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drm/imx: switch to universal planes

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Use drm_universal_plane_init to create the planes, create the primary
plane first and use drm_crtc_init_with_planes to associate it with
the crtc.
This gets rid of the unused fallback primary plane previously created
by drm_crtc_init and fixes a NULL pointer dereference issue that can
be triggered by a modeset from userspace when fbdev helpers are
enabled [1].

[1] https://lkml.org/lkml/2015/11/4/107

Reported-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Liu Ying <Ying.Liu@freescale.com>
This commit is contained in:
Philipp Zabel
2015-11-06 11:08:02 +01:00
parent 8005c49d9a
commit 4389559980
5 changed files with 20 additions and 20 deletions
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3
drivers/gpu/drm/imx/imx-drm.h
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@@ -9,6 +9,7 @@ struct drm_display_mode;
struct drm_encoder;
struct drm_fbdev_cma;
struct drm_framebuffer;
struct drm_plane;
struct imx_drm_crtc;
struct platform_device;
@@ -24,7 +25,7 @@ struct imx_drm_crtc_helper_funcs {
};
int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
struct imx_drm_crtc **new_crtc,
struct imx_drm_crtc **new_crtc, struct drm_plane *primary_plane,
const struct imx_drm_crtc_helper_funcs *imx_helper_funcs,
struct device_node *port);
int imx_drm_remove_crtc(struct imx_drm_crtc *);