Commit de04bb0089 ("drm/panel/panel-simple: Use the new allocation in
place of devm_kzalloc()") moved the call to drm_panel_init into the
devm_drm_panel_alloc(), which needs a connector type to initialize
properly.
In the panel-dpi compatible case, the passed panel_desc structure is an
empty one used as a discriminant, and the connector type it contains
isn't actually initialized.
It is initialized through a call to panel_dpi_probe() later in the
function, which used to be before the call to drm_panel_init() that got
merged into devm_drm_panel_alloc().
So, we do need a proper panel_desc pointer before the call to
devm_drm_panel_alloc() now. All cases associate their panel_desc with
the panel compatible and use of_device_get_match_data, except for the
panel-dpi compatible.
In that case, we're expected to call panel_dpi_probe, which will
allocate and initialize the panel_desc for us.
Let's create such a helper function that would be called first in the
driver and will lookup the desc by compatible, or allocate one if
relevant.
Reported-by: Francesco Dolcini <francesco@dolcini.it>
Closes: https://lore.kernel.org/all/20250612081834.GA248237@francesco-nb/
Fixes: de04bb0089 ("drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc()")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Colibri iMX6
Link: https://lore.kernel.org/r/20250626-drm-panel-simple-fixes-v2-4-5afcaa608bdc@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
In order to fix the regession introduced by commit de04bb0089
("drm/panel/panel-simple: Use the new allocation in place of
devm_kzalloc()"), we need to move the panel_desc lookup into the common
panel_simple_probe() function.
There's two callers for that function, the probe implementations of the
platform and MIPI-DSI drivers panel-simple implements.
The MIPI-DSI driver's probe will need to access the current panel_desc
to initialize properly, which won't be possible anymore if we make that
lookup in panel_simple_probe().
However, we can make panel_simple_probe() return the initialized
panel_simple structure it allocated, which will contain a pointer to the
associated panel_desc in its desc field.
This doesn't fix de04bb0089 ("drm/panel/panel-simple: Use the new
allocation in place of devm_kzalloc()") still, but makes progress
towards that goal.
Fixes: de04bb0089 ("drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc()")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Colibri iMX6
Link: https://lore.kernel.org/r/20250626-drm-panel-simple-fixes-v2-3-5afcaa608bdc@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
If the panel-simple driver is probed from a panel-dpi compatible, the
driver will use an empty panel_desc structure as a descriminant. It
will then allocate and fill another panel_desc as part of its probe.
However, that allocation needs to happen after the panel_simple
structure has been allocated, since panel_dpi_probe(), the function
doing the panel_desc allocation and initialization, takes a panel_simple
pointer as an argument.
This pointer is used to fill the panel_simple->desc pointer that is
still initialized with the empty panel_desc when panel_dpi_probe() is
called.
Since commit de04bb0089 ("drm/panel/panel-simple: Use the new
allocation in place of devm_kzalloc()"), we will need the panel
connector type found in panel_desc to allocate panel_simple. This
creates a circular dependency where we need panel_desc to create
panel_simple, and need panel_simple to create panel_desc.
Let's break that dependency by making panel_dpi_probe simply return the
panel_desc it initialized and move the panel_simple->desc assignment to
the caller.
This will not fix the breaking commit entirely, but will move us towards
the right direction.
Fixes: de04bb0089 ("drm/panel/panel-simple: Use the new allocation in place of devm_kzalloc()")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Colibri iMX6
Link: https://lore.kernel.org/r/20250626-drm-panel-simple-fixes-v2-2-5afcaa608bdc@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This will be especially useful for generic panels (like panel-simple)
which can take different code path depending on if they are MIPI-DSI
devices or platform devices.
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Colibri iMX6
Link: https://lore.kernel.org/r/20250626-drm-panel-simple-fixes-v2-1-5afcaa608bdc@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
According to Bspec, bits 0~9 of MI_STORE_DATA_IMM must not exceed 0x3FE.
