Re: [PATCH v8 1/6] drm/i915 : Unifying seq_puts messages for feature support

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On 10/25/2017 06:31 AM, Michal Wajdeczko wrote:
On Tue, 24 Oct 2017 19:21:20 +0200, Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx> wrote:

Unifying the various seq_puts messages in debugfs to the simplest one for
feature support.

v2: Clarifying the commit message (Anusha)

v3: Re-factoring code as per review (Michal)

v4: Rebase

v5: Split from following patch

v6: Re-factoring code (Michal, Sagar)
    Clarifying commit message (Sagar)

v7: Generalizing subject to drm/i915 (Sagar)

v8: Omitting DRRS seq_puts unification (Michal)

Suggested by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Signed-off-by: Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx>
Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Cc: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index c65e381..8edd029 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1641,7 +1641,7 @@ static int i915_fbc_status(struct seq_file *m, void *unused)
     struct drm_i915_private *dev_priv = node_to_i915(m->private);
    if (!HAS_FBC(dev_priv)) {
-        seq_puts(m, "FBC unsupported on this chipset\n");
+        seq_puts(m, "not supported\n");
         return 0;
     }
@@ -1809,7 +1809,7 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
     unsigned int max_gpu_freq, min_gpu_freq;
    if (!HAS_LLC(dev_priv)) {
-        seq_puts(m, "unsupported on this chipset\n");
+        seq_puts(m, "not supported\n");
         return 0;
     }
@@ -2361,8 +2361,10 @@ static int i915_huc_load_status_info(struct seq_file *m, void *data)
     struct drm_i915_private *dev_priv = node_to_i915(m->private);
     struct drm_printer p;
-    if (!HAS_HUC_UCODE(dev_priv))
+    if (!HAS_GUC(dev_priv)) {

Hmm, I think that in above code we should use HAS_HUC defined as:

/* HuC is inherent part of the GuC ... */
#define HAS_HUC(dev_priv)    HAS_GUC(dev_priv)

to make it clear that code checks HuC sub-feature (not other part
of the GuC or GuC itself). And additionally we can use above define
to explicitly document relation between GuC and HuC.

Michal

Sure, I will include the HAS_HUC condition and a comment that clarifies the HuC and GuC tie in the next revision.

+        seq_puts(m, "not supported\n");
         return 0;
+    }
    p = drm_seq_file_printer(m);
     intel_uc_fw_dump(&dev_priv->huc.fw, &p);
@@ -2380,8 +2382,10 @@ static int i915_guc_load_status_info(struct seq_file *m, void *data)
     struct drm_printer p;
     u32 tmp, i;
-    if (!HAS_GUC_UCODE(dev_priv))
+    if (!HAS_GUC(dev_priv)) {
+        seq_puts(m, "not supported\n");
         return 0;
+    }
    p = drm_seq_file_printer(m);
     intel_uc_fw_dump(&dev_priv->guc.fw, &p);
@@ -2650,7 +2654,7 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
     bool enabled = false;
    if (!HAS_PSR(dev_priv)) {
-        seq_puts(m, "PSR not supported\n");
+        seq_puts(m, "not supported\n");
         return 0;
     }

Thanks for the review.

Regards,

Sujaritha
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