On Wed, 18 Oct 2017 12:29:13 +0200, Sagar Arun Kamble <sagar.a.kam...@intel.com> wrote:



On 10/18/2017 4:20 AM, Sujaritha Sundaresan wrote:
Updating GuC and HuC firmware select function to support removing
i915_modparams.enable_guc_loading module parameter.

v2: Clarifying the commit message (Anusha)

v3: Unify seq_puts messages, Re-factoring code as per review (Michal)

v4: Rebase

v5: Separating message unification into a separate patch

v6: Re-factoring code (Sagar, Michal)
     Rebase

v7: Separating from previuos patch (Sagar)
     Rebase

Signed-off-by: Sujaritha Sundaresan <sujaritha.sundare...@intel.com>
Cc: Michal Wajdeczko <michal.wajdec...@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kam...@intel.com>
Cc: Anusha Srivatsa <anusha.sriva...@intel.com>
Cc: Oscar Mateo <oscar.ma...@intel.com>
---
  drivers/gpu/drm/i915/intel_guc_fw.c | 9 ++++-----
  drivers/gpu/drm/i915/intel_guc_fw.h | 2 +-
  drivers/gpu/drm/i915/intel_huc.c    | 4 +++-
  3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_guc_fw.c b/drivers/gpu/drm/i915/intel_guc_fw.c
index ef67a36..5bffeef 100644
--- a/drivers/gpu/drm/i915/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/intel_guc_fw.c
@@ -63,7 +63,7 @@
   *
   * Return: zero when we know firmware, non-zero in other case
Update this documentation about return.
You have dropped call to fw_select in this series. Can you please check.
   */
-int intel_guc_fw_select(struct intel_guc *guc)
+void intel_guc_fw_select(struct intel_guc *guc)
  {
        struct drm_i915_private *dev_priv = guc_to_i915(guc);
  @@ -90,11 +90,10 @@ int intel_guc_fw_select(struct intel_guc *guc)
                guc->fw.major_ver_wanted = GLK_FW_MAJOR;
                guc->fw.minor_ver_wanted = GLK_FW_MINOR;
        } else {
-               DRM_ERROR("No GuC firmware known for platform with GuC!\n");
-               return -ENOENT;
+               if (!HAS_GUC(dev_priv))
This should be HAS_GUC

Hmm, I'm not sure that we really need such check here at all.
We can do proper check *before* calling this function and cover both
Huc and Guc at once.

+                       DRM_ERROR("No GuC FW known for platform with GuC!\n");
+               return;
        }
-
-       return 0;
  }
    /*
diff --git a/drivers/gpu/drm/i915/intel_guc_fw.h b/drivers/gpu/drm/i915/intel_guc_fw.h
index 023f5ba..7f6ccaf 100644
--- a/drivers/gpu/drm/i915/intel_guc_fw.h
+++ b/drivers/gpu/drm/i915/intel_guc_fw.h
@@ -27,7 +27,7 @@
    struct intel_guc;
  -int intel_guc_fw_select(struct intel_guc *guc);
+void intel_guc_fw_select(struct intel_guc *guc);
  int intel_guc_fw_upload(struct intel_guc *guc);
    #endif
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index c8a48cb..fc61779 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -108,7 +108,9 @@ void intel_huc_select_fw(struct intel_huc *huc)
                huc->fw.major_ver_wanted = GLK_HUC_FW_MAJOR;
                huc->fw.minor_ver_wanted = GLK_HUC_FW_MINOR;
        } else {
-               DRM_ERROR("No HuC firmware known for platform with HuC!\n");
+               /* For now, everything with a GuC also has a HuC */
+               if (HAS_GUC(dev_priv))
+                       DRM_ERROR("No HuC FW known for platform with HuC!\n");
                return;
        }
  }
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