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openwrt/target/linux/bcm27xx/patches-6.6/950-0598-drm-vc4-Move-the-buffer-offset-out-of-the-vc4_plane_.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

156 lines
5.3 KiB
Diff

From a4f577bc6a231542ed348fec6d2c00d813a411cd Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Mon, 25 Sep 2023 16:57:07 +0100
Subject: [PATCH 0598/1085] drm/vc4: Move the buffer offset out of the
vc4_plane_state
The offset fields in vc4_plane_state are described as being
the offset for each buffer in the bo, however it is used to
store the complete DMA address that is then written into the
register.
The DMA address including the fb ofset can be retrieved
using drm_fb_dma_get_gem_addr, and the offset adjustment due to
clipping is local to vc4_plane_mode_set.
Drop the offset field from the state, and compute the complete
DMA address in vc4_plane_mode_set.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/vc4/vc4_drv.h | 5 ----
drivers/gpu/drm/vc4/vc4_plane.c | 51 +++++++++++++--------------------
2 files changed, 20 insertions(+), 36 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -431,11 +431,6 @@ struct vc4_plane_state {
bool is_unity;
bool is_yuv;
- /* Offset to start scanning out from the start of the plane's
- * BO.
- */
- u32 offsets[3];
-
/* Our allocation in LBM for temporary storage during scaling. */
struct drm_mm_node lbm;
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -450,12 +450,11 @@ static int vc4_plane_setup_clipping_and_
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
struct drm_framebuffer *fb = state->fb;
- struct drm_gem_dma_object *bo;
int num_planes = fb->format->num_planes;
struct drm_crtc_state *crtc_state;
u32 h_subsample = fb->format->hsub;
u32 v_subsample = fb->format->vsub;
- int i, ret;
+ int ret;
crtc_state = drm_atomic_get_existing_crtc_state(state->state,
state->crtc);
@@ -469,11 +468,6 @@ static int vc4_plane_setup_clipping_and_
if (ret)
return ret;
- for (i = 0; i < num_planes; i++) {
- bo = drm_fb_dma_get_gem_obj(fb, i);
- vc4_state->offsets[i] = bo->dma_addr + fb->offsets[i];
- }
-
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;
@@ -896,6 +890,7 @@ static int vc4_plane_mode_set(struct drm
u32 width, height;
u32 hvs_format = format->hvs;
unsigned int rotation;
+ u32 offsets[3] = { 0 };
int ret, i;
if (vc4_state->dlist_initialized)
@@ -943,13 +938,8 @@ static int vc4_plane_mode_set(struct drm
* out.
*/
for (i = 0; i < num_planes; i++) {
- vc4_state->offsets[i] += src_y /
- (i ? v_subsample : 1) *
- fb->pitches[i];
-
- vc4_state->offsets[i] += src_x /
- (i ? h_subsample : 1) *
- fb->format->cpp[i];
+ offsets[i] += src_y / (i ? v_subsample : 1) * fb->pitches[i];
+ offsets[i] += src_x / (i ? h_subsample : 1) * fb->format->cpp[i];
}
break;
@@ -1004,19 +994,18 @@ static int vc4_plane_mode_set(struct drm
VC4_SET_FIELD(y_off, SCALER_PITCH0_TILE_Y_OFFSET) |
VC4_SET_FIELD(tiles_l, SCALER_PITCH0_TILE_WIDTH_L) |
VC4_SET_FIELD(tiles_r, SCALER_PITCH0_TILE_WIDTH_R));
- vc4_state->offsets[0] += tiles_t * (tiles_w << tile_size_shift);
- vc4_state->offsets[0] += subtile_y << 8;
- vc4_state->offsets[0] += utile_y << 4;
+ offsets[0] += tiles_t * (tiles_w << tile_size_shift);
+ offsets[0] += subtile_y << 8;
+ offsets[0] += utile_y << 4;
/* Rows of tiles alternate left-to-right and right-to-left. */
if (tiles_t & 1) {
pitch0 |= SCALER_PITCH0_TILE_INITIAL_LINE_DIR;
- vc4_state->offsets[0] += (tiles_w - tiles_l) <<
- tile_size_shift;
- vc4_state->offsets[0] -= (1 + !tile_y) << 10;
+ offsets[0] += (tiles_w - tiles_l) << tile_size_shift;
+ offsets[0] -= (1 + !tile_y) << 10;
} else {
- vc4_state->offsets[0] += tiles_l << tile_size_shift;
- vc4_state->offsets[0] += tile_y << 10;
+ offsets[0] += tiles_l << tile_size_shift;
+ offsets[0] += tile_y << 10;
}
break;
@@ -1105,11 +1094,9 @@ static int vc4_plane_mode_set(struct drm
tile = src_x / pix_per_tile;
- vc4_state->offsets[i] += param * tile_w * tile;
- vc4_state->offsets[i] += src_y /
- (i ? v_subsample : 1) *
- tile_w;
- vc4_state->offsets[i] += x_off & ~(i ? 1 : 0);
+ offsets[i] += param * tile_w * tile;
+ offsets[i] += src_y / (i ? v_subsample : 1) * tile_w;
+ offsets[i] += x_off & ~(i ? 1 : 0);
}
pitch0 = VC4_SET_FIELD(param, SCALER_TILE_HEIGHT);
@@ -1253,8 +1240,12 @@ static int vc4_plane_mode_set(struct drm
* The pointers may be any byte address.
*/
vc4_state->ptr0_offset[0] = vc4_state->dlist_count;
- for (i = 0; i < num_planes; i++)
- vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
+
+ for (i = 0; i < num_planes; i++) {
+ dma_addr_t paddr = drm_fb_dma_get_gem_addr(fb, state, i);
+
+ vc4_dlist_write(vc4_state, paddr + offsets[i]);
+ }
/* Pointer Context Word 0/1/2: Written by the HVS */
for (i = 0; i < num_planes; i++)
@@ -1517,8 +1508,6 @@ static void vc4_plane_atomic_async_updat
sizeof(vc4_state->y_scaling));
vc4_state->is_unity = new_vc4_state->is_unity;
vc4_state->is_yuv = new_vc4_state->is_yuv;
- memcpy(vc4_state->offsets, new_vc4_state->offsets,
- sizeof(vc4_state->offsets));
vc4_state->needs_bg_fill = new_vc4_state->needs_bg_fill;
/* Update the current vc4_state pos0, pos2 and ptr0 dlist entries. */