[PATCH v4] drm/rockchip: update cursors asynchronously through atomic.

From: Helen Koike
Date: Wed Dec 05 2018 - 07:33:28 EST

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From: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>

Add support to async updates of cursors by using the new atomic
interface for that.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
[updated for upstream]
Signed-off-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>

---
Hello,

This is the forth version of the async-plane update suport to the
Rockchip driver.

I tested running igt kms_cursor_legacy and kms_atomic tests using a 96Boards Ficus.

Note that before the patch, the following igt tests failed:

basic-flip-before-cursor-atomic
basic-flip-before-cursor-legacy
cursor-vs-flip-atomic
cursor-vs-flip-legacy
cursor-vs-flip-toggle
flip-vs-cursor-atomic
flip-vs-cursor-busy-crc-atomic
flip-vs-cursor-busy-crc-legacy
flip-vs-cursor-crc-atomic
flip-vs-cursor-crc-legacy
flip-vs-cursor-legacy

Full log: https://people.collabora.com/~koike/results-4.20/html/

Now with only the following fails:
cursor-vs-flip-legacy
flip-vs-cursor-busy-crc-atomic
flip-vs-cursor-busy-crc-legacy
flip-vs-cursor-crc-atomic
flip-vs-cursor-crc-legacy

Full log: https://people.collabora.com/~koike/results-4.20-async/html/

Thanks
Helen

Changes in v4:
- Removed vop_crtc_atomic_commit_flush
- Call drm_atomic_set_fb_for_plane() only when framebuffers are
different
- Removed unecessary ret variable from vop_plane_atomic_async_check
- async_update: duplicate plane state for an atomic swap
- async_update: prevent releasing buffer current being scaned out by the
hw by getting a reference and adding a worker

Changes in v3:
- Rebased on top of drm-misc
- Fix missing include in rockchip_drm_vop.c
- New function vop_crtc_atomic_commit_flush

Changes in v2:
- v2: https://patchwork.freedesktop.org/patch/254180/
- Change the framebuffer as well to cover jumpy cursor when hovering
text boxes or hyperlink. (Tomasz)
- Use the PSR inhibit mechanism when accessing VOP hardware instead of
PSR flushing (Tomasz)

Changes in v1:
- Rebased on top of drm-misc
- In async_check call drm_atomic_helper_check_plane_state to check that
the desired plane is valid and update various bits of derived state
(clipped coordinates etc.)
- In async_check allow to configure new scaling in the fast path.
- In async_update force to flush all registered PSR encoders.
- In async_update call atomic_update directly.
- In async_update call vop_cfg_done needed to set the vop registers and take effect.

drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 36 ----------
drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 37 +++++++++++
drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 3 +
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 74 +++++++++++++++++++++
4 files changed, 114 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index ea18cb2a76c0..08bec50d9c5d 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -127,42 +127,6 @@ rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
return ERR_PTR(ret);
}

-static void
-rockchip_drm_psr_inhibit_get_state(struct drm_atomic_state *state)
-{
- struct drm_crtc *crtc;
- struct drm_crtc_state *crtc_state;
- struct drm_encoder *encoder;
- u32 encoder_mask = 0;
- int i;
-
- for_each_old_crtc_in_state(state, crtc, crtc_state, i) {
- encoder_mask |= crtc_state->encoder_mask;
- encoder_mask |= crtc->state->encoder_mask;
- }
-
- drm_for_each_encoder_mask(encoder, state->dev, encoder_mask)
- rockchip_drm_psr_inhibit_get(encoder);
-}
-
-static void
-rockchip_drm_psr_inhibit_put_state(struct drm_atomic_state *state)
-{
- struct drm_crtc *crtc;
- struct drm_crtc_state *crtc_state;
- struct drm_encoder *encoder;
- u32 encoder_mask = 0;
- int i;
-
- for_each_old_crtc_in_state(state, crtc, crtc_state, i) {
- encoder_mask |= crtc_state->encoder_mask;
- encoder_mask |= crtc->state->encoder_mask;
- }
-
- drm_for_each_encoder_mask(encoder, state->dev, encoder_mask)
- rockchip_drm_psr_inhibit_put(encoder);
-}
-
static void
rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)
{
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
index 01ff3c858875..22a70ab6e214 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
@@ -13,6 +13,7 @@
*/

#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
#include <drm/drm_crtc_helper.h>

#include "rockchip_drm_drv.h"
@@ -109,6 +110,42 @@ int rockchip_drm_psr_inhibit_put(struct drm_encoder *encoder)
}
EXPORT_SYMBOL(rockchip_drm_psr_inhibit_put);

