On 2014년 12월 18일 22:58, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
>
> The atomic helper to disable planes also uses exynos_update_plane() to
> disable plane so we had to adapt it to both commit and disable planes.
>
> A check for NULL CRTC was added to exynos_plane_mode_set() since planes
> to be disabled have plane_state->crtc set to NULL.
>
> Also win_disable() callback uses plane->crtc as arg for the same reason.
>
> exynos_drm_fb_get_buf_cnt() needs a fb check too to avoid a null pointer.
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_fb.c | 2 +-
> drivers/gpu/drm/exynos/exynos_drm_plane.c | 24 ++++++++++++++++++------
> 2 files changed, 19 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
> index d346d1e..470456d 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
> @@ -136,7 +136,7 @@ unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
>
> exynos_fb = to_exynos_fb(fb);
>
> - return exynos_fb->buf_cnt;
> + return exynos_fb ? exynos_fb->buf_cnt : 0;
This change isn't related with this patch.
> }
>
> struct drm_framebuffer *
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> index 1c67fbc..dfca218 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> @@ -98,6 +98,9 @@ static void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc
> unsigned int actual_w;
> unsigned int actual_h;
>
> + if (!crtc)
> + return;
Ditto.
> +
> actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
> actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
>
> @@ -140,8 +143,6 @@ static void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc
> exynos_plane->crtc_x, exynos_plane->crtc_y,
> exynos_plane->crtc_width, exynos_plane->crtc_height);
>
> - plane->crtc = crtc;
> -
> if (exynos_crtc->ops->win_mode_set)
> exynos_crtc->ops->win_mode_set(exynos_crtc, exynos_plane);
> }
> @@ -179,15 +180,26 @@ exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
> uint32_t src_x, uint32_t src_y,
> uint32_t src_w, uint32_t src_h)
> {
> - struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> + struct exynos_drm_crtc *exynos_crtc;
>
> exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
> crtc_w, crtc_h, src_x >> 16, src_y >> 16,
> src_w >> 16, src_h >> 16);
>
> - if (exynos_crtc->ops->win_commit)
> - exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
> + if (fb) {
> + exynos_crtc = to_exynos_crtc(crtc);
> + if (exynos_crtc->ops->win_commit)
> + exynos_crtc->ops->win_commit(exynos_crtc,
> + exynos_plane->zpos);
> + } else {
> + exynos_crtc = to_exynos_crtc(plane->crtc);
> + if (exynos_crtc->ops->win_disable)
> + exynos_crtc->ops->win_disable(exynos_crtc,
> + exynos_plane->zpos);
> + }
> +
> + plane->crtc = crtc;
> }
>
> static int exynos_disable_plane(struct drm_plane *plane)
> @@ -224,7 +236,7 @@ static int exynos_plane_set_property(struct drm_plane *plane,
>
> static struct drm_plane_funcs exynos_plane_funcs = {
> .update_plane = drm_plane_helper_update,
> - .disable_plane = exynos_disable_plane,
> + .disable_plane = drm_plane_helper_disable,
> .destroy = exynos_plane_destroy,
> .set_property = exynos_plane_set_property,
> };
>
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