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openwrt/target/linux/bcm27xx/patches-6.6/950-0020-vc4-drm-vc4_plane-Keep-fractional-source-coords-insi.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches 
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

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From 1e18d70635d275e4c6a9ac63fa79a461ed50eac2 Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Mon, 14 Mar 2022 17:56:10 +0000
Subject: [PATCH 0020/1085] vc4/drm: vc4_plane: Keep fractional source coords
inside state
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---
drivers/gpu/drm/vc4/vc4_drv.h | 2 +-
drivers/gpu/drm/vc4/vc4_plane.c | 68 ++++++++++++++++-----------------
2 files changed, 34 insertions(+), 36 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -408,7 +408,7 @@ struct vc4_plane_state {
/* Clipped coordinates of the plane on the display. */
int crtc_x, crtc_y, crtc_w, crtc_h;
- /* Clipped area being scanned from in the FB. */
+ /* Clipped area being scanned from in the FB in u16.16 format */
u32 src_x, src_y;
u32 src_w[2], src_h[2];
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -251,9 +251,9 @@ static const struct hvs_format *vc4_get_
static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
{
- if (dst == src)
+ if (dst == src >> 16)
return VC4_SCALING_NONE;
- if (3 * dst >= 2 * src)
+ if (3 * dst >= 2 * (src >> 16))
return VC4_SCALING_PPF;
else
return VC4_SCALING_TPZ;
@@ -462,15 +462,10 @@ static int vc4_plane_setup_clipping_and_
vc4_state->offsets[i] = bo->dma_addr + fb->offsets[i];
}
- /*
- * We don't support subpixel source positioning for scaling,
- * but fractional coordinates can be generated by clipping
- * so just round for now
- */
- vc4_state->src_x = DIV_ROUND_CLOSEST(state->src.x1, 1 << 16);
- vc4_state->src_y = DIV_ROUND_CLOSEST(state->src.y1, 1 << 16);
- vc4_state->src_w[0] = DIV_ROUND_CLOSEST(state->src.x2, 1 << 16) - vc4_state->src_x;
- vc4_state->src_h[0] = DIV_ROUND_CLOSEST(state->src.y2, 1 << 16) - vc4_state->src_y;
+ vc4_state->src_x = state->src.x1;
+ vc4_state->src_y = state->src.y1;
+ vc4_state->src_w[0] = state->src.x2 - vc4_state->src_x;
+ vc4_state->src_h[0] = state->src.y2 - vc4_state->src_y;
vc4_state->crtc_x = state->dst.x1;
vc4_state->crtc_y = state->dst.y1;
@@ -523,7 +518,7 @@ static void vc4_write_tpz(struct vc4_pla
{
u32 scale, recip;
- scale = (1 << 16) * src / dst;
+ scale = src / dst;
/* The specs note that while the reciprocal would be defined
* as (1<<32)/scale, ~0 is close enough.
@@ -569,7 +564,7 @@ static u32 vc4_lbm_size(struct drm_plane
if (vc4_state->x_scaling[0] == VC4_SCALING_TPZ)
pix_per_line = vc4_state->crtc_w;
else
- pix_per_line = vc4_state->src_w[0];
+ pix_per_line = vc4_state->src_w[0] >> 16;
if (!vc4_state->is_yuv) {
if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ)
@@ -660,7 +655,8 @@ static void vc4_plane_calc_load(struct d
for (i = 0; i < fb->format->num_planes; i++) {
/* Even if the bandwidth/plane required for a single frame is
*
- * vc4_state->src_w[i] * vc4_state->src_h[i] * cpp * vrefresh
+ * (vc4_state->src_w[i] >> 16) * (vc4_state->src_h[i] >> 16) *
+ * cpp * vrefresh
*
* when downscaling, we have to read more pixels per line in
* the time frame reserved for a single line, so the bandwidth
@@ -669,11 +665,11 @@ static void vc4_plane_calc_load(struct d
* load by this number. We're likely over-estimating the read
* demand, but that's better than under-estimating it.
