[Intel-xe] [PATCH 1/1] fixup! drm/xe/display: Implement display support

[Lucas De Marchi <lucas.demarchi@intel.com>]

Synchronize ext/intel_dram.c with the i915 source.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/xe/display/ext/intel_dram.c | 40 ++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/display/ext/intel_dram.c b/drivers/gpu/drm/xe/display/ext/intel_dram.c
index 3e8c413280a5..77b874ef4f22 100644
--- a/drivers/gpu/drm/xe/display/ext/intel_dram.c
+++ b/drivers/gpu/drm/xe/display/ext/intel_dram.c
@@ -464,6 +464,42 @@ 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_de_read(i915, MTL_MEM_SS_INFO_GLOBAL);
+	struct dram_info *dram_info = &i915->dram_info;
+
+	switch (REG_FIELD_GET(MTL_DDR_TYPE_MASK, 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;
@@ -478,7 +514,9 @@ 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);
-- 
2.40.1