]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
drm/panel: Add device_link from panel device to DRM device
authorJyri Sarha <jsarha@ti.com>
Thu, 26 Apr 2018 08:07:00 +0000 (11:07 +0300)
committerThierry Reding <treding@nvidia.com>
Fri, 18 May 2018 09:22:06 +0000 (11:22 +0200)
commit0c08754b59da5557532d946599854e6df28edc22
treef0ffc11a747bc9d185ec6d62bf8a0ec288cc1e49
parent38992c57c9c8425dc9cb75efe6f9b9255ea627a0
drm/panel: Add device_link from panel device to DRM device

Add device_link from panel device (supplier) to DRM device (consumer)
when drm_panel_attach() is called. This patch should protect the master
DRM driver if an attached panel driver unbinds while it is in use. The
device_link should make sure the DRM device is unbound before the panel
driver becomes unavailable.

The device_link is removed when drm_panel_detach() is called. The
drm_panel_detach() should be called by the consumer DRM driver, not the
panel driver, otherwise both drivers are racing to delete the same link.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b53584fd988d045c13de22d81825395b0ae0aad7.1524727888.git.jsarha@ti.com
drivers/gpu/drm/drm_panel.c
include/drm/drm_panel.h