This is a note to let you know that I've just added the patch titled
drm/msm/dsi: improve/fix dsc pclk calculation
to the 6.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-dsi-improve-fix-dsc-pclk-calculation.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f1d650cd58e04e1695d94fe2848127ed9b6f3164
Author: Jonathan Marek <jonathan@xxxxxxxx>
Date: Mon Oct 7 01:01:48 2024 -0400
drm/msm/dsi: improve/fix dsc pclk calculation
[ Upstream commit 24436a540d16ca6a523b8e5441180001c31b6b35 ]
drm_mode_vrefresh() can introduce a large rounding error, avoid it.
Fixes: 7c9e4a554d4a ("drm/msm/dsi: Reduce pclk rate for compression")
Signed-off-by: Jonathan Marek <jonathan@xxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/618432/
Link: https://lore.kernel.org/r/20241007050157.26855-1-jonathan@xxxxxxxx
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 185d7de0bf376..1205aa398e445 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -542,7 +542,7 @@ static unsigned long dsi_adjust_pclk_for_compression(const struct drm_display_mo
int new_htotal = mode->htotal - mode->hdisplay + new_hdisplay;
- return new_htotal * mode->vtotal * drm_mode_vrefresh(mode);
+ return mult_frac(mode->clock * 1000u, new_htotal, mode->htotal);
}
static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode,
