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The plane only initializes a pristine state in its reset hook
using drm_atomic_helper_plane_reset(), which is equivalent to what
atomic_create_state expects. Convert to it.
The conversion was done using the following Coccinelle semantic patch:
@@
identifier funcs;
symbol drm_atomic_helper_plane_reset;
symbol drm_atomic_helper_plane_create_state;
@@
struct drm_plane_funcs funcs = {
...,
- .reset = drm_atomic_helper_plane_reset,
+ .atomic_create_state = drm_atomic_helper_plane_create_state,
...,
};
@match_struct_reset@
identifier funcs, reset_func;
@@
struct drm_plane_funcs funcs = {
...,
.reset = reset_func,
...,
};
@reset_uses_helpers depends on match_struct_reset@
identifier match_struct_reset.reset_func;
@@
void reset_func(...)
{
<+...
(
__drm_atomic_helper_plane_reset(...);
|
__drm_gem_reset_shadow_plane(...);
)
...+>
}
@match_struct_destroy@
identifier funcs, destroy_func;
@@
struct drm_plane_funcs funcs = {
...,
.atomic_destroy_state = destroy_func,
...,
};
@script:python renamed_func@
old_name << match_struct_reset.reset_func;
new_name;
@@
if old_name.endswith("_reset"):
coccinelle.new_name = old_name.replace("_reset", "_create_state")
else:
coccinelle.new_name = old_name
@update_struct depends on match_struct_reset && reset_uses_helpers@
identifier match_struct_reset.funcs, match_struct_reset.reset_func;
identifier renamed_func.new_name;
@@
struct drm_plane_funcs funcs = {
...,
- .reset = reset_func,
+ .atomic_create_state = new_name,
...,
};
@drop_destroy depends on update_struct && match_struct_destroy@
identifier match_struct_reset.reset_func;
identifier match_struct_destroy.destroy_func;
identifier container_func;
identifier P;
symbol drm_atomic_helper_plane_destroy_state;
symbol __drm_atomic_helper_plane_destroy_state;
@@
void reset_func(struct drm_plane *P)
{
...
(
- if (P->state) {
- <+...
(
- drm_atomic_helper_plane_destroy_state(P, P->state);
|
- __drm_atomic_helper_plane_destroy_state(P->state);
|
- P->funcs->atomic_destroy_state(P, P->state);
|
- destroy_func(P, P->state);
)
- ...+>
- }
|
- drm_WARN_ON_ONCE(P->dev, P->state);
|
- WARN_ON(P->state);
)
...
(
- kfree(P->state);
|
- kfree(container_func(P->state));
|
// kfree is optional
)
(
- P->state = NULL;
|
// plane->state clearing is optional
)
...
}
@drop_destroy_mtk depends on update_struct@
identifier P;
symbol __drm_atomic_helper_plane_destroy_state;
symbol to_mtk_plane_state;
@@
void mtk_plane_reset(struct drm_plane *P)
{
...
- if (P->state) {
- __drm_atomic_helper_plane_destroy_state(P->state);
- ...
- } else {
...
- }
...
}
@transform_nv50_wndw depends on update_struct@
identifier S;
@@
void nv50_wndw_reset(...)
{
...
- if (WARN_ON(!(S = kzalloc_obj(*S))))
+ S = kzalloc_obj(*S);
+ if (WARN_ON(!S))
return;
...
}
@transform_kzalloc depends on update_struct@
identifier match_struct_reset.reset_func;
identifier P, S;
statement ST;
statement list STL;
@@
void reset_func(struct drm_plane *P)
{
<...
S = kzalloc_obj(*S);
(
- if (S)
- {
- STL
- }
+ if (!S) return;
+
+ STL
|
- if (S) ST
+ if (!S) return;
+
+ ST
)
...>
}
@transform_body depends on update_struct@
identifier match_struct_reset.reset_func;
identifier renamed_func.new_name;
identifier S, P;
expression PS;
@@
- void reset_func(struct drm_plane *P)
+ struct drm_plane_state *new_name(struct drm_plane *P)
{
...
S = kzalloc_obj(*S);
...
(
if (!S) {
...
- return;
+ return ERR_PTR(-ENOMEM);
}
|
if (WARN_ON(!S)) {
...
- return;
+ return ERR_PTR(-ENOMEM);
}
|
if (S == NULL) {
...
- return;
+ return ERR_PTR(-ENOMEM);
}
)
...