The macro MI_SDI_NUM_QW(x) evaluates to 2 * x + 1, which means the
condition 2 * x + 1 <= 0x3FE must be satisfied. Therefore, the maximum
valid value for x is 0x1FE, not 0x1FF.
v2
- Replace 0x1fe with macro MAX_PTE_PER_SDI (Auld, Matthew & Patelczyk, Maciej)
v3
- Change macro MAX_PTE_PER_SDI from 0x1fe to 0x1feU (De Marchi, Lucas)
Bspec: 60246
Fixes: 9c44fd5f6e ("drm/xe: Add migrate layer functions for SVM support")
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Brian3 Nguyen <brian3.nguyen@intel.com>
Cc: Alex Zuo <alex.zuo@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Maciej Patelczyk <maciej.patelczyk@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Suggested-by: Shuicheng Lin <shuicheng.lin@intel.com>
Signed-off-by: Jia Yao <jia.yao@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
Link: https://lore.kernel.org/r/20250612224620.161105-1-jia.yao@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
It feels to me like load is closer to the intention than init_hw.
It makes the init calls slightly less confusing to me. :)
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-24-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
xe_uc_init_hw() is called multiple times from xe_gt.c,
and that makes the name xe_uc_fini_hw(), called for a different
reason in xe_guc.c confusing.
Remove it and inline the xe_uc_sanitize_reset into xe_guc.c directly.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-23-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Now that all previous allocations are gone, ensure no new allocations
will ever be done before xe_display_init_early(), by moving the call
that allows allocations downwards.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-21-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Now that we added the separate step of initialising GUC in
xe_gt_init_early, it should be ok to initialise the minimum during early
init, and the rest after allocations are allowed.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-20-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
s/gt_fw_domain_init/gt_init_with_gt_forcewake()/
s/all_fw_domain_init/gt_init_with_all_forcewake()/
Clarify that the functions are the part of gt_init() that are called
with the respective power domains held. all_domain() of course only
works after discovering and initialisation of force_wake on all engines,
that's why the split is needed in the first place.
Suggested-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-19-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
After discussion with Lucas De Marchi, it turns out that is the
specific caller requiring a dump. This allows us to cleanup
gt_init in a bit.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-18-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
After mcr_init_early, we need to be able to do VRAM and CCS probing
without hwconfig probe. Fortunately the relevant registers are all
instance 0, which fortunately means no dependencies on further initialization
is required.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-17-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Add a 2-stage GuC init. An early one for everything that is needed
for VF, and a full one that loads GuC and is allowed to do allocations.
Link: https://lore.kernel.org/r/20250619104858.418440-16-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
We want to split up GUC init to an alloc and noalloc part to keep the
init path the same for VF and !VF as much as possible.
Everything in vf_guc_init should be done as early as possible, otherwise
VRAM probing becomes impossible.
Also move xe_gt_mmio_init to the end of xe_gt_init_early(), cleaning up
the init in xe_device slightly.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-15-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
memirqs require allocations into GGTT, which we cannot use until
after display is enabled.
Now that the initialisation of interrupts is postponed, move memirq
init too.
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ilia Levi <ilia.levi@intel.com>
Link: https://lore.kernel.org/r/20250619104858.418440-14-dev@lankhorst.se
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Add runtime PM since we might call populate_mm on a foreign device.
v3:
- Fix a kerneldoc failure (Matt Brost)
- Revert the bo type change from device to kernel (Matt Brost)
v4:
- Add an assert in xe_svm_alloc_vram (Matt Brost)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250619134035.170086-4-thomas.hellstrom@linux.intel.com
Add an operation to populate a part of a drm_mm with device
private memory. Clarify how migration using it is intended
to work.
v3:
- Kerneldoc fixes and updates (Matt Brost).
v4:
- More kerneldoc fixes. Rebase.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250619134035.170086-3-thomas.hellstrom@linux.intel.com
The migration functionality and track-keeping of per-pagemap VRAM
mapped to the CPU mm is not per GPU_vm, but rather per pagemap.
This is also reflected by the functions not needing the drm_gpusvm
structures. So move to drm_pagemap.
With this, drm_gpusvm shouldn't really access the page zone-device-data
since its meaning is internal to drm_pagemap. Currently it's used to
reject mapping ranges backed by multiple drm_pagemap allocations.
