Am 19.02.21 um 13:00 schrieb Maxime Ripard:
Many drivers reference the plane->state pointer in order to get the
current plane state in their atomic_check hook, which would be the old
plane state in the global atomic state since _swap_state hasn't happened
when atomic_check is run.
Use the drm_atomic_get_old_plane_state helper to get that state to make
it more obvious.
This was made using the coccinelle script below:
@ plane_atomic_func @
identifier helpers;
identifier func;
@@
static struct drm_plane_helper_funcs helpers = {
...,
.atomic_check = func,
...,
};
@ replaces_old_state @
identifier plane_atomic_func.func;
identifier plane, state, plane_state;
@@
func(struct drm_plane *plane, struct drm_atomic_state *state) {
...
- struct drm_plane_state *plane_state = plane->state;
+ struct drm_plane_state *plane_state = drm_atomic_get_old_plane_state(state, plane);
...
}
@@
identifier plane_atomic_func.func;
identifier plane, state, plane_state;
@@
func(struct drm_plane *plane, struct drm_atomic_state *state) {
struct drm_plane_state *plane_state = drm_atomic_get_old_plane_state(state, plane);
<...
- plane->state
+ plane_state
...>
}
@ adds_old_state @
identifier plane_atomic_func.func;
identifier plane, state;
@@
func(struct drm_plane *plane, struct drm_atomic_state *state) {
+ struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
<...
- plane->state
+ old_plane_state
...>
}
@ include depends on adds_old_state || replaces_old_state @
@@
#include <drm/drm_atomic.h>
@ no_include depends on !include && (adds_old_state || replaces_old_state) @
@@
+ #include <drm/drm_atomic.h>
#include <drm/...>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>However, I find 'old plane state' somewhat confusing in this context, because it's actually the current plane state. Would it make sense to use drm_atomic_get_existing_plane_state() instead?
Best regards Thomas
--- Changes from v2: - s/.../<.../ in the coccinelle script as suggested by Ville --- drivers/gpu/drm/imx/ipuv3-plane.c | 3 ++- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 16 +++++++++------- drivers/gpu/drm/ingenic/ingenic-ipu.c | 8 +++++--- drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c | 4 +++- drivers/gpu/drm/tilcdc/tilcdc_plane.c | 3 ++- 5 files changed, 21 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c index b5f6123850bb..6484592e3f86 100644 --- a/drivers/gpu/drm/imx/ipuv3-plane.c +++ b/drivers/gpu/drm/imx/ipuv3-plane.c @@ -341,7 +341,8 @@ static int ipu_plane_atomic_check(struct drm_plane *plane, { struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane); - struct drm_plane_state *old_state = plane->state; + struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, + plane); struct drm_crtc_state *crtc_state; struct device *dev = plane->dev->dev; struct drm_framebuffer *fb = new_state->fb; diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index e6d7d0a04ddb..c022d9f1e737 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -361,11 +361,13 @@ static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc, static int ingenic_drm_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state) { + struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, + plane); struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); struct ingenic_drm *priv = drm_device_get_priv(plane->dev); struct drm_crtc_state *crtc_state; - struct drm_crtc *crtc = new_plane_state->crtc ?: plane->state->crtc; + struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc; int ret;if (!crtc)@@ -399,12 +401,12 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane, * its position, size or depth. */ if (priv->soc_info->has_osd && - (!plane->state->fb || !new_plane_state->fb || - plane->state->crtc_x != new_plane_state->crtc_x || - plane->state->crtc_y != new_plane_state->crtc_y || - plane->state->crtc_w != new_plane_state->crtc_w || - plane->state->crtc_h != new_plane_state->crtc_h || - plane->state->fb->format->format != new_plane_state->fb->format->format)) + (!old_plane_state->fb || !new_plane_state->fb || + old_plane_state->crtc_x != new_plane_state->crtc_x || + old_plane_state->crtc_y != new_plane_state->crtc_y || + old_plane_state->crtc_w != new_plane_state->crtc_w || + old_plane_state->crtc_h != new_plane_state->crtc_h || + old_plane_state->fb->format->format != new_plane_state->fb->format->format)) crtc_state->mode_changed = true;return 0;diff --git a/drivers/gpu/drm/ingenic/ingenic-ipu.c b/drivers/gpu/drm/ingenic/ingenic-ipu.c index 1e1b0fe095bd..3d072b25e1c4 100644 --- a/drivers/gpu/drm/ingenic/ingenic-ipu.c +++ b/drivers/gpu/drm/ingenic/ingenic-ipu.c @@ -516,11 +516,13 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane, static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state) { + struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, + plane); struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); unsigned int num_w, denom_w, num_h, denom_h, xres, yres, max_w, max_h; struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane); - struct drm_crtc *crtc = new_plane_state->crtc ?: plane->state->crtc; + struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc; struct drm_crtc_state *crtc_state;if (!crtc)@@ -531,7 +533,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane, return -EINVAL;/* Request a full modeset if we are enabling or disabling the IPU. */- if (!plane->state->crtc ^ !new_plane_state->crtc) + if (!old_plane_state->crtc ^ !new_plane_state->crtc) crtc_state->mode_changed = true;if (!new_plane_state->crtc ||@@ -552,7 +554,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane, if (((new_plane_state->src_w >> 16) & 1) || (new_plane_state->crtc_w & 1)) return -EINVAL;- if (!osd_changed(new_plane_state, plane->state))+ if (!osd_changed(new_plane_state, old_plane_state)) return 0;crtc_state->mode_changed = true;diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c index 4aac6217a5ad..6ce6ce09fecc 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c @@ -406,12 +406,14 @@ static int mdp5_plane_atomic_check_with_state(struct drm_crtc_state *crtc_state, static int mdp5_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state) { + struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, + plane); struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); struct drm_crtc *crtc; struct drm_crtc_state *crtc_state;- crtc = new_plane_state->crtc ? new_plane_state->crtc : plane->state->crtc;+ crtc = new_plane_state->crtc ? new_plane_state->crtc : old_plane_state->crtc; if (!crtc) return 0;diff --git a/drivers/gpu/drm/tilcdc/tilcdc_plane.c b/drivers/gpu/drm/tilcdc/tilcdc_plane.cindex ebdd42dcaf82..c86258132432 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_plane.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_plane.c @@ -26,7 +26,8 @@ static int tilcdc_plane_atomic_check(struct drm_plane *plane, struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane); struct drm_crtc_state *crtc_state; - struct drm_plane_state *old_state = plane->state; + struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, + plane); unsigned int pitch;if (!new_state->crtc)
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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