[Intel-gfx] [PATCH v3 5/7] drm/i915: Get first crtc instead of PIPE_A crtc

[Anshuman Gupta]

intel_plane_fb_max_stride should return the max stride of
primary plane for first available pipe in intel device info
pipe_mask.
Similarly glk_force_audio_cdclk() should also use the first
available CRTC instead of pipe 'A' crtc to force the cdclk
changes.

changes since RFC:
- Introduced a helper to get first intel_crtc intel_get_first_crtc. [Ville]
v1:
- Used intel_get_first_crtc() instead of PIPE_A crtc in
  glk_force_audio_cdclk(). [Ville]

Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gu...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_audio.c         | 2 +-
 drivers/gpu/drm/i915/display/intel_display.c       | 5 +++--
 drivers/gpu/drm/i915/display/intel_display_types.h | 6 ++++++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_audio.c 
b/drivers/gpu/drm/i915/display/intel_audio.c
index 30fb7c887ff0..19bf206037c2 100644
--- a/drivers/gpu/drm/i915/display/intel_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -844,7 +844,7 @@ static void glk_force_audio_cdclk(struct drm_i915_private 
*dev_priv,
        struct intel_crtc *crtc;
        int ret;
 
-       crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
+       crtc = intel_get_first_crtc(dev_priv);
        if (!crtc)
                return;
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 41a0f2e9b6b9..172dbe8260c1 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2729,9 +2729,10 @@ u32 intel_plane_fb_max_stride(struct drm_i915_private 
*dev_priv,
 
        /*
         * We assume the primary plane for pipe A has
-        * the highest stride limits of them all.
+        * the highest stride limits of them all,
+        * if in case pipe A is disabled, use the first pipe from pipe_mask.
         */
-       crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
+       crtc = intel_get_first_crtc(dev_priv);
        if (!crtc)
                return 0;
 
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h 
b/drivers/gpu/drm/i915/display/intel_display_types.h
index 380ebe5ee26d..3ca6cf7f3986 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1406,6 +1406,12 @@ vlv_pipe_to_channel(enum pipe pipe)
        }
 }
 
+static inline struct intel_crtc *
+intel_get_first_crtc(struct drm_i915_private *dev_priv)
+{
+       return to_intel_crtc(drm_crtc_from_index(&dev_priv->drm, 0));
+}
+
 static inline struct intel_crtc *
 intel_get_crtc_for_pipe(struct drm_i915_private *dev_priv, enum pipe pipe)
 {
-- 
2.24.0

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