For now, make the zone-device-data a void pointer.
Alter the interface of drm_gpusvm_migrate_to_devmem() to ensure we don't
pass a gpusvm pointer.
Rename CONFIG_DRM_XE_DEVMEM_MIRROR to CONFIG_DRM_XE_PAGEMAP.
Matt is listed as author of this commit since he wrote most of the code,
and it makes sense to retain his git authorship.
Thomas mostly moved the code around.
v3:
- Kerneldoc fixes (CI)
- Don't update documentation about how the drm_pagemap
migration should be interpreted until upcoming
patches where the functionality is implemented.
(Matt Brost)
v4:
- More kerneldoc fixes around timeslice_ms
(Himal Ghimiray, Matt Brost)
v6:
- Fix an uninitialized pagemap pointer (CI)
Co-developed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250619134035.170086-2-thomas.hellstrom@linux.intel.com
To avoid duplicating the tricky bo locking implementation,
Implement ttm_lru_walk_for_evict() using the guarded bo LRU iteration.
To facilitate this, support ticketlocking from the guarded bo LRU
iteration.
v2:
- Clean up some static function interfaces (Christian König)
- Fix Handling -EALREADY from ticketlocking in the loop by
skipping to the next item. (Intel CI)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250623155313.4901-4-thomas.hellstrom@linux.intel.com
Instead of the struct ttm_operation_ctx, Pass a struct ttm_lru_walk_arg
to enable us to easily extend the walk functionality, and to
implement ttm_lru_walk_for_evict() using the guarded LRU iteration.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250623155313.4901-3-thomas.hellstrom@linux.intel.com
Let the locking functions take the new struct ttm_lru_walk_arg
as argument in order for them to be easily used from both
types of walk.
v2:
- Whitespace fix
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250623155313.4901-2-thomas.hellstrom@linux.intel.com
There was an error pointer vs NULL bug in __igt_breadcrumbs_smoketest().
The __mock_request_alloc() function implements the
smoketest->request_alloc() function pointer. It was supposed to return
error pointers, but it propogates the NULL return from mock_request()
so in the event of a failure, it would lead to a NULL pointer
dereference.
To fix this, change the mock_request() function to return error pointers
and update all the callers to expect that.
Fixes: 52c0fdb25c ("drm/i915: Replace global breadcrumbs with per-context interrupt tracking")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://lore.kernel.org/r/685c1417.050a0220.696f5.5c05@mx.google.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
As of commit 92ac7de317 ("gpiolib: don't allow setting values on input
lines"), the GPIO core makes sure values cannot be set on input lines.
Remove the unnecessary check.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20250620074951.32758-1-brgl@bgdev.pl
To the best of my knowledge, all drivers in the mainline kernel adding a
DRM bridge are now converted to using devm_drm_bridge_alloc() for
allocation and initialization. Among others this ensures initialization of
the bridge refcount, allowing dynamic allocation lifetime.
devm_drm_bridge_alloc() is now mandatory for all new bridges. Code using
the old pattern ([devm_]kzalloc + filling the struct fields +
drm_bridge_add) is not allowed anymore.
Any drivers that might have been missed during the conversion, patches in
flight towards mainline and out-of-tre drivers still using the old pattern
will already be caught by a warning looking like:
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 2 PID: 83 at lib/refcount.c:25 refcount_warn_saturate+0x120/0x148
[...]
Call trace:
refcount_warn_saturate+0x120/0x148 (P)
drm_bridge_get.part.0+0x70/0x98 [drm]
drm_bridge_add+0x34/0x108 [drm]
sn65dsi83_probe+0x200/0x480 [ti_sn65dsi83]
[...]
This warning comes from the refcount code and happens because
drm_bridge_add() is increasing the refcount, which is uninitialized and
thus initially zero.
Having a warning and the corresponding stack trace is surely useful, but
the warning text does not clarify the root problem nor how to fix it.
Add a DRM_WARN() just before increasing the refcount, so the log will be
much more readable:
[drm] DRM bridge corrupted or not allocated by devm_drm_bridge_alloc()
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
[...etc...]
