diff options
| author | Brian Norris <briannorris@chromium.org> | 2022-10-19 17:03:49 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-10 18:17:39 +0100 |
| commit | 20150ef6f65ab951e50fc93ea909a36737bc482a (patch) | |
| tree | 3670d37239802a11d912afa5823d395918c1e6dd | |
| parent | 3815f86b166fda5ea388bfc0f4cd059fe9225b6f (diff) | |
drm/rockchip: dsi: Force synchronous probe
commit 81e592f86f7afdb76d655e7fbd7803d7b8f985d8 upstream.
We can't safely probe a dual-DSI display asynchronously
(driver_async_probe='*' or driver_async_probe='dw-mipi-dsi-rockchip'
cmdline), because dw_mipi_dsi_rockchip_find_second() pokes one DSI
device's drvdata from the other device without any locking.
Request synchronous probe, at least until this driver learns some
appropriate locking for dual-DSI initialization.
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20221019170255.2.I6b985b0ca372b7e35c6d9ea970b24bcb262d4fc1@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c index c01461be2d653..1aa3700551f4d 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c @@ -1642,5 +1642,11 @@ struct platform_driver dw_mipi_dsi_rockchip_driver = { .of_match_table = dw_mipi_dsi_rockchip_dt_ids, .pm = &dw_mipi_dsi_rockchip_pm_ops, .name = "dw-mipi-dsi-rockchip", + /* + * For dual-DSI display, one DSI pokes at the other DSI's + * drvdata in dw_mipi_dsi_rockchip_find_second(). This is not + * safe for asynchronous probe. + */ + .probe_type = PROBE_FORCE_SYNCHRONOUS, }, }; |