99 lines
3.4 KiB
Diff
99 lines
3.4 KiB
Diff
From 81072e19a85bfa3f80c23acdff6156522d945efa Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Tue, 11 Feb 2020 16:55:02 +0000
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Subject: [PATCH] drm/vc4: plane: Improve LBM usage
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LBM allocations were always taking the worst case sizing of
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max(src_width, dst_width) * 16. This is significantly over
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the required sizing, and stops us rendering multiple 4k images
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to the screen.
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Add some of the additional constraints to more accurately
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describe the LBM requirements.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_plane.c | 31 ++++++++++++++++++++-----------
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1 file changed, 20 insertions(+), 11 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_plane.c
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+++ b/drivers/gpu/drm/vc4/vc4_plane.c
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@@ -142,9 +142,10 @@ static const struct hvs_format *vc4_get_
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return NULL;
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}
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-static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
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+static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst,
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+ bool chroma_vrep)
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{
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- if (dst == src)
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+ if (dst == src && !chroma_vrep)
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return VC4_SCALING_NONE;
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if (3 * dst >= 2 * src)
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return VC4_SCALING_PPF;
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@@ -373,9 +374,11 @@ static int vc4_plane_setup_clipping_and_
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return ret;
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vc4_state->x_scaling[0] = vc4_get_scaling_mode(vc4_state->src_w[0],
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- vc4_state->crtc_w);
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+ vc4_state->crtc_w,
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+ false);
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vc4_state->y_scaling[0] = vc4_get_scaling_mode(vc4_state->src_h[0],
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- vc4_state->crtc_h);
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+ vc4_state->crtc_h,
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+ false);
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vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
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vc4_state->y_scaling[0] == VC4_SCALING_NONE);
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@@ -388,10 +391,12 @@ static int vc4_plane_setup_clipping_and_
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vc4_state->x_scaling[1] =
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vc4_get_scaling_mode(vc4_state->src_w[1],
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- vc4_state->crtc_w);
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+ vc4_state->crtc_w,
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+ v_subsample == 2);
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vc4_state->y_scaling[1] =
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vc4_get_scaling_mode(vc4_state->src_h[1],
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- vc4_state->crtc_h);
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+ vc4_state->crtc_h,
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+ v_subsample == 2);
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/* YUV conversion requires that horizontal scaling be enabled
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* on the UV plane even if vc4_get_scaling_mode() returned
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@@ -441,10 +446,7 @@ static void vc4_write_ppf(struct vc4_pla
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static u32 vc4_lbm_size(struct drm_plane_state *state)
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{
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struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
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- /* This is the worst case number. One of the two sizes will
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- * be used depending on the scaling configuration.
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- */
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- u32 pix_per_line = max(vc4_state->src_w[0], (u32)vc4_state->crtc_w);
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+ u32 pix_per_line;
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u32 lbm;
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/* LBM is not needed when there's no vertical scaling. */
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@@ -452,6 +454,11 @@ static u32 vc4_lbm_size(struct drm_plane
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vc4_state->y_scaling[1] == VC4_SCALING_NONE)
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return 0;
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+ if (vc4_state->x_scaling[0] == VC4_SCALING_TPZ)
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+ pix_per_line = vc4_state->crtc_w;
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+ else
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+ pix_per_line = vc4_state->src_w[0];
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+
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if (!vc4_state->is_yuv) {
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if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ)
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lbm = pix_per_line * 8;
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@@ -587,7 +594,9 @@ static int vc4_plane_allocate_lbm(struct
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spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
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ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
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&vc4_state->lbm,
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- lbm_size, 32, 0, 0);
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+ lbm_size,
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+ vc4->hvs->hvs5 ? 64 : 32,
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+ 0, 0);
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spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
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if (ret)
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