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devm_drm_bridge_alloc() API
devm_drm_bridge_alloc() is the new API to be used for allocating (and
partially initializing) a private driver struct embedding a struct
drm_bridge.
For many drivers having a simple code flow in the probe function, this
commit does a mass conversion automatically with the following semantic
patch. The changes have been reviewed manually for correctness as well as
to find any false positives.
The patch has been applied with the explicit exclusion of bridge/panel.c,
handled by a separate patch.
After applying the semantic patch, manually fixed these issues:
- 4 drivers need ERR_CAST() instead of PTR_ERR() as the function calling
devm_drm_bridge_alloc() returns a pointer
- re-added empty lines and comments that the script had removed but that
should stay
@@
type T;
identifier C;
identifier BR;
expression DEV;
expression FUNCS;
@@
-T *C;
+T *C;
...
(
-C = devm_kzalloc(DEV, ...);
-if (!C)
- return -ENOMEM;
+C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS);
+if (IS_ERR(C))
+ return PTR_ERR(C);
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-C = devm_kzalloc(DEV, ...);
-if (!C)
- return ERR_PTR(-ENOMEM);
+C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS);
+if (IS_ERR(C))
+ return PTR_ERR(C);
)
...
-C->BR.funcs = FUNCS;
Reviewed-by: Manikandan Muralidharan <manikandan.m@microchip.com> # microchip-lvds.c
Reviewed-by: Douglas Anderson <dianders@chromium.org> # parade-ps8640
Tested-by: Douglas Anderson <dianders@chromium.org> # parade-ps8640
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250509-drm-bridge-convert-to-alloc-api-v3-2-b8bc1f16d7aa@bootlin.com
[Luca: fixed trivial patch conflict in adv7511_drv.c while applying]
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
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Linux 6.15-rc5, requested by tzimmerman for fixes required in drm-next.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Interrupt handlers run with interrupts disabled so it is not necessary
to protect them against reentrancy.
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://lore.kernel.org/r/20250428-drm_adp_fixes-v2-4-912e081e55d8@jannau.net
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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Calling drm_crtc_vblank_on() drm_crtc_helper_funcs' atomic_enable is
expected to enable vblank interrupts. It may have been avoided here to
due to drm_crtc_vblank_get()'s error behavior after
drm_crtc_vblank_reset(). With that fixed in the preceding change the
driver can call drm_crtc_vblank_on() from adp_crtc_atomic_enable().
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://lore.kernel.org/r/20250428-drm_adp_fixes-v2-3-912e081e55d8@jannau.net
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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drm_crtc_vblank_get() may fail when it's called before
drm_crtc_vblank_on() on a resetted CRTC. This occurs in
drm_crtc_helper_funcs' atomic_flush() calls after
drm_atomic_helper_crtc_reset() for example directly after probe. Send
the vblank event directly in such cases. Avoids following warning in
the subsequent drm_crtc_vblank_put() call from the vblank irq handler as
below:
adp 228200000.display-pipe: [drm] drm_WARN_ON(atomic_read(&vblank->refcount) == 0)
WARNING: CPU: 5 PID: 1206 at drivers/gpu/drm/drm_vblank.c:1247 drm_vblank_put+0x158/0x170
...
Call trace:
drm_vblank_put+0x158/0x170 (P)
drm_crtc_vblank_put+0x24/0x38
adp_fe_irq+0xd8/0xe8 [adpdrm]
__handle_irq_event_percpu+0x94/0x318
handle_irq_event+0x54/0xd0
handle_fasteoi_irq+0xa8/0x240
handle_irq_desc+0x3c/0x68
generic_handle_domain_irq+0x24/0x40
Modifying `crtc->state->event` here is fine as crtc->mutex is locked by
the non-async atomic commit. In retrospect this looks so obvious that it
doesn't warrant a comment in the file.
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Link: https://lore.kernel.org/r/20250428-drm_adp_fixes-v2-2-912e081e55d8@jannau.net
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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The lock is used in the interrupt handler so use spin_lock_irqsave to
disable interrupts and avoid deadlocks with the irq handler.
Fixes: 332122eba628 ("drm: adp: Add Apple Display Pipe driver")
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://lore.kernel.org/r/20250428-drm_adp_fixes-v2-1-912e081e55d8@jannau.net
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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Backmerging to get v6.15-rc1 into drm-misc-next. Also fixes a
build issue when enabling CONFIG_DRM_SCHED_KUNIT_TEST.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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The drm_bridge structure contains an encoder pointer that is widely used
by bridge drivers. This pattern is largely documented as deprecated in
other KMS entities for atomic drivers.
However, one of the main use of that pointer is done in attach to just
call drm_bridge_attach on the next bridge to add it to the bridge list.
While this dereferences the bridge->encoder pointer, it's effectively
the same encoder the bridge was being attached to.
We can make it more explicit by adding the encoder the bridge is
attached to to the list of attach parameters. This also removes the need
to dereference bridge->encoder in most drivers.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313-bridge-connector-v6-1-511c54a604fb@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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The __drmm_universal_plane_alloc() function doesn't return NULL, it
returns error pointers. Update the check to match.
Fixes: 332122eba628 ("drm: adp: Add Apple Display Pipe driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/14a845e8-54d0-45f8-b8b9-927609d92ede@stanley.mountain
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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The print function dev_err() is redundant because platform_get_irq_byname()
already prints an error.
./drivers/gpu/drm/adp/adp_drv.c:470:2-9: line 470 is redundant because platform_get_irq() already prints an error.
./drivers/gpu/drm/adp/adp_drv.c:476:2-9: line 476 is redundant because platform_get_irq() already prints an error.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=19211
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250305020546.96564-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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This display controller is present on M-series chips and is used
to drive the touchbar display.
Co-developed-by: Janne Grunau <j@jannau.net>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250224-adpdrm-v8-2-cccf96710f0f@gmail.com
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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