diff options
| author | Douglas Anderson <dianders@chromium.org> | 2023-09-01 16:39:56 -0700 |
|---|---|---|
| committer | Douglas Anderson <dianders@chromium.org> | 2023-09-21 10:51:55 -0700 |
| commit | 3c4babae3c4a1ae05f8f3f5f3d50c440ead7ca6a (patch) | |
| tree | 43939c4253e5188757bacd17d54c667609e855b4 /drivers/gpu/drm/mgag200/mgag200_drv.c | |
| parent | 10c8204c8b172234f11a0482a89fb4affadfaab5 (diff) | |
drm: Call drm_atomic_helper_shutdown() at shutdown/remove time for misc drivers
Based on grepping through the source code these drivers appear to be
missing a call to drm_atomic_helper_shutdown() at system shutdown time
and at driver remove (or unbind) time. Among other things, this means
that if a panel is in use that it won't be cleanly powered off at
system shutdown time.
The fact that we should call drm_atomic_helper_shutdown() in the case
of OS shutdown/restart and at driver remove (or unbind) time comes
straight out of the kernel doc "driver instance overview" in
drm_drv.c.
A few notes about these fixes:
- I confirmed that these drivers were all DRIVER_MODESET type drivers,
which I believe makes this relevant.
- I confirmed that these drivers were all DRIVER_ATOMIC.
- When adding drm_atomic_helper_shutdown() to the remove/unbind path,
I added it after drm_kms_helper_poll_fini() when the driver had
it. This seemed to be what other drivers did. If
drm_kms_helper_poll_fini() wasn't there I added it straight after
drm_dev_unregister().
- This patch deals with drivers using the component model in similar
ways as the patch ("drm: Call drm_atomic_helper_shutdown() at
shutdown time for misc drivers")
- These fixes rely on the patch ("drm/atomic-helper:
drm_atomic_helper_shutdown(NULL) should be a noop") to simplify
shutdown.
Suggested-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # tilcdc
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230901163944.RFT.5.I771eb4bd03d8772b19e7dcfaef3e2c167bce5846@changeid
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_drv.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_drv.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c index abddf37f0ea1..2fb18b782b05 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.c +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c @@ -10,6 +10,7 @@ #include <linux/pci.h> #include <drm/drm_aperture.h> +#include <drm/drm_atomic_helper.h> #include <drm/drm_drv.h> #include <drm/drm_fbdev_generic.h> #include <drm/drm_file.h> @@ -278,6 +279,12 @@ static void mgag200_pci_remove(struct pci_dev *pdev) struct drm_device *dev = pci_get_drvdata(pdev); drm_dev_unregister(dev); + drm_atomic_helper_shutdown(dev); +} + +static void mgag200_pci_shutdown(struct pci_dev *pdev) +{ + drm_atomic_helper_shutdown(pci_get_drvdata(pdev)); } static struct pci_driver mgag200_pci_driver = { @@ -285,6 +292,7 @@ static struct pci_driver mgag200_pci_driver = { .id_table = mgag200_pciidlist, .probe = mgag200_pci_probe, .remove = mgag200_pci_remove, + .shutdown = mgag200_pci_shutdown, }; drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset); |