Hello Andrzej,
Andrzej Hajda wrote:
> crtc::mode_fixup callback is required by crtcs which use internally
> different mode than requested by user - case of Exynos Mixer.
"...which internally use a different..."
Reviewed-by: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
With one suggestion below.
> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_crtc.c | 15 +++++++++++++++
> drivers/gpu/drm/exynos/exynos_drm_drv.h | 3 +++
> 2 files changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index 6ce0821..dc01342 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -95,8 +95,23 @@ static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
> return MODE_OK;
> }
>
> +static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
> + const struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode)
> +{
> + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> +
> + if (exynos_crtc->ops->mode_fixup)
> + return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
> + adjusted_mode);
> +
> + return true;
> +}
> +
> +
> static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
> .mode_valid = exynos_crtc_mode_valid,
> + .mode_fixup = exynos_crtc_mode_fixup,
> .atomic_check = exynos_crtc_atomic_check,
> .atomic_begin = exynos_crtc_atomic_begin,
> .atomic_flush = exynos_crtc_atomic_flush,
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index cf131c2..e8bcc72 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -136,6 +136,9 @@ struct exynos_drm_crtc_ops {
> u32 (*get_vblank_counter)(struct exynos_drm_crtc *crtc);
> enum drm_mode_status (*mode_valid)(struct exynos_drm_crtc *crtc,
> const struct drm_display_mode *mode);
> + bool (*mode_fixup)(struct exynos_drm_crtc *crtc,
> + const struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode);
I'm always wary when I encounter a bool as return value, since to check what
true/false actually encodes, I need to have some reference which I can check.
Just go for an integer here and use standard convention that negative values are
errors?
> int (*atomic_check)(struct exynos_drm_crtc *crtc,
> struct drm_crtc_state *state);
> void (*atomic_begin)(struct exynos_drm_crtc *crtc);
>
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