A DRM_WARN is used because drm_warn and drm_WARN require a struct
drm_device pointer which is not yet available when adding a bridge.
Do not print the dev_name() in the warning because struct drm_bridge has no
pointer to the struct device. The affected driver should be easy to catch
based on the following stack trace however.
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250620-drm-bridge-alloc-getput-drm-bridge-c-v9-3-ca53372c9a84@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
During driver probe we might be briefly using CT safe mode, which
is based on a delayed work, but usually we are able to stop this
once we have IRQ fully operational. However, if we abort the probe
quite early then during unwind we might try to destroy the workqueue
while there is still a pending delayed work that attempts to restart
itself which triggers a WARN.
This was recently observed during unsuccessful VF initialization:
[ ] xe 0000:00:02.1: probe with driver xe failed with error -62
[ ] ------------[ cut here ]------------
[ ] workqueue: cannot queue safe_mode_worker_func [xe] on wq xe-g2h-wq
[ ] WARNING: CPU: 9 PID: 0 at kernel/workqueue.c:2257 __queue_work+0x287/0x710
[ ] RIP: 0010:__queue_work+0x287/0x710
[ ] Call Trace:
[ ] delayed_work_timer_fn+0x19/0x30
[ ] call_timer_fn+0xa1/0x2a0
Exit the CT safe mode on unwind to avoid that warning.
Fixes: 09b286950f ("drm/xe/guc: Allow CTB G2H processing without G2H IRQ")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250612220937.857-3-michal.wajdeczko@intel.com
(cherry picked from commit 2ddbb73ec2)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Only need the flush for DPT host updates here. Normal GGTT updates don't
need special flush.
Fixes: 01570b4469 ("drm/xe/bmg: implement Wa_16023588340")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: stable@vger.kernel.org # v6.12+
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250606104546.1996818-4-matthew.auld@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 35db1da40c)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Flushing l2 is only needed after all data has been written.
Fixes: 01570b4469 ("drm/xe/bmg: implement Wa_16023588340")
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: stable@vger.kernel.org # v6.12+
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://lore.kernel.org/r/20250606104546.1996818-3-matthew.auld@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 0dd2dd0182)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
The AM62x and AM62Px SoCs feature 2 OLDI TXes each, which makes it
possible to connect them in dual-link or cloned single-link OLDI display
modes. The current OLDI support in tidss_dispc.c can only support for
a single OLDI TX, connected to a VP and doesn't really support
configuration of OLDIs in the other modes. The current OLDI support in
tidss_dispc.c also works on the principle that the OLDI output can only
be served by one, and only one, DSS video-port. This isn't the case in
the AM62Px SoC, where there are 2 DSS controllers present that share the
OLDI TXes.
Having their own devicetree and their own bridge entity will help
support the various display modes and sharing possiblilities of the OLDI
hardware.
For all these reasons, add support for the OLDI TXes as DRM bridges.
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: Aradhya Bhatia <aradhya.bhatia@linux.dev>
Tested-by: Michael Walle <mwalle@kernel.org> # on am67a
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://lore.kernel.org/r/20250528122544.817829-5-aradhya.bhatia@linux.dev
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
The dss dt schema and the tidss driver have kept the single-link OLDI in
AM65x integrated with the parent video-port (VP) from DSS (as the OLDI
configuration happens from the source VP only).
To help configure the dual-lvds modes that the OLDI has to offer in
devices AM62x and later, a new OLDI bridge driver will be introduced.
Mark the existing OLDI code separately by renaming all the current OLDI
identifiers with the 'AM65X_' prefix in tidss driver, to help
distinguish from the upcoming OLDI bridge driver.
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Aradhya Bhatia <aradhya.bhatia@linux.dev>
Link: https://lore.kernel.org/r/20250528122544.817829-4-aradhya.bhatia@linux.dev
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Create a new unordered workqueue to be used by the display code
instead of relying on the i915 one. Then move all the unordered works
used in the display code to use this new queue.
Since this is an unordered workqueue, by definition there can't be any
order dependency with non-display works, so no extra care is needed
in regard to that.
This is part of the effort to isolate the display code from i915.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250620091632.1256135-1-luciano.coelho@intel.com
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
