[PATCH v8 1/4] drm/i915: Add meaningful traces for QGV point info error handling

[Vinod Govindapillai <vinod.govindapillai@intel.com>]

From: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>

For debug purposes we need those - error path won't flood the log,
however there has been already numerous cases, when due to lack
of debugs, we couldn't immediately tell what was the problem on
customer machine, which slowed down the investigation, requiring
to get access to target device and adding those traces manually.

v2: - Make the debug more generic and move it to intel_dram_detect
      (Gustavo Sousa)
v3: - Use %u for unsigned variable in debug prints (Gustavo)

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 4 +++-
 drivers/gpu/drm/i915/soc/intel_dram.c   | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 7f2a50b4f494..77886cc21211 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -290,8 +290,10 @@ static int icl_get_qgv_points(struct drm_i915_private *dev_priv,
 		struct intel_qgv_point *sp = &qi->points[i];
 
 		ret = intel_read_qgv_point_info(dev_priv, sp, i);
-		if (ret)
+		if (ret) {
+			drm_dbg_kms(&dev_priv->drm, "Could not read QGV %d info\n", i);
 			return ret;
+		}
 
 		drm_dbg_kms(&dev_priv->drm,
 			    "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n",
diff --git a/drivers/gpu/drm/i915/soc/intel_dram.c b/drivers/gpu/drm/i915/soc/intel_dram.c
index 15492b69f698..e3287f1de774 100644
--- a/drivers/gpu/drm/i915/soc/intel_dram.c
+++ b/drivers/gpu/drm/i915/soc/intel_dram.c
@@ -681,6 +681,8 @@ void intel_dram_detect(struct drm_i915_private *i915)
 	if (ret)
 		return;
 
+	drm_dbg_kms(&i915->drm, "Num qgv points %u\n", dram_info->num_qgv_points);
+
 	drm_dbg_kms(&i915->drm, "DRAM channels: %u\n", dram_info->num_channels);
 
 	drm_dbg_kms(&i915->drm, "Watermark level 0 adjustment needed: %s\n",
-- 
2.34.1