diff options
| author | Douglas Anderson <dianders@chromium.org> | 2023-09-02 02:39:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-20 13:59:10 +0300 |
| commit | 69f03be1fa08a66735d53d92d3429c052540e3bf (patch) | |
| tree | 7b33b270d6a36bcca1a3178b211cbfeca85455e2 /drivers/gpu/drm/pl111 | |
| parent | 2755e3757585e8cf1b0a33267eab7519f1c307d8 (diff) | |
| download | linux-69f03be1fa08a66735d53d92d3429c052540e3bf.tar.xz | |
drm: Call drm_atomic_helper_shutdown() at shutdown/remove time for misc drivers
[ Upstream commit 3c4babae3c4a1ae05f8f3f5f3d50c440ead7ca6a ]
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
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/pl111')
| -rw-r--r-- | drivers/gpu/drm/pl111/pl111_drv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index ba3b5b5f0cdf..02e6b74d5016 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -323,12 +323,18 @@ static void pl111_amba_remove(struct amba_device *amba_dev) struct pl111_drm_dev_private *priv = drm->dev_private; drm_dev_unregister(drm); + drm_atomic_helper_shutdown(drm); if (priv->panel) drm_panel_bridge_remove(priv->bridge); drm_dev_put(drm); of_reserved_mem_device_release(dev); } +static void pl111_amba_shutdown(struct amba_device *amba_dev) +{ + drm_atomic_helper_shutdown(amba_get_drvdata(amba_dev)); +} + /* * This early variant lacks the 565 and 444 pixel formats. */ @@ -431,6 +437,7 @@ static struct amba_driver pl111_amba_driver __maybe_unused = { }, .probe = pl111_amba_probe, .remove = pl111_amba_remove, + .shutdown = pl111_amba_shutdown, .id_table = pl111_id_table, }; |