(
- __drm_atomic_helper_plane_reset(P, PS);
+ __drm_atomic_helper_plane_state_init(PS, P);
|
- __drm_gem_reset_shadow_plane(P, PS);
+ __drm_gem_shadow_plane_state_init(P, PS);
)
...
}
@update_early_return depends on update_struct@
identifier match_struct_reset.reset_func;
identifier renamed_func.new_name;
identifier P;
expression PS;
@@
struct drm_plane_state *new_name(struct drm_plane *P)
{
<+...
- return;
+ return ERR_PTR(-EINVAL);
...+>
}
@update_return_plane depends on update_struct@
identifier match_struct_reset.reset_func;
identifier renamed_func.new_name;
identifier P;
expression PS;
@@
struct drm_plane_state *new_name(struct drm_plane *P)
{
...
__drm_atomic_helper_plane_state_init(PS, P);
...
+
+ return PS;
}
@update_return_shadow depends on update_struct@
identifier renamed_func.new_name;
identifier P;
expression PS;
@@
struct drm_plane_state *new_name(struct drm_plane *P)
{
...
__drm_gem_shadow_plane_state_init(P, PS);
...
+
+ return &PS->base;
}
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260908-drm-no-more-plane-reset-v4-10-a31b3fcfc989@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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The KMS framework uses two slightly different definitions for the state
concept. For a given object (plane, CRTC, encoder, etc., so
drm_$OBJECT_state), the state is the entire state of that object.
However, at the device level, drm_atomic_state refers to a state update
for a limited number of objects.
Thus, drm_atomic_state isn't the entire device state, but only the full
state of some objects in that device. This has been an endless source of
confusion and thus bugs.
We can rename the drm_atomic_state structure to drm_atomic_commit to
make it less confusing.
This patch was created using:
rg -l drm_atomic_state | \
xargs sed -i 's/drm_atomic_state/drm_atomic_commit/g; s/drm_atomic_commit_helper/drm_atomic_state_helper/g'
mv drivers/gpu/drm/tests/drm_atomic_state_test.c drivers/gpu/drm/tests/drm_atomic_commit_test.c
Acked-by: Simona Vetter <simona.vetter@ffwll.ch>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260427-drm-drm-atomic-update-v4-1-c0e713bfdf25@kernel.org
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The logicvc atomic_check implementation uses the deprecated
drm_atomic_get_existing_crtc_state() helper.
This hook is called as part of the global atomic_check, thus before the
states are swapped. The existing state thus points to the new state, and
we can use drm_atomic_get_new_crtc_state() instead.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://lore.kernel.org/r/20250930-drm-no-more-existing-state-v5-22-eeb9e1287907@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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Rename "FB CMA" helpers to "FB DMA" helpers - considering the hierarchy
of APIs (mm/cma -> dma -> fb dma) calling them "FB DMA" seems to be
more applicable.
Besides that, commit e57924d4ae80 ("drm/doc: Task to rename CMA helpers")
requests to rename the CMA helpers and implies that people seem to be
confused about the naming.
In order to do this renaming the following script was used:
```
#!/bin/bash
DIRS="drivers/gpu include/drm Documentation/gpu"
REGEX_SYM_UPPER="[0-9A-Z_\-]"
REGEX_SYM_LOWER="[0-9a-z_\-]"
REGEX_GREP_UPPER="(${REGEX_SYM_UPPER}*)(FB)_CMA_(${REGEX_SYM_UPPER}*)"
REGEX_GREP_LOWER="(${REGEX_SYM_LOWER}*)(fb)_cma_(${REGEX_SYM_LOWER}*)"
REGEX_SED_UPPER="s/${REGEX_GREP_UPPER}/\1\2_DMA_\3/g"
REGEX_SED_LOWER="s/${REGEX_GREP_LOWER}/\1\2_dma_\3/g"
# Find all upper case 'CMA' symbols and replace them with 'DMA'.
for ff in $(grep -REHl "${REGEX_GREP_UPPER}" $DIRS)
do
sed -i -E "$REGEX_SED_UPPER" $ff
done
# Find all lower case 'cma' symbols and replace them with 'dma'.
for ff in $(grep -REHl "${REGEX_GREP_LOWER}" $DIRS)
do
sed -i -E "$REGEX_SED_LOWER" $ff
done
# Replace all occurrences of 'CMA' / 'cma' in comments and
# documentation files with 'DMA' / 'dma'.
for ff in $(grep -RiHl " cma " $DIRS)
do
sed -i -E "s/ cma / dma /g" $ff
sed -i -E "s/ CMA / DMA /g" $ff
done
```
Only a few more manual modifications were needed, e.g. reverting the
following modifications in some DRM Kconfig files
- select CMA if HAVE_DMA_CONTIGUOUS
+ select DMA if HAVE_DMA_CONTIGUOUS
as well as manually picking the occurrences of 'CMA'/'cma' in comments and
documentation which relate to "FB CMA", but not "GEM CMA".
