Hi,
On Sun, Feb 19, 2023 at 12:45:53PM +0100, Frank Oltmanns wrote:
> Fix the XBD599 panel's slight visual stutter by correcting the pixel
> clock speed so that the panel's 60Hz vertical refresh rate is met.
>
> Set the clock speed using the underlying formula instead of a magic
> number. To have a consistent procedure for both panels, set the JH057N
> panel's clock also as a formula.
> ---
> drivers/gpu/drm/panel/panel-sitronix-st7703.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> index 6747ca237ced..cd7d631f7573 100644
> --- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> +++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
> @@ -139,7 +139,7 @@ static const struct drm_display_mode jh057n00900_mode = {
> .vsync_start = 1440 + 20,
> .vsync_end = 1440 + 20 + 4,
> .vtotal = 1440 + 20 + 4 + 12,
> - .clock = 75276,
> + .clock = (720 + 90 + 20 + 20) * (1440 + 20 + 4 + 12) * 60 / 1000,
> .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> .width_mm = 65,
> .height_mm = 130,
> @@ -324,7 +324,7 @@ static const struct drm_display_mode xbd599_mode = {
> .vsync_start = 1440 + 18,
> .vsync_end = 1440 + 18 + 10,
> .vtotal = 1440 + 18 + 10 + 17,
> - .clock = 69000,
> + .clock = (720 + 40 + 40 + 40) * (1440 + 18 + 10 + 17) * 60 / 1000,
> .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> .width_mm = 68,
> .height_mm = 136,
Reviewed-by: Guido Günther <agx@xxxxxxxxxxx>
(I've seen your other patches but it will be some days until I can test
the jh057n00900 panel).
Cheers,
-- Guido
> --
> 2.39.1
>
