Create a new private state object for the DU groups, and move the initialisation of a group object to a new function rcar_du_group_init().
Reviewed-by: Ulrich Hecht uli+renesas@fpond.eu Signed-off-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com --- Changes since v3: - Rebase to v5.11 - Fix pointer passing for drm_atomic_private_obj_init() - Fix checkpatch.pl --strict warning about if (state == NULL)
Changes since v2:
- Call mutex_destroy() when cleaning up the group - Include mutex.h and slab.h - Squash "drm: rcar-du: Add rcar_du_get_{old,new}_group_state()" --- drivers/gpu/drm/rcar-du/rcar_du_group.c | 144 ++++++++++++++++++++++++ drivers/gpu/drm/rcar-du/rcar_du_group.h | 29 +++++ drivers/gpu/drm/rcar-du/rcar_du_kms.c | 27 +---- 3 files changed, 177 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c index 88a783ceb3e9..7c13def703b7 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c @@ -25,6 +25,11 @@
#include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_state_helper.h> +#include <drm/drm_device.h>
#include "rcar_du_drv.h" #include "rcar_du_group.h" @@ -361,3 +366,142 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp)
return rcar_du_set_dpad0_vsp1_routing(rgrp->dev); } + +/* ----------------------------------------------------------------------------- + * Group State Handling + */ + +static struct drm_private_state * +rcar_du_group_atomic_duplicate_state(struct drm_private_obj *obj) +{ + struct rcar_du_group_state *state; + + if (WARN_ON(!obj->state)) + return NULL; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + + __drm_atomic_helper_private_obj_duplicate_state(obj, &state->state); + + return &state->state; +} + +static void rcar_du_group_atomic_destroy_state(struct drm_private_obj *obj, + struct drm_private_state *state) +{ + kfree(to_rcar_group_state(state)); +} + +static const struct drm_private_state_funcs rcar_du_group_state_funcs = { + .atomic_duplicate_state = rcar_du_group_atomic_duplicate_state, + .atomic_destroy_state = rcar_du_group_atomic_destroy_state, +}; + +/** + * rcar_du_get_old_group_state - get old group state, if it exists + * @state: global atomic state object + * @rgrp: group to grab + * + * This function returns the old group state for the given group, or + * NULL if the group is not part of the global atomic state. + */ +struct rcar_du_group_state * +rcar_du_get_old_group_state(struct drm_atomic_state *state, + struct rcar_du_group *rgrp) +{ + struct drm_private_obj *obj = &rgrp->private; + struct drm_private_state *pstate; + unsigned int i; + + for (i = 0; i < state->num_private_objs; i++) { + if (obj == state->private_objs[i].ptr) { + pstate = state->private_objs[i].old_state; + return to_rcar_group_state(pstate); + } + } + + return NULL; +} + +/** + * rcar_du_get_new_group_state - get new group state, if it exists + * @state: global atomic state object + * @rgrp: group to grab + * + * This function returns the new group state for the given group, or + * NULL if the group is not part of the global atomic state. + */ +struct rcar_du_group_state * +rcar_du_get_new_group_state(struct drm_atomic_state *state, + struct rcar_du_group *rgrp) +{ + struct drm_private_obj *obj = &rgrp->private; + struct drm_private_state *pstate; + unsigned int i; + + for (i = 0; i < state->num_private_objs; i++) { + if (obj == state->private_objs[i].ptr) { + pstate = state->private_objs[i].new_state; + return to_rcar_group_state(pstate); + } + } + + return NULL; +} + +/* ----------------------------------------------------------------------------- + * Init and Cleanup + */ + +/* + * rcar_du_group_init - Initialise and reset a group object + * + * Return 0 in case of success or a negative error code otherwise. + */ +int rcar_du_group_init(struct rcar_du_device *rcdu, struct rcar_du_group *rgrp, + unsigned int index) +{ + static const unsigned int mmio_offsets[] = { + DU0_REG_OFFSET, DU2_REG_OFFSET + }; + + struct rcar_du_group_state *state; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return -ENOMEM; + + drm_atomic_private_obj_init(&rcdu->ddev, &rgrp->private, &state->state, + &rcar_du_group_state_funcs); + + mutex_init(&rgrp->lock); + + rgrp->dev = rcdu; + rgrp->mmio_offset = mmio_offsets[index]; + rgrp->index = index; + /* Extract the channel mask for this group only. */ + rgrp->channels_mask = (rcdu->info->channels_mask >> (2 * index)) + & GENMASK(1, 0); + rgrp->num_crtcs = hweight8(rgrp->channels_mask); + + /* + * If we have more than one CRTC in this group pre-associate + * the low-order planes with CRTC 0 and the high-order planes + * with CRTC 1 to minimize flicker occurring when the + * association is changed. + */ + rgrp->dptsr_planes = rgrp->num_crtcs > 1 + ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0) + : 0; + + return 0; +} + +void rcar_du_group_cleanup(struct rcar_du_group *rgrp) +{ + mutex_destroy(&rgrp->lock); + + drm_atomic_private_obj_fini(&rgrp->private); +} diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h index e9906609c635..f0b94eb77746 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h @@ -12,12 +12,15 @@
#include <linux/mutex.h>
+#include <drm/drm_atomic.h> + #include "rcar_du_plane.h"
struct rcar_du_device;
/* * struct rcar_du_group - CRTCs and planes group + * @private: The base drm private object * @dev: the DU device * @mmio_offset: registers offset in the device memory map * @index: group index @@ -33,6 +36,8 @@ struct rcar_du_device; * @need_restart: the group needs to be restarted due to a configuration change */ struct rcar_du_group { + struct drm_private_obj private; + struct rcar_du_device *dev; unsigned int mmio_offset; unsigned int index; @@ -51,6 +56,19 @@ struct rcar_du_group { bool need_restart; };
+#define to_rcar_group(s) container_of(s, struct rcar_du_group, private) + +/** + * struct rcar_du_group_state - Driver-specific group state + * @state: base DRM private state + */ +struct rcar_du_group_state { + struct drm_private_state state; +}; + +#define to_rcar_group_state(s) \ + container_of(s, struct rcar_du_group_state, state) + u32 rcar_du_group_read(struct rcar_du_group *rgrp, u32 reg); void rcar_du_group_write(struct rcar_du_group *rgrp, u32 reg, u32 data);
@@ -62,4 +80,15 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp);
int rcar_du_set_dpad0_vsp1_routing(struct rcar_du_device *rcdu);
+struct rcar_du_group_state * +rcar_du_get_old_group_state(struct drm_atomic_state *state, + struct rcar_du_group *rgrp); +struct rcar_du_group_state * +rcar_du_get_new_group_state(struct drm_atomic_state *state, + struct rcar_du_group *rgrp); + +int rcar_du_group_init(struct rcar_du_device *rcdu, struct rcar_du_group *rgrp, + unsigned int index); +void rcar_du_group_cleanup(struct rcar_du_group *rgrp); + #endif /* __RCAR_DU_GROUP_H__ */ diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index 732aac342dab..d3069fb284fb 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c @@ -26,6 +26,7 @@ #include "rcar_du_crtc.h" #include "rcar_du_drv.h" #include "rcar_du_encoder.h" +#include "rcar_du_group.h" #include "rcar_du_kms.h" #include "rcar_du_regs.h" #include "rcar_du_vsp.h" @@ -765,10 +766,6 @@ static void rcar_du_modeset_cleanup(struct drm_device *dev, void *res)
int rcar_du_modeset_init(struct rcar_du_device *rcdu) { - static const unsigned int mmio_offsets[] = { - DU0_REG_OFFSET, DU2_REG_OFFSET - }; - struct drm_device *dev = &rcdu->ddev; struct drm_encoder *encoder; struct rcar_du_group *rgrp; @@ -821,25 +818,9 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
/* Initialize the groups. */ for_each_rcdu_group(rcdu, rgrp, i) { - mutex_init(&rgrp->lock); - - rgrp->dev = rcdu; - rgrp->mmio_offset = mmio_offsets[i]; - rgrp->index = i; - /* Extract the channel mask for this group only. */ - rgrp->channels_mask = (rcdu->info->channels_mask >> (2 * i)) - & GENMASK(1, 0); - rgrp->num_crtcs = hweight8(rgrp->channels_mask); - - /* - * If we have more than one CRTCs in this group pre-associate - * the low-order planes with CRTC 0 and the high-order planes - * with CRTC 1 to minimize flicker occurring when the - * association is changed. - */ - rgrp->dptsr_planes = rgrp->num_crtcs > 1 - ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0) - : 0; + ret = rcar_du_group_init(rcdu, rgrp, i); + if (ret < 0) + return ret;
if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) { ret = rcar_du_planes_init(rgrp);