On Thu, Nov 12, 2015 at 11:11:20AM -0200, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
>
> Fixes an regression added by 3ae2436 (drm/exynos/mixer: replace
> direct cross-driver call with drm mode). The whole atomic update
> was failing if the hdmi display is not present/active. Add a test
> to only run atomic_check() if the CRTC is active.
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_crtc.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index b3ba27f..1d3ca0a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -55,6 +55,9 @@ static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
> {
> struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
>
> + if (!state->active)
> + return 0;
> +
> if (exynos_crtc->ops->atomic_check)
> return exynos_crtc->ops->atomic_check(exynos_crtc, state);
>
This looks like something that the core should be doing.
Thierry
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