From: Ville Syrjälä <ville.syrj...@linux.intel.com>
According to bspec icl+ no longer need any extra cdclk guardband
for 64bpp formats. Make it so.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/skl_universal_plane.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c
b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 5127489a0446..098636c811a8 100644
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -286,6 +286,15 @@ bool icl_is_hdr_plane(struct drm_i915_private *dev_priv,
enum plane_id plane_id)
icl_hdr_plane_mask() & BIT(plane_id);
}
+static int icl_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ unsigned int pixel_rate = intel_plane_pixel_rate(crtc_state,
plane_state);
+
+ /* two pixels per clock */
+ return DIV_ROUND_UP(pixel_rate, 2);
+}
+
static void
glk_plane_ratio(const struct intel_plane_state *plane_state,
unsigned int *num, unsigned int *den)
@@ -1980,7 +1989,7 @@ skl_universal_plane_create(struct drm_i915_private
*dev_priv,
plane->min_width = icl_plane_min_width;
plane->max_width = icl_plane_max_width;
plane->max_height = icl_plane_max_height;
- plane->min_cdclk = glk_plane_min_cdclk;
+ plane->min_cdclk = icl_plane_min_cdclk;
} else if (DISPLAY_VER(dev_priv) >= 10) {
plane->max_width = glk_plane_max_width;
plane->max_height = skl_plane_max_height;
--
2.26.2
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