kernel/linux.git/drivers/gpu/drm/exynos, branch v3.18.100

drm/exynos: fix error handling in exynos_drm_subdrv_open

2017-04-18T05:55:45+00:00

commit 55c4b906aa2aec3fa66310ec03c6842e34a04b2a upstream. gcc-6 warns about a pointless loop in exynos_drm_subdrv_open: drivers/gpu/drm/exynos/exynos_drm_core.c: In function 'exynos_drm_subdrv_open': drivers/gpu/drm/exynos/exynos_drm_core.c:104:199: error: self-comparison always evaluates to false [-Werror=tautological-compare] list_for_each_entry_reverse(subdrv, &subdrv->list, list) { Here, the list_for_each_entry_reverse immediately terminates because the subdrv pointer is compared to itself as the loop end condition. If we were to take the current subdrv pointer as the start of the list (as we would do if list_for_each_entry_reverse() was not a macro), we would iterate backwards over the &exynos_drm_subdrv_list anchor, which would be even worse. Instead, we need to use list_for_each_entry_continue_reverse() to go back over each subdrv that was successfully opened until the first entry. Signed-off-by: Arnd Bergmann Signed-off-by: Inki Dae Signed-off-by: Greg Kroah-Hartman

drm/exynos: fix possible infinite loop issue

2014-11-10T05:40:10+00:00

This patch fixes possible infinite loop issue by postponing registration to non kms drivers after component_master_add_with_match call, which can be incurred in all cases that non kms driver is probed and then component bind is failed This patch should be applied on top of below patches, http://comments.gmane.org/gmane.comp.video.dri.devel/117740 http://www.spinics.net/lists/linux-samsung-soc/msg38624.html Signed-off-by: Inki Dae

drm/exynos: g2d: fix null pointer dereference

2014-11-10T05:40:09+00:00

This patch fixes a null pointer dereference issue incurred by calling g2d_remove when exynos_drm_platform_probe is failed. cmdlist_pool of g2d is allocated when g2d sub driver is probed. So if exynos_drm_platform_probe is failed, the g2d sub driver is not probed and the cmdlist_pool is still NULL. Signed-off-by: Inki Dae

drm/exynos: resolve infinite loop issue on non multi-platform

2014-11-10T05:40:07+00:00

This patch resovles the infinite loop issue incurred when Exyno drm driver is enabled but all kms drivers are disabled on Exynos board by returning -EPROBE_DEFER only in case that there is kms device registered. Signed-off-by: Inki Dae

drm/exynos: resolve infinite loop issue on multi-platform

2014-11-10T05:40:05+00:00

This patch resolves temporarily infinite loop issue incurred when Exynos drm driver is enabled and multi-platform kernel is used by registering Exynos drm device object only in case of Exynos SoC. So this patch will be replaced with more generic way later. Signed-off-by: Inki Dae

drm/exynos: correct connector->dpms field before resuming

2014-11-02T16:51:28+00:00

During system suspend after connector switch off its dpms field is set to connector previous dpms state. To properly resume dpms field should be set to its actual state (off) before resuming to previous dpms state. Signed-off-by: Andrzej Hajda Signed-off-by: Inki Dae

drm/exynos: enable vblank after DPMS on

2014-11-02T16:51:28+00:00

Before DPMS off driver disables vblank. It should be balanced by vblank enable after DPMS on. The patch fixes issue with page_flip ioctl not being able to acquire vblank counter introduced by patch: drm: Always reject drm_vblank_get() after drm_vblank_off() Signed-off-by: Andrzej Hajda Signed-off-by: Inki Dae

drm/exynos: init kms poll at the end of initialization

2014-11-02T16:51:28+00:00

HPD events can be generated by components even if drm_dev is not fully initialized, to skip such events kms poll initialization should be performed at the end of load callback followed directly by forced connection detection. Signed-off-by: Andrzej Hajda Signed-off-by: Inki Dae

drm/exynos: propagate plane initialization errors

2014-11-02T16:51:28+00:00

In case of error during plane initialization load callback incorrectly return success, this patch fixes it. Signed-off-by: Andrzej Hajda Signed-off-by: Inki Dae

drm/exynos: vidi: fix build warning

2014-11-02T16:51:27+00:00

encoder object isn't used anymore so remove it. Signed-off-by: Inki Dae