[Intel-gfx] [RFC 4/6] drm/i915: Get right max plane stride

[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.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b250b31f6000..b9209b7e71d7 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2703,12 +2703,15 @@ u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
 {
 	struct intel_crtc *crtc;
 	struct intel_plane *plane;
+	enum pipe pipe;
 
 	/*
 	 * 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);
+	pipe = ffs(INTEL_INFO(dev_priv)->pipe_mask) - 1;
+	crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
 	if (!crtc)
 		return 0;
 
-- 
2.24.0