[Intel-gfx] [PATCH 4/5] drm/i915/guc: Extract param logic form guc_init

[Arkadiusz Hiler]

Let intel_guc_init() focus on determining and fetching the correct
firmware.

This patch introduces intel_sanitize_uc_params() that is called from
intel_uc_init().

Then, if we have GuC, we can call intel_guc_init() conditionally and we
do not have to do internal checks.

It can be easily extended to support HuC case as well.

Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Cc: Jeff McGee <jeff.mcgee at intel.com>
Cc: Michal Winiarski <michal.winiarski at intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
---
 drivers/gpu/drm/i915/intel_guc_loader.c | 19 +------------------
 drivers/gpu/drm/i915/intel_uc.c         | 23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index b76b556..0bb5fd1 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -617,7 +617,7 @@ static void guc_fw_fetch(struct drm_i915_private *dev_priv,
 }
 
 /**
- * intel_guc_init() - define parameters and fetch firmware
+ * intel_guc_init() - determine and fetch firmware
  * @dev_priv:	i915 device private
  *
  * Called early during driver load, but after GEM is initialised.
@@ -630,17 +630,6 @@ void intel_guc_init(struct drm_i915_private *dev_priv)
 	struct intel_guc_fw *guc_fw = &dev_priv->guc.guc_fw;
 	const char *fw_path;
 
-	if (!HAS_GUC(dev_priv)) {
-		i915.enable_guc_loading = 0;
-		i915.enable_guc_submission = 0;
-	} else {
-		/* A negative value means "use platform default" */
-		if (i915.enable_guc_loading < 0)
-			i915.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
-		if (i915.enable_guc_submission < 0)
-			i915.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
-	}
-
 	if (!HAS_GUC_UCODE(dev_priv)) {
 		fw_path = NULL;
 	} else if (IS_SKYLAKE(dev_priv)) {
@@ -663,13 +652,7 @@ void intel_guc_init(struct drm_i915_private *dev_priv)
 	guc_fw->guc_fw_fetch_status = GUC_FIRMWARE_NONE;
 	guc_fw->guc_fw_load_status = GUC_FIRMWARE_NONE;
 
-	/* can't enable guc submission without guc */
-	if (!i915.enable_guc_loading)
-		i915.enable_guc_submission = 0;
-
 	/* Early (and silent) return if GuC loading is disabled */
-	if (!i915.enable_guc_loading)
-		return;
 	if (fw_path == NULL)
 		return;
 	if (*fw_path == '\0')
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 4e184edb..e72f784 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -25,6 +25,24 @@
 #include "i915_drv.h"
 #include "intel_uc.h"
 
+static void intel_sanitize_uc_params(struct drm_i915_private *dev_priv)
+{
+	if (!HAS_GUC(dev_priv)) {
+		i915.enable_guc_loading = 0;
+		i915.enable_guc_submission = 0;
+	} else {
+		/* A negative value means "use platform default" */
+		if (i915.enable_guc_loading < 0)
+			i915.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
+		if (i915.enable_guc_submission < 0)
+			i915.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
+	}
+
+	/* can't enable guc submission without guc */
+	if (!i915.enable_guc_loading)
+		i915.enable_guc_submission = 0;
+}
+
 void intel_uc_init_early(struct drm_i915_private *dev_priv)
 {
 	mutex_init(&dev_priv->guc.send_mutex);
@@ -32,7 +50,10 @@ void intel_uc_init_early(struct drm_i915_private *dev_priv)
 
 void intel_uc_init(struct drm_i915_private *dev_priv)
 {
-	intel_guc_init(dev_priv);
+	intel_sanitize_uc_params(dev_priv);
+
+	if (i915.enable_guc_loading)
+		intel_guc_init(dev_priv);
 }
 
 int intel_uc_load(struct drm_i915_private *dev_priv)
-- 
2.9.3