[PATCH] drm/edid: Simplify min_pixel_clock_rate calculation

From: Jonathan Cavitt

Date: Tue Apr 28 2026 - 13:18:32 EST


In calculate_ovt_min_htotal, we compute min_pixel_clock_rate as
max_vrate * min_htotal * min_vtotal. However, we already calculated the
value of max_vrate * min_vtotal as min_line_rate. So, just use that as
part of the calculation.

Signed-off-by: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Maxime Ripard <mripard@xxxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: David Airlie <airlied@xxxxxxxxx>
Cc: Simona Vetter <simona@xxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 63814af7f1c1..9f9c9c65296f 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5513,7 +5513,7 @@ static u32 calculate_ovt_min_htotal(const struct cta_rid *rid,

min_htotal = rid->hactive + max(OVT_MIN_HBLANK_444, *min_hblank);

- min_pixel_clock_rate = max_vrate * min_htotal * min_vtotal;
+ min_pixel_clock_rate = min_line_rate * min_htotal;

htotal_granularity_chunk =
roundup_pow_of_two(DIV64_U64_ROUND_UP(min_pixel_clock_rate,
--
2.53.0