This patch is compile-time tested building a x86_64 kernel with
`make allyesconfig && make drivers/gpu/drm`.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> #drivers/gpu/drm/arm
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220802000405.949236-3-dakr@redhat.com
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Rename DRM_PLANE_HELPER_NO_SCALING to DRM_PLANE_NO_SCALING. The constant
is not really a helper, but rather a characteristic of the plane itself.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220720083058.15371-4-tzimmermann@suse.de
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The macro DRM_PLANE_HELPER_NO_SCALING is only useful with the interfaces
in drm_atomic_helper.h, but defined in drm_plane_helper.h. So half of
DRM includes the latter header file for using this macro. Move the macro
and remove the include statements.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220720083058.15371-3-tzimmermann@suse.de
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The of_node_put() need be called in error path in logicvc_layers_init().
Fixes: efeeaefe9be5 ("drm: Add support for the LogiCVC display controller")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220614112112.1537319-1-yangyingliang@huawei.com
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drivers/gpu/drm/logicvc/logicvc_layer.c:616:2-13: ERROR: probable double put.
Device node iterators put the previous value of the index variable, so an
explicit put causes a double put.
Generated by: scripts/coccinelle/iterators/device_node_continue.cocci
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/alpine.DEB.2.22.394.2206121300120.3447@hadrien
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Return -EINVAL if logicvc_layer_formats_lookup() fails. Don't return
success.
Fixes: efeeaefe9be5 ("drm: Add support for the LogiCVC display controller")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Yqh6VdNiDvJYMOQ+@kili
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drm_crtc.h has no need for drm_blend.h, so don't include it.
Avoids useless rebuilds of the entire universe when
touching drm_blend.h.
Quite a few placs do currently depend on drm_blend.h without
actually including it directly. All of those need to be fixed
up.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220613200317.11305-4-ville.syrjala@linux.intel.com
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
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drm_crtc.h has no need for drm_frambuffer.h, so don't include it.
Avoids useless rebuilds of the entire universe when
touching drm_framebuffer.h.
Quite a few placs do currently depend on drm_framebuffer.h without
actually including it directly. All of those need to be fixed
up.
v2: Fix up msm some more
v2: Deal with ingenic and shmobile as well
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220614095449.29311-1-ville.syrjala@linux.intel.com
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
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Introduces a driver for the LogiCVC display controller, a programmable
logic controller optimized for use in Xilinx Zynq-7000 SoCs and other
Xilinx FPGAs. The controller is mostly configured at logic synthesis
time so only a subset of configuration is left for the driver to
handle.
The following features are implemented and tested:
- LVDS 4-bit interface;
- RGB565 pixel formats;
- Multiple layers and hardware composition;
- Layer-wide alpha mode;
The following features are implemented but untested:
- Other RGB pixel formats;
- Layer framebuffer configuration for version 4;
- Lowest-layer used as background color;
- Per-pixel alpha mode.
The following features are not implemented:
- YUV pixel formats;
- DVI, LVDS 3-bit, ITU656 and camera link interfaces;
- External parallel input for layer;
- Color-keying;
- LUT-based alpha modes.
Additional implementation-specific notes:
- Panels are only enabled after the first page flip to avoid flashing a
white screen.
- Depth used in context of the LogiCVC driver only counts color components
to match the definition of the synthesis parameters.
Support is implemented for both version 3 and 4 of the controller.
With version 3, framebuffers are stored in a dedicated contiguous
memory area, with a base address hardcoded for each layer. This requires
using a dedicated CMA pool registered at the base address and tweaking a
few offset-related registers to try to use any buffer allocated from
the pool. This is done on a best-effort basis to have the hardware cope
with the DRM framebuffer allocation model and there is no guarantee
that each buffer allocated by GEM CMA can be used for any layer.
In particular, buffers allocated below the base address for a layer are
guaranteed not to be configurable for that layer. See the implementation of
logicvc_layer_buffer_find_setup for specifics.
Version 4 allows configuring each buffer address directly, which
guarantees that any buffer can be configured.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220520141555.1429041-2-paul.kocialkowski@bootlin.com
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