Hi Dave,
Some urgent regression fixes to booting failures Exynos DRM occured.
Summary:
- Fix two urgent null pointer dereference bugs in case of enabling
or disabling IOMMU. There was two cases to these issues.
One is that plane->crtc is accessed by exynos_disable_plane()
when device tree binding is broken so device driver tries
to release, which means that the mode set operation isn't invoked yet
so plane->crtc is still NULL and exynos_disable_plane() will access
NULL pointer. This issue is fixed by checking if the plane->crtc
is NULL or not in exynos_disable_plane()
Other is that fimd_wait_for_vblank() is called to avoid from page fault
with IOMMU before the ctx object is created. At this time,
fimd_wait_for_vblank() tries to access ctx->crtc but the ctx->crtc
is still NULL because exynos_drm_crtc_create() isn't called yet.
This issue is fixed by creating a crtc object and setting it to
ctx->crtc prior to fimd_wait_for_vblank() call.
For more details, you can refer to below an e-mail thread,
http://www.spinics.net/lists/linux-samsung-soc/msg42436.html
- Remove unnecessary file not used and fix trivial issues.
Plese, kindly let me know if there is any problem.
Thanks,
Inki Dae
The following changes since commit 046d669c62f37323ef0329c41d83a03c06b2087d:
[PATCH] drm/mm: Fix support 4 GiB and larger ranges (2015-03-16 06:28:50 +1000)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos exynos-drm-fixes
for you to fetch changes up to cdbfca890714c14cafb6f65cab89b3e3ffad876f:
drm/exynos: fix the initialization order in FIMD (2015-03-18 20:41:19 +0900)
----------------------------------------------------------------
Andrzej Hajda (1):
drm/exynos: remove unused files
Charles Keepax (1):
drm/exynos: Check for NULL dereference of crtc
Dan Carpenter (1):
drm/exynos: IS_ERR() vs NULL bug
Hyungwon Hwang (1):
drm/exynos: fix the initialization order in FIMD
Inki Dae (1):
drm/exynos: fix typo config name correctly.
drivers/gpu/drm/exynos/Kconfig | 2 +-
drivers/gpu/drm/exynos/exynos7_drm_decon.c | 4 +-
drivers/gpu/drm/exynos/exynos_drm_connector.c | 245 -------------------------
drivers/gpu/drm/exynos/exynos_drm_connector.h | 20 --
drivers/gpu/drm/exynos/exynos_drm_fimd.c | 29 ++-
drivers/gpu/drm/exynos/exynos_drm_plane.c | 2 +-
6 files changed, 15 insertions(+), 287 deletions(-)
delete mode 100644 drivers/gpu/drm/exynos/exynos_drm_connector.c
delete mode 100644 drivers/gpu/drm/exynos/exynos_drm_connector.h
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