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path: root/drivers/gpu/drm/vc4/vc4_plane.c
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Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_plane.c')
-rw-r--r--drivers/gpu/drm/vc4/vc4_plane.c42
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 887f3ca..0addbad 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -29,6 +29,14 @@ struct vc4_plane_state {
u32 *dlist;
u32 dlist_size; /* Number of dwords in allocated for the display list */
u32 dlist_count; /* Number of used dwords in the display list. */
+
+ /* Offset in the dlist to pointer word 0. */
+ u32 pw0_offset;
+
+ /* Offset where the plane's dlist was last stored in the
+ hardware at vc4_crtc_atomic_flush() time.
+ */
+ u32 *hw_dlist;
};
static inline struct vc4_plane_state *
@@ -207,6 +215,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
+ vc4_state->pw0_offset = vc4_state->dlist_count;
+
/* Pointer Word 0: RGB / Y Pointer */
vc4_dlist_write(vc4_state, bo->paddr + offset);
@@ -258,6 +268,8 @@ u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist)
struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
int i;
+ vc4_state->hw_dlist = dlist;
+
/* Can't memcpy_toio() because it needs to be 32-bit writes. */
for (i = 0; i < vc4_state->dlist_count; i++)
writel(vc4_state->dlist[i], &dlist[i]);
@@ -272,6 +284,34 @@ u32 vc4_plane_dlist_size(struct drm_plane_state *state)
return vc4_state->dlist_count;
}
+/* Updates the plane to immediately (well, once the FIFO needs
+ * refilling) scan out from at a new framebuffer.
+ */
+void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
+{
+ struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
+ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
+ uint32_t addr;
+
+ /* We're skipping the address adjustment for negative origin,
+ * because this is only called on the primary plane.
+ */
+ WARN_ON_ONCE(plane->state->crtc_x < 0 || plane->state->crtc_y < 0);
+ addr = bo->paddr + fb->offsets[0];
+
+ /* Write the new address into the hardware immediately. The
+ * scanout will start from this address as soon as the FIFO
+ * needs to refill with pixels.
+ */
+ writel(addr, &vc4_state->hw_dlist[vc4_state->pw0_offset]);
+
+ /* Also update the CPU-side dlist copy, so that any later
+ * atomic updates that don't do a new modeset on our plane
+ * also use our updated address.
+ */
+ vc4_state->dlist[vc4_state->pw0_offset] = addr;
+}
+
static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
.prepare_fb = NULL,
.cleanup_fb = NULL,
@@ -317,7 +357,7 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev,
ret = drm_universal_plane_init(dev, plane, 0xff,
&vc4_plane_funcs,
formats, ARRAY_SIZE(formats),
- type);
+ type, NULL);
drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
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