[PATCH 4/4] drm/i915: Rename is_16gb_dimm to wm_lv_0_adjust_needed

[José Roberto de Souza]

As it now it is always required for GEN12+ the is_16gb_dimm name
do not make sense for GEN12+.

v2:
- Updated comment on top of "dram_info->wm_lv_0_adjust_needed =
!IS_GEN9_LP(i915);"

Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h   |  2 +-
 drivers/gpu/drm/i915/intel_dram.c | 15 +++++++--------
 drivers/gpu/drm/i915/intel_pm.c   |  2 +-
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 80227d47b5cb..f684147290cb 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1128,7 +1128,7 @@ struct drm_i915_private {
 	} wm;
 
 	struct dram_info {
-		bool is_16gb_dimm;
+		bool wm_lv_0_adjust_needed;
 		u8 num_channels;
 		bool symmetric_memory;
 		enum intel_dram_type {
diff --git a/drivers/gpu/drm/i915/intel_dram.c b/drivers/gpu/drm/i915/intel_dram.c
index 6ce56eedaf12..6a13cf39da99 100644
--- a/drivers/gpu/drm/i915/intel_dram.c
+++ b/drivers/gpu/drm/i915/intel_dram.c
@@ -207,7 +207,7 @@ skl_dram_get_channels_info(struct drm_i915_private *i915)
 		return -EINVAL;
 	}
 
-	dram_info->is_16gb_dimm = ch0.is_16gb_dimm || ch1.is_16gb_dimm;
+	dram_info->wm_lv_0_adjust_needed = ch0.is_16gb_dimm || ch1.is_16gb_dimm;
 
 	dram_info->symmetric_memory = intel_is_dram_symmetric(&ch0, &ch1);
 
@@ -479,7 +479,7 @@ static int gen11_get_dram_info(struct drm_i915_private *i915)
 static int gen12_get_dram_info(struct drm_i915_private *i915)
 {
 	/* Always needed for GEN12+ */
-	i915->dram_info.is_16gb_dimm = true;
+	i915->dram_info.wm_lv_0_adjust_needed = true;
 
 	return icl_pcode_read_mem_global_info(i915);
 }
@@ -490,11 +490,10 @@ int intel_dram_detect(struct drm_i915_private *i915)
 	int ret;
 
 	/*
-	 * Assume 16Gb DIMMs are present until proven otherwise.
-	 * This is only used for the level 0 watermark latency
-	 * w/a which does not apply to bxt/glk.
+	 * Assume level 0 watermark latency adjustment is needed until proven
+	 * otherwise, this w/a is not needed by bxt/glk.
 	 */
-	dram_info->is_16gb_dimm = !IS_GEN9_LP(i915);
+	dram_info->wm_lv_0_adjust_needed = !IS_GEN9_LP(i915);
 
 	if (INTEL_GEN(i915) < 9 || !HAS_DISPLAY(i915))
 		return 0;
@@ -515,8 +514,8 @@ int intel_dram_detect(struct drm_i915_private *i915)
 
 	drm_dbg_kms(&i915->drm, "DRAM channels: %u\n", dram_info->num_channels);
 
-	drm_dbg_kms(&i915->drm, "DRAM 16Gb DIMMs: %s\n",
-		    yesno(dram_info->is_16gb_dimm));
+	drm_dbg_kms(&i915->drm, "Watermark level 0 adjustment needed: %s\n",
+		    yesno(dram_info->wm_lv_0_adjust_needed));
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 6e9678bd0597..c58e5077590d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2930,7 +2930,7 @@ static void intel_read_wm_latency(struct drm_i915_private *dev_priv,
 		 * any underrun. If not able to get Dimm info assume 16GB dimm
 		 * to avoid any underrun.
 		 */
-		if (dev_priv->dram_info.is_16gb_dimm)
+		if (dev_priv->dram_info.wm_lv_0_adjust_needed)
 			wm[0] += 1;
 
 	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-- 
2.30.0