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| author | Jonathan Marek <jonathan@marek.ca> | 2024-10-07 01:01:48 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-01 01:58:21 +0100 |
| commit | 9f2361089152467f4819828f7826f1a9aebe1e9a (patch) | |
| tree | 28b096297367a9fb06cc1bf04400e0743d74cb7e /drivers/gpu/drm/msm | |
| parent | dd58a5f8b308f703da491688cf4cfa5f9900b938 (diff) | |
| download | linux-9f2361089152467f4819828f7826f1a9aebe1e9a.tar.gz linux-9f2361089152467f4819828f7826f1a9aebe1e9a.tar.bz2 linux-9f2361089152467f4819828f7826f1a9aebe1e9a.zip | |
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@marek.ca>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/618432/
Link: https://lore.kernel.org/r/20241007050157.26855-1-jonathan@marek.ca
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/msm')
| -rw-r--r-- | drivers/gpu/drm/msm/dsi/dsi_host.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 77b805eacb1b..fcfe612416b0 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -537,7 +537,7 @@ 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, |