42 @@  int icl_pcode_restrict_qgv_points(struct drm_i915_private *dev_priv,
 	return 0;
 }
 
+static int mtl_read_qgv_point_info(struct drm_i915_private *dev_priv,
+				   struct intel_qgv_point *sp, int point)
+{
+	u32 val, val2;
+	u16 dclk;
+
+	val = intel_uncore_read(&dev_priv->uncore,
+				MTL_MEM_SS_INFO_QGV_POINT_LOW(point));
+	val2 = intel_uncore_read(&dev_priv->uncore,
+				 MTL_MEM_SS_INFO_QGV_POINT_HIGH(point));
+	dclk = REG_FIELD_GET(MTL_DCLK_MASK, val);
+	sp->dclk = DIV_ROUND_UP((16667 * dclk), 1000);
+	sp->t_rp = REG_FIELD_GET(MTL_TRP_MASK, val);
+	sp->t_rcd = REG_FIELD_GET(MTL_TRCD_MASK, val);
+
+	sp->t_rdpre = REG_FIELD_GET(MTL_TRDPRE_MASK, val2);
+	sp->t_ras = REG_FIELD_GET(MTL_TRAS_MASK, val2);
+
+	sp->t_rc = sp->t_rp + sp->t_ras;
+
+	return 0;
+}
+
+static int
+intel_read_qgv_point_info(struct drm_i915_private *dev_priv,
+			  struct intel_qgv_point *sp,
+			  int point)
+{
+	if (DISPLAY_VER(dev_priv) >= 14)
+		return mtl_read_qgv_point_info(dev_priv, sp, point);
+	else if (IS_DG1(dev_priv))
+		return dg1_mchbar_read_qgv_point_info(dev_priv, sp, point);
+	else
+		return icl_pcode_read_qgv_point_info(dev_priv, sp, point);
+}
+
 static int icl_get_qgv_points(struct drm_i915_private *dev_priv,
 			      struct intel_qgv_info *qi,
 			      bool is_y_tile)
@@ -218,11 +254,7 @@  static int icl_get_qgv_points(struct drm_i915_private *dev_priv,
 	for (i = 0; i < qi->num_points; i++) {
 		struct intel_qgv_point *sp = &qi->points[i];
 
-		if (IS_DG1(dev_priv))
-			ret = dg1_mchbar_read_qgv_point_info(dev_priv, sp, i);
-		else
-			ret = icl_pcode_read_qgv_point_info(dev_priv, sp, i);
-
+		ret = intel_read_qgv_point_info(dev_priv, sp, i);
 		if (ret)
 			return ret;
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4ec6a3dd1f2b..d22fabe35a0c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8335,4 +8335,21 @@  enum skl_power_gate {
 
 #define MTL_MEDIA_GSI_BASE		0x380000
 
+#define MTL_LATENCY_SAGV		_MMIO(0x4578c)
+#define   MTL_LATENCY_QCLK_SAGV		REG_GENMASK(12, 0)
+
+#define MTL_MEM_SS_INFO_GLOBAL			_MMIO(0x45700)
+#define   MTL_N_OF_ENABLED_QGV_POINTS_MASK	REG_GENMASK(11, 8)
+#define   MTL_N_OF_POPULATED_CH_MASK		REG_GENMASK(7, 4)
+#define   MTL_DDR_TYPE_MASK			REG_GENMASK(3, 0)
+
+#define MTL_MEM_SS_INFO_QGV_POINT_LOW(point)	 _MMIO(0x45710 + (point) * 2)
+#define   MTL_TRCD_MASK			REG_GENMASK(31, 24)
+#define   MTL_TRP_MASK			REG_GENMASK(23, 16)
+#define   MTL_DCLK_MASK			REG_GENMASK(15, 0)
+
+#define MTL_MEM_SS_INFO_QGV_POINT_HIGH(point)	 _MMIO(0x45714 + (point) * 2)
+#define   MTL_TRAS_MASK			REG_GENMASK(16, 8)
+#define   MTL_TRDPRE_MASK		REG_GENMASK(7, 0)
+
 #endif /* _I915_REG_H_ */
diff --git a/drivers/gpu/drm/i915/intel_dram.c b/drivers/gpu/drm/i915/intel_dram.c
index 437447119770..2403ccd52c74 100644
--- a/drivers/gpu/drm/i915/intel_dram.c
+++ b/drivers/gpu/drm/i915/intel_dram.c
@@ -466,6 +466,43 @@  static int gen12_get_dram_info(struct drm_i915_private *i915)
 	return icl_pcode_read_mem_global_info(i915);
 }
 
+static int xelpdp_get_dram_info(struct drm_i915_private *i915)
+{
+	u32 val = intel_uncore_read(&i915->uncore, MTL_MEM_SS_INFO_GLOBAL);
+	struct dram_info *dram_info = &i915->dram_info;
+
+	val = REG_FIELD_GET(MTL_DDR_TYPE_MASK, val);
+	switch (val) {
+	case 0:
+		dram_info->type = INTEL_DRAM_DDR4;
+		break;
+	case 1:
+		dram_info->type = INTEL_DRAM_DDR5;
+		break;
+	case 2:
+		dram_info->type = INTEL_DRAM_LPDDR5;
+		break;
+	case 3:
+		dram_info->type = INTEL_DRAM_LPDDR4;
+		break;
+	case 4:
+		dram_info->type = INTEL_DRAM_DDR3;
+		break;
+	case 5:
+		dram_info->type = INTEL_DRAM_LPDDR3;
+		break;
+	default:
+		MISSING_CASE(val);
+		return -EINVAL;
+	}
+
+	dram_info->num_channels = REG_FIELD_GET(MTL_N_OF_POPULATED_CH_MASK, val);
+	dram_info->num_qgv_points = REG_FIELD_GET(MTL_N_OF_ENABLED_QGV_POINTS_MASK, val);
+	/* PSF GV points not supported in D14+ */
+
+	return 0;
+}
+
 void intel_dram_detect(struct drm_i915_private *i915)
 {
 	struct dram_info *dram_info = &i915->dram_info;
@@ -480,7 +517,9 @@  void intel_dram_detect(struct drm_i915_private *i915)
 	 */
 	dram_info->wm_lv_0_adjust_needed = !IS_GEN9_LP(i915);
 
-	if (GRAPHICS_VER(i915) >= 12)
+	if (DISPLAY_VER(i915) >= 14)
+		ret = xelpdp_get_dram_info(i915);
+	else if (GRAPHICS_VER(i915) >= 12)
 		ret = gen12_get_dram_info(i915);
 	else if (GRAPHICS_VER(i915) >= 11)
 		ret = gen11_get_dram_info(i915);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 210c1f78cc90..ebce6171ccef 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3697,7 +3697,13 @@  intel_has_sagv(struct drm_i915_private *dev_priv)
 static u32
 intel_sagv_block_time(struct drm_i915_private *dev_priv)
 {
-	if (DISPLAY_VER(dev_priv) >= 12) {
+	if (DISPLAY_VER(dev_priv) >= 14) {
+		u32 val;
+
+		val = intel_uncore_read(&dev_priv->uncore, MTL_LATENCY_SAGV);
+
+		return REG_FIELD_GET(MTL_LATENCY_QCLK_SAGV, val);
+	} else if (DISPLAY_VER(dev_priv) >= 12) {
 		u32 val = 0;
 		int ret;