[PATCH 44/59] drm/mediatek: Use drm_atomic_helper_wait_for_fences

Daniel Vetter
2019-06-14T20:37:14Z

If we use the gem fb helper as the prepare_fb hook, plus the
drm_prime.c import helpers now automatically setting obj->resv, we can
use the shared helpers to wait for fences instead of rolling our own.
Note that this relies on mtk setting drm_fb->obj, which is already
done in mtk_drm_framebuffer_init().

Aside: Probably can use the default commit_tail with this again, but I
didn't check for that.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
---
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 12 +---------
drivers/gpu/drm/mediatek/mtk_drm_fb.c | 28 ------------------------
drivers/gpu/drm/mediatek/mtk_drm_fb.h | 1 -
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 2 ++
4 files changed, 3 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index dd8dab562500..2d5caf532431 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -38,22 +38,12 @@ static void mtk_atomic_schedule(struct mtk_drm_private *private,
schedule_work(&private->commit.work);
}

-static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state)
-{
- struct drm_plane *plane;
- struct drm_plane_state *new_plane_state;
- int i;
-
- for_each_new_plane_in_state(state, plane, new_plane_state, i)
- mtk_fb_wait(new_plane_state->fb);
-}
-
static void mtk_atomic_complete(struct mtk_drm_private *private,
struct drm_atomic_state *state)
{
struct drm_device *drm = private->drm;

- mtk_atomic_wait_for_fences(state);
+ drm_atomic_helper_wait_for_fences(drm, state, false);

/*
* Mediatek drm supports runtime PM, so plane registers cannot be
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.c b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
index 4c3ad7de2d3b..396ba497986d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_fb.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
@@ -49,34 +49,6 @@ static struct drm_framebuffer *mtk_drm_framebuffer_init(struct drm_device *dev,
return fb;
}

-/*
- * Wait for any exclusive fence in fb's gem object's reservation object.
- *
- * Returns -ERESTARTSYS if interrupted, else 0.
- */
-int mtk_fb_wait(struct drm_framebuffer *fb)
-{
- struct drm_gem_object *gem;
- struct reservation_object *resv;
- long ret;
-
- if (!fb)
- return 0;
-
- gem = fb->obj[0];
- if (!gem || !gem->dma_buf || !gem->dma_buf->resv)
- return 0;
-
- resv = gem->dma_buf->resv;
- ret = reservation_object_wait_timeout_rcu(resv, false, true,
- MAX_SCHEDULE_TIMEOUT);
- /* MAX_SCHEDULE_TIMEOUT on success, -ERESTARTSYS if interrupted */
- if (WARN_ON(ret < 0))
- return ret;
-
- return 0;
-}
-
struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *cmd)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.h b/drivers/gpu/drm/mediatek/mtk_drm_fb.h
index 6b80c28e33cf..eb64d26001c6 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_fb.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.h
@@ -6,7 +6,6 @@
#ifndef MTK_DRM_FB_H
#define MTK_DRM_FB_H

-int mtk_fb_wait(struct drm_framebuffer *fb);
struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *cmd);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index f2ef83aed6f9..42cc9823eaaa 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -8,6 +8,7 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>

#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
@@ -146,6 +147,7 @@ static void mtk_plane_atomic_disable(struct drm_plane *plane,
}

static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
+ .prepare_fb = drm_gem_fb_prepare_fb,
.atomic_check = mtk_plane_atomic_check,
.atomic_update = mtk_plane_atomic_update,
.atomic_disable = mtk_plane_atomic_disable,
--
2.20.1