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[01/42] drm/i915: Start using plane scale factor for relative data rate

Message ID 20230823170740.1180212-2-lucas.demarchi@intel.com (mailing list archive)
State New, archived
Headers show
Series Enable Lunar Lake display | expand

Commit Message

Lucas De Marchi Aug. 23, 2023, 5:06 p.m. UTC 
From: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>

BSpec clearly instructs us to use plane scale factor when calculating
relative data rate to be used when allocating DDB blocks for each plane.
For some reason we use scale factor for data_rate calculation, which is
used for BW calculations, however we are not using it for DDB calculations.
So lets fix it as described in BSpec 68907.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Reviewed-by: Garg, Nemesa <nemesa.garg@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230719104833.25366-1-stanislav.lisovskiy@intel.com
(cherry picked from commit a86c75dcdd0374444514c1e40411177ff7afe9bd)
---
 drivers/gpu/drm/i915/display/intel_atomic_plane.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index edee71664332..cb60165bc415 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -217,6 +217,7 @@  intel_plane_relative_data_rate(const struct intel_crtc_state *crtc_state,
 	struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
 	const struct drm_framebuffer *fb = plane_state->hw.fb;
 	int width, height;
+	unsigned int rel_data_rate;
 
 	if (plane->id == PLANE_CURSOR)
 		return 0;
@@ -246,7 +247,11 @@  intel_plane_relative_data_rate(const struct intel_crtc_state *crtc_state,
 		height /= 2;
 	}
 
-	return width * height * fb->format->cpp[color_plane];
+	rel_data_rate = width * height * fb->format->cpp[color_plane];
+
+	return intel_adjusted_rate(&plane_state->uapi.src,
+				   &plane_state->uapi.dst,
+				   rel_data_rate);
 }
 
 int intel_plane_calc_min_cdclk(struct intel_atomic_state *state,