linux.git/drivers/gpu/drm/bridge, branch v6.16

Merge tag 'drm-misc-fixes-2025-07-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

2025-07-23T20:49:38+00:00

drm-misc-fixes for v6.16-rc8/final?:
- Revert all uses of drm_gem_object->dmabuf to
  drm_gem_object->import_attach->dmabuf.
- Fix amdgpu returning BIOS cluttered VRAM after resume.
- Scheduler hang fix.
- Revert nouveau ioctl fix as it caused regressions.
- Fix null pointer deref in nouveau.
- Fix unnecessary semicolon in ti_sn_bridge_probe.

Signed-off-by: Dave Airlie 
From: Maarten Lankhorst 
Link: https://lore.kernel.org/r/72235afd-c849-49fe-9cc1-2b1781abdf08@linux.intel.com

drm/bridge: ti-sn65dsi86: Remove extra semicolon in ti_sn_bridge_probe()

2025-07-22T14:46:34+00:00

As reported by the kernel test robot, a recent patch introduced an
unnecessary semicolon. Remove it.

Fixes: 55e8ff842051 ("drm/bridge: ti-sn65dsi86: Add HPD for DisplayPort connector type")
Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202506301704.0SBj6ply-lkp@intel.com/
Reviewed-by: Devarsh Thakkar 
Signed-off-by: Douglas Anderson 
Link: https://lore.kernel.org/r/20250714130631.1.I1cfae3222e344a3b3c770d079ee6b6f7f3b5d636@changeid

Merge tag 'samsung-dsim-fixes-for-v6.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes

2025-07-03T23:40:20+00:00

- Fixed raw pointer leakage and unsafe behavior in printk()
  . Switch from %pK to %p for pointer formatting, as %p is now safer
    and prevents issues like raw pointer leakage and acquiring sleeping
    locks in atomic contexts.

Signed-off-by: Dave Airlie 

From: Inki Dae 
Link: https://lore.kernel.org/r/20250629091742.29956-1-inki.dae@samsung.com

drm/bridge: aux-hpd-bridge: fix assignment of the of_node

2025-06-30T15:43:17+00:00

Perform fix similar to the one in the commit 85e444a68126 ("drm/bridge:
Fix assignment of the of_node of the parent to aux bridge").

The assignment of the of_node to the aux HPD bridge needs to mark the
of_node as reused, otherwise driver core will attempt to bind resources
like pinctrl, which is going to fail as corresponding pins are already
marked as used by the parent device.
Fix that by using the device_set_of_node_from_dev() helper instead of
assigning it directly.

Fixes: e560518a6c2e ("drm/bridge: implement generic DP HPD bridge")
Signed-off-by: Dmitry Baryshkov 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20250608-fix-aud-hpd-bridge-v1-1-4641a6f8e381@oss.qualcomm.com

drm/bridge: panel: move prepare_prev_first handling to drm_panel_bridge_add_typed

2025-06-30T15:42:32+00:00

The commit 5ea6b1702781 ("drm/panel: Add prepare_prev_first flag to
drm_panel") and commit 0974687a19c3 ("drm/bridge: panel: Set
pre_enable_prev_first from drmm_panel_bridge_add") added handling of
panel's prepare_prev_first to devm_panel_bridge_add() and
drmm_panel_bridge_add(). However if the driver calls
drm_panel_bridge_add_typed() directly, then the flag won't be handled
and thus the drm_bridge.pre_enable_prev_first will not be set.

Move prepare_prev_first handling to the drm_panel_bridge_add_typed() so
that there is no way to miss the flag.

Fixes: 5ea6b1702781 ("drm/panel: Add prepare_prev_first flag to drm_panel")
Fixes: 0974687a19c3 ("drm/bridge: panel: Set pre_enable_prev_first from drmm_panel_bridge_add")
Reported-by: Svyatoslav Ryhel 
Closes: https://lore.kernel.org/dri-devel/CAPVz0n3YZass3Bns1m0XrFxtAC0DKbEPiW6vXimQx97G243sXw@mail.gmail.com/
Signed-off-by: Dmitry Baryshkov 
Reviewed-by: Neil Armstrong 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20250220-panel_prev_first-v1-1-b9e787825a1a@linaro.org

drm/bridge: samsung-dsim: Don't use %pK through printk

2025-06-29T09:05:51+00:00

In the past %pK was preferable to %p as it would not leak raw pointer
values into the kernel log.
Since commit ad67b74d2469 ("printk: hash addresses printed with %p")
the regular %p has been improved to avoid this issue.
Furthermore, restricted pointers ("%pK") were never meant to be used
through printk(). They can still unintentionally leak raw pointers or
acquire sleeping locks in atomic contexts.

