[PATCH v2] drm/exynos: calculate vrefresh instead of use a fixed value
Tobias Jakobi
tjakobi at math.uni-bielefeld.de
Wed May 20 12:11:43 PDT 2015
Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
>
> When mode's vrefresh is zero we should ask DRM core to calculate vrefresh
> for us so we can get the correct value instead of relying on fixed value
> defined in a macro. But if vrefresh is still zero we should fail the
> update.
Even with this we still need to consider crtc->state->adjusted_mode in
fimd_commit(), otherwise vrefresh computed by drm_mode_vrefresh() is
never actually used.
With best wishes,
Tobias
> Suggested-by: Daniel Stone <daniels at collabora.com>
> Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
> ---
> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> index 9819fa6..ea7da0e 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> @@ -42,7 +42,6 @@
> * CPU Interface.
> */
>
> -#define FIMD_DEFAULT_FRAMERATE 60
> #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
>
> /* position control register for hardware window 0, 2 ~ 4.*/
> @@ -329,7 +328,9 @@ static bool fimd_mode_fixup(struct exynos_drm_crtc *crtc,
> struct drm_display_mode *adjusted_mode)
> {
> if (adjusted_mode->vrefresh == 0)
> - adjusted_mode->vrefresh = FIMD_DEFAULT_FRAMERATE;
> + adjusted_mode->vrefresh = drm_mode_vrefresh(mode);
> + if (adjusted_mode->vrefresh == 0)
> + return false;
>
> return true;
> }
>
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