*/
- vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i],
+ vscale_factor = DIV_ROUND_UP(vc4_state->src_h[i] >> 16,
vc4_state->crtc_h);
- vc4_state->membus_load += vc4_state->src_w[i] *
- vc4_state->src_h[i] * vscale_factor *
- fb->format->cpp[i];
+ vc4_state->membus_load += (vc4_state->src_w[i] >> 16) *
+ (vc4_state->src_h[i] >> 16) *
+ vscale_factor * fb->format->cpp[i];
vc4_state->hvs_load += vc4_state->crtc_h * vc4_state->crtc_w;
}
@@ -826,7 +822,8 @@ static int vc4_plane_mode_set(struct drm
bool mix_plane_alpha;
bool covers_screen;
u32 scl0, scl1, pitch0;
- u32 tiling, src_y;
+ u32 tiling, src_x, src_y;
+ u32 width, height;
u32 hvs_format = format->hvs;
unsigned int rotation;
int ret, i;
@@ -838,6 +835,9 @@ static int vc4_plane_mode_set(struct drm
if (ret)
return ret;
+ width = vc4_state->src_w[0] >> 16;
+ height = vc4_state->src_h[0] >> 16;
+
/* SCL1 is used for Cb/Cr scaling of planar formats. For RGB
* and 4:4:4, scl1 should be set to scl0 so both channels of
* the scaler do the same thing. For YUV, the Y plane needs
@@ -858,9 +858,11 @@ static int vc4_plane_mode_set(struct drm
DRM_MODE_REFLECT_Y);
/* We must point to the last line when Y reflection is enabled. */
- src_y = vc4_state->src_y;
+ src_y = vc4_state->src_y >> 16;
if (rotation & DRM_MODE_REFLECT_Y)
- src_y += vc4_state->src_h[0] - 1;
+ src_y += height - 1;
+
+ src_x = vc4_state->src_x >> 16;
switch (base_format_mod) {
case DRM_FORMAT_MOD_LINEAR:
@@ -875,7 +877,7 @@ static int vc4_plane_mode_set(struct drm
(i ? v_subsample : 1) *
fb->pitches[i];
- vc4_state->offsets[i] += vc4_state->src_x /
+ vc4_state->offsets[i] += src_x /
(i ? h_subsample : 1) *
fb->format->cpp[i];
}
@@ -898,7 +900,7 @@ static int vc4_plane_mode_set(struct drm
* pitch * tile_h == tile_size * tiles_per_row
*/
u32 tiles_w = fb->pitches[0] >> (tile_size_shift - tile_h_shift);
- u32 tiles_l = vc4_state->src_x >> tile_w_shift;
+ u32 tiles_l = src_x >> tile_w_shift;
u32 tiles_r = tiles_w - tiles_l;
u32 tiles_t = src_y >> tile_h_shift;
/* Intra-tile offsets, which modify the base address (the
@@ -908,7 +910,7 @@ static int vc4_plane_mode_set(struct drm
u32 tile_y = (src_y >> 4) & 1;
u32 subtile_y = (src_y >> 2) & 3;
u32 utile_y = src_y & 3;
- u32 x_off = vc4_state->src_x & tile_w_mask;
+ u32 x_off = src_x & tile_w_mask;
u32 y_off = src_y & tile_h_mask;
/* When Y reflection is requested we must set the
@@ -1004,7 +1006,7 @@ static int vc4_plane_mode_set(struct drm
* of the 12-pixels in that 128-bit word is the
* first pixel to be used
*/
- u32 remaining_pixels = vc4_state->src_x % 96;
+ u32 remaining_pixels = src_x % 96;
u32 aligned = remaining_pixels / 12;
u32 last_bits = remaining_pixels % 12;
@@ -1026,12 +1028,12 @@ static int vc4_plane_mode_set(struct drm
return -EINVAL;
}
pix_per_tile = tile_w / fb->format->cpp[0];
- x_off = (vc4_state->src_x % pix_per_tile) /
+ x_off = (src_x % pix_per_tile) /
(i ? h_subsample : 1) *
fb->format->cpp[i];
}
- tile = vc4_state->src_x / pix_per_tile;
+ tile = src_x / pix_per_tile;
vc4_state->offsets[i] += param * tile_w * tile;
vc4_state->offsets[i] += src_y /
@@ -1092,10 +1094,8 @@ static int vc4_plane_mode_set(struct drm
vc4_dlist_write(vc4_state,
(mix_plane_alpha ? SCALER_POS2_ALPHA_MIX : 0) |
vc4_hvs4_get_alpha_blend_mode(state) |
- VC4_SET_FIELD(vc4_state->src_w[0],
- SCALER_POS2_WIDTH) |
- VC4_SET_FIELD(vc4_state->src_h[0],
- SCALER_POS2_HEIGHT));
+ VC4_SET_FIELD(width, SCALER_POS2_WIDTH) |
+ VC4_SET_FIELD(height, SCALER_POS2_HEIGHT));
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
@@ -1148,10 +1148,8 @@ static int vc4_plane_mode_set(struct drm
/* Position Word 2: Source Image Size */
vc4_state->pos2_offset = vc4_state->dlist_count;
vc4_dlist_write(vc4_state,
- VC4_SET_FIELD(vc4_state->src_w[0],
- SCALER5_POS2_WIDTH) |
- VC4_SET_FIELD(vc4_state->src_h[0],
- SCALER5_POS2_HEIGHT));
+ VC4_SET_FIELD(width, SCALER5_POS2_WIDTH) |
+ VC4_SET_FIELD(height, SCALER5_POS2_HEIGHT));
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
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