Switch to the regular pointer formatting which is safer and
easier to reason about.

Signed-off-by: Thomas Weißschuh 
Signed-off-by: Inki Dae

drm/bridge: ti-sn65dsi86: Add HPD for DisplayPort connector type

2025-06-25T14:49:01+00:00

By default, HPD was disabled on SN65DSI86 bridge. When the driver was
added (commit "a095f15c00e27"), the HPD_DISABLE bit was set in pre-enable
call which was moved to other function calls subsequently.
Later on, commit "c312b0df3b13" added detect utility for DP mode. But with
HPD_DISABLE bit set, all the HPD events are disabled[0] and the debounced
state always return 1 (always connected state).

Set HPD_DISABLE bit conditionally based on display sink's connector type.
Since the HPD_STATE is reflected correctly only after waiting for debounce
time (~100-400ms) and adding this delay in detect() is not feasible
owing to the performace impact (glitches and frame drop), remove runtime
calls in detect() and add hpd_enable()/disable() bridge hooks with runtime
calls, to detect hpd properly without any delay.

[0]:  (Pg. 32)

Fixes: c312b0df3b13 ("drm/bridge: ti-sn65dsi86: Implement bridge connector operations for DP")
Cc: Max Krummenacher 
Reviewed-by: Douglas Anderson 
Tested-by: Ernest Van Hoecke 
Signed-off-by: Jayesh Choudhary 
Signed-off-by: Douglas Anderson 
Link: https://lore.kernel.org/r/20250624044835.165708-1-j-choudhary@ti.com

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08T07:07:37+00:00

Move this API to the canonical timer_*() namespace.

[ tglx: Redone against pre rc1 ]

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner 
Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com

drm/bridge: analogix_dp: Fix clk-disable removal

2025-05-28T13:53:31+00:00

Commit 6579a03e68ff ("drm/bridge: analogix_dp: Remove the unnecessary
calls to clk_disable_unprepare() during probing") removed the mismatched
clock_disable calls from analogix_dp_probe.

But that patch was created and sent before
commit e5e9fa9f7aad ("drm/bridge: analogix_dp: Add support to get panel
from the DP AUX bus") was merged, so couldn't know about this change.

So in the original patch the last change is
    if (ret) {
	dev_err(&pdev->dev, "failed to request irq\n");
-		goto err_disable_clk;
+		return ERR_PTR(ret);
    }
    disable_irq(dp->irq);

    return dp;
-
-err_disable_clk:
-	clk_disable_unprepare(dp->clock);
-	return ERR_PTR(ret);
 }
 EXPORT_SYMBOL_GPL(analogix_dp_probe);

the analogix_dp_core.c actually now has the runtime-pm handling between
disable_irq() and return do introducing another goto err_clk_disable there.

So remove that one too and return an error pointer, to not create build
breakage.

Fixes: 6579a03e68ff ("drm/bridge: analogix_dp: Remove the unnecessary calls to clk_disable_unprepare() during probing")
Signed-off-by: Heiko Stuebner 
Reviewed-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20250527225120.3361663-1-heiko@sntech.de
Signed-off-by: Dmitry Baryshkov

drm/bridge: analogix_dp: Remove the unnecessary calls to clk_disable_unprepare() during probing

2025-05-27T20:13:08+00:00

With the commit f37952339cc2 ("drm/bridge: analogix_dp: handle clock via
runtime PM"), the PM operations can help enable/disable the clock. The
err_disable_clk label and clk_disable_unprepare() operations are no
longer necessary because the analogix_dp_resume() will not be called
during probing.

Fixes: f37952339cc2 ("drm/bridge: analogix_dp: handle clock via runtime PM")
Suggested-by: Douglas Anderson 
Reviewed-by: Douglas Anderson 
Signed-off-by: Damon Ding 
Reviewed-by: Heiko Stuebner 
Link: https://lore.kernel.org/r/20250302083043.3197235-1-damon.ding@rock-chips.com
Signed-off-by: Dmitry Baryshkov