AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 15:50:59 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/rockchip: vop: Disable planes when disabling CRTC

Browse Source 
When a VOP is re-enabled, it will start scanning right away the
framebuffers that were configured from the last time, even if those have
been destroyed already.

To prevent the VOP from trying to access freed memory, disable all its
windows when the CRTC is being disabled, then each window will get a
valid framebuffer address before it's enabled again.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://lkml.kernel.org/g/CAAObsKAv+05ih5U+=4kic_NsjGMhfxYheHR8xXXmacZs+p5SHw@mail.gmail.com
This commit is contained in:
Tomeu Vizoso 2016-03-22 16:08:04 +01:00 committed by Mark Yao
parent eac5ad8861
commit 3ed6c64911
1 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
View File

@ -499,10 +499,25 @@ static void vop_enable(struct drm_crtc *crtc)
static void vop_crtc_disable(struct drm_crtc *crtc)
{
struct vop *vop = to_vop(crtc);
int i;
if (!vop->is_enabled)
return;
/*
* We need to make sure that all windows are disabled before we
* disable that crtc. Otherwise we might try to scan from a destroyed
* buffer later.
*/
for (i = 0; i < vop->data->win_size; i++) {
struct vop_win *vop_win = &vop->win[i];
const struct vop_win_data *win = vop_win->data;
spin_lock(&vop->reg_lock);
VOP_WIN_SET(vop, win, enable, 0);
spin_unlock(&vop->reg_lock);
}
drm_crtc_vblank_off(crtc);
/*