+void rockchip_drm_psr_inhibit_get_state(struct drm_atomic_state *state)
+{
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *crtc_state;
+ struct drm_encoder *encoder;
+ u32 encoder_mask = 0;
+ int i;
+
+ for_each_old_crtc_in_state(state, crtc, crtc_state, i) {
+ encoder_mask |= crtc_state->encoder_mask;
+ encoder_mask |= crtc->state->encoder_mask;
+ }
+
+ drm_for_each_encoder_mask(encoder, state->dev, encoder_mask)
+ rockchip_drm_psr_inhibit_get(encoder);
+}
+EXPORT_SYMBOL(rockchip_drm_psr_inhibit_get_state);
+
+void rockchip_drm_psr_inhibit_put_state(struct drm_atomic_state *state)
+{
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *crtc_state;
+ struct drm_encoder *encoder;
+ u32 encoder_mask = 0;
+ int i;
+
+ for_each_old_crtc_in_state(state, crtc, crtc_state, i) {
+ encoder_mask |= crtc_state->encoder_mask;
+ encoder_mask |= crtc->state->encoder_mask;
+ }
+
+ drm_for_each_encoder_mask(encoder, state->dev, encoder_mask)
+ rockchip_drm_psr_inhibit_put(encoder);
+}
+EXPORT_SYMBOL(rockchip_drm_psr_inhibit_put_state);
+
/**
* rockchip_drm_psr_inhibit_get - acquire PSR inhibit on given encoder
* @encoder: encoder to obtain the PSR encoder
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
index 860c62494496..25350ba3237b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
@@ -20,6 +20,9 @@ void rockchip_drm_psr_flush_all(struct drm_device *dev);
int rockchip_drm_psr_inhibit_put(struct drm_encoder *encoder);
int rockchip_drm_psr_inhibit_get(struct drm_encoder *encoder);

+void rockchip_drm_psr_inhibit_get_state(struct drm_atomic_state *state);
+void rockchip_drm_psr_inhibit_put_state(struct drm_atomic_state *state);
+
int rockchip_drm_psr_register(struct drm_encoder *encoder,
int (*psr_set)(struct drm_encoder *, bool enable));
void rockchip_drm_psr_unregister(struct drm_encoder *encoder);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index fb70fb486fbf..e5fb21e3ccf8 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -15,6 +15,7 @@
#include <drm/drm.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_uapi.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_flip_work.h>
@@ -819,10 +820,83 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
spin_unlock(&vop->reg_lock);
}

+static int vop_plane_atomic_async_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct vop_win *vop_win = to_vop_win(plane);
+ const struct vop_win_data *win = vop_win->data;
+ int min_scale = win->phy->scl ? FRAC_16_16(1, 8) :
+ DRM_PLANE_HELPER_NO_SCALING;
+ int max_scale = win->phy->scl ? FRAC_16_16(8, 1) :
+ DRM_PLANE_HELPER_NO_SCALING;
+ struct drm_crtc_state *crtc_state;
+
+ if (plane != state->crtc->cursor)
+ return -EINVAL;
+
+ if (!plane->state)
+ return -EINVAL;
+
+ if (!plane->state->fb)
+ return -EINVAL;
+
+ if (state->state)
+ crtc_state = drm_atomic_get_existing_crtc_state(state->state,
+ state->crtc);
+ else /* Special case for asynchronous cursor updates. */
+ crtc_state = plane->crtc->state;
+
+ return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
+ min_scale, max_scale,
+ true, true);
+}
+
+static void vop_plane_atomic_async_update(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
+{
+ struct vop *vop = to_vop(plane->state->crtc);
+ struct drm_plane_state *plane_state;
+
+ plane_state = plane->funcs->atomic_duplicate_state(plane);
+ plane_state->crtc_x = new_state->crtc_x;
+ plane_state->crtc_y = new_state->crtc_y;
+ plane_state->crtc_h = new_state->crtc_h;
+ plane_state->crtc_w = new_state->crtc_w;
+ plane_state->src_x = new_state->src_x;
+ plane_state->src_y = new_state->src_y;
+ plane_state->src_h = new_state->src_h;
+ plane_state->src_w = new_state->src_w;
+
+ if (plane_state->fb != new_state->fb)
+ drm_atomic_set_fb_for_plane(plane_state, new_state->fb);
+
+ swap(plane_state, plane->state);
+
+ if (plane->state->fb && plane->state->fb != new_state->fb) {
+ drm_framebuffer_get(plane->state->fb);
+ WARN_ON(drm_crtc_vblank_get(plane->state->crtc) != 0);
+ drm_flip_work_queue(&vop->fb_unref_work, plane->state->fb);
+ set_bit(VOP_PENDING_FB_UNREF, &vop->pending);
+ }
+
+ if (vop->is_enabled) {
+ rockchip_drm_psr_inhibit_get_state(new_state->state);
+ vop_plane_atomic_update(plane, plane->state);
+ spin_lock(&vop->reg_lock);
+ vop_cfg_done(vop);
+ spin_unlock(&vop->reg_lock);
+ rockchip_drm_psr_inhibit_put_state(new_state->state);
+ }
+
+ plane->funcs->atomic_destroy_state(plane, plane_state);
+}
+
static const struct drm_plane_helper_funcs plane_helper_funcs = {
.atomic_check = vop_plane_atomic_check,
.atomic_update = vop_plane_atomic_update,
.atomic_disable = vop_plane_atomic_disable,
+ .atomic_async_check = vop_plane_atomic_async_check,
+ .atomic_async_update = vop_plane_atomic_async_update,
};

static const struct drm_plane_funcs vop_plane_funcs = {
--
2.19.1

Next message: Thierry Reding: "Re: [PATCH] dma-mapping: fix lack of DMA address assignment in generic remap allocator"
Previous message: David Hildenbrand: "[PATCH RFC 7/7] mm: better document PG_reserved"
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