On Sun, Jan 11, 2015 at 4:40 AM, Chris Wilson <chris@chris-wilson.co.uk> wrote:

On Sat, Jan 10, 2015 at 02:26:04AM +0530, Vandana Kannan wrote:

Adding a debugfs entry to determine if DRRS is supported or not

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e515aad..544b4c3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2825,6 +2825,23 @@ static int i915_ddb_info(struct seq_file *m, void *unused)
      return 0;
 }

+static int i915_drrs_status(struct seq_file *m, void *unused)
+{
+     struct drm_info_node *node = m->private;
+     struct drm_device *dev = node->minor->dev;
+     struct intel_crtc *crtc;
+
+     for_each_intel_crtc(dev, crtc) {
+             if (crtc->active) {

Don't you want to know which CRTC this is? Would this not be better
extending display_info with the extra CRTC status?

+                     if (crtc->config.has_drrs)

Also it just shows if panel supports drrs, not if it is enabled...

+                             seq_puts(m, "DRRS enabled");
+                     else
+                             seq_puts(m, "DRRS disabled");
+             }
+     }

-Chris

--
Chris Wilson, Intel Open Source Technology Centre
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