[Intel-gfx] [PATCH v3 04/12] drm/i915/guc: Add description and comments about guc_log_level parameter

[Sagar Arun Kamble]

guc_log_level parameter takes effect when GuC is loaded which is
controlled through enable_guc parameter. Add this relation info.
in parameter description and documentation.
Earlier, this patch was added to sanitize guc_log_level like old
GuC parameters enable_guc_loading/submission. With new parameter
enable_guc, sanitization of guc_log_level is no more needed.

v2: Added documentation to intel_guc_log.c and param description
about GuC loading dependency. (Michal Wajdeczko)

v3: Removed sanitization of module parameter guc_log_level.
Previous review comments not applicable now.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com> #v2
---
 drivers/gpu/drm/i915/i915_params.c   | 3 ++-
 drivers/gpu/drm/i915/intel_guc_log.c | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index b5f3eb4..a93a6ca 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -155,7 +155,8 @@ struct i915_params i915_modparams __read_mostly = {
 	"(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)");
 
 i915_param_named(guc_log_level, int, 0400,
-	"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
+	"GuC firmware logging level. This takes effect only if GuC is to be "
+	"loaded (depends on enable_guc) (-1:disabled (default), 0-3:enabled)");
 
 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
 	"GuC firmware path to use instead of the default one");
diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index 59a9021..d0131bc 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -34,6 +34,7 @@
  * DOC: GuC firmware log
  *
  * Firmware log is enabled by setting i915.guc_log_level to non-negative level.
+ * This takes effect only if GuC is to be loaded based on enable_guc.
  * Log data is printed out via reading debugfs i915_guc_log_dump. Reading from
  * i915_guc_load_status will print out firmware loading status and scratch
  * registers value.
-- 
1.9.1