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path: root/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
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Diffstat (limited to 'drivers/gpu/drm/rockchip/rockchip_drm_vop.c')
-rw-r--r--drivers/gpu/drm/rockchip/rockchip_drm_vop.c318
1 files changed, 296 insertions, 22 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index dc65161d7cad..5d8ae5e49c44 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -50,6 +50,8 @@
#define VOP_WIN_SET(x, win, name, v) \
REG_SET(x, win->base, win->phy->name, v, RELAXED)
+#define VOP_SCL_SET(x, win, name, v) \
+ REG_SET(x, win->base, win->phy->scl->name, v, RELAXED)
#define VOP_CTRL_SET(x, name, v) \
REG_SET(x, 0, (x)->data->ctrl->name, v, NORMAL)
@@ -164,12 +166,43 @@ struct vop_ctrl {
struct vop_reg vpost_st_end;
};
+struct vop_scl_regs {
+ struct vop_reg cbcr_vsd_mode;
+ struct vop_reg cbcr_vsu_mode;
+ struct vop_reg cbcr_hsd_mode;
+ struct vop_reg cbcr_ver_scl_mode;
+ struct vop_reg cbcr_hor_scl_mode;
+ struct vop_reg yrgb_vsd_mode;
+ struct vop_reg yrgb_vsu_mode;
+ struct vop_reg yrgb_hsd_mode;
+ struct vop_reg yrgb_ver_scl_mode;
+ struct vop_reg yrgb_hor_scl_mode;
+ struct vop_reg line_load_mode;
+ struct vop_reg cbcr_axi_gather_num;
+ struct vop_reg yrgb_axi_gather_num;
+ struct vop_reg vsd_cbcr_gt2;
+ struct vop_reg vsd_cbcr_gt4;
+ struct vop_reg vsd_yrgb_gt2;
+ struct vop_reg vsd_yrgb_gt4;
+ struct vop_reg bic_coe_sel;
+ struct vop_reg cbcr_axi_gather_en;
+ struct vop_reg yrgb_axi_gather_en;
+
+ struct vop_reg lb_mode;
+ struct vop_reg scale_yrgb_x;
+ struct vop_reg scale_yrgb_y;
+ struct vop_reg scale_cbcr_x;
+ struct vop_reg scale_cbcr_y;
+};
+
struct vop_win_phy {
+ const struct vop_scl_regs *scl;
const uint32_t *data_formats;
uint32_t nformats;
struct vop_reg enable;
struct vop_reg format;
+ struct vop_reg rb_swap;
struct vop_reg act_info;
struct vop_reg dsp_info;
struct vop_reg dsp_st;
@@ -199,8 +232,12 @@ struct vop_data {
static const uint32_t formats_01[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_ABGR8888,
DRM_FORMAT_RGB888,
+ DRM_FORMAT_BGR888,
DRM_FORMAT_RGB565,
+ DRM_FORMAT_BGR565,
DRM_FORMAT_NV12,
DRM_FORMAT_NV16,
DRM_FORMAT_NV24,
@@ -209,15 +246,49 @@ static const uint32_t formats_01[] = {
static const uint32_t formats_234[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_ABGR8888,
DRM_FORMAT_RGB888,
+ DRM_FORMAT_BGR888,
DRM_FORMAT_RGB565,
+ DRM_FORMAT_BGR565,
+};
+
+static const struct vop_scl_regs win_full_scl = {
+ .cbcr_vsd_mode = VOP_REG(WIN0_CTRL1, 0x1, 31),
+ .cbcr_vsu_mode = VOP_REG(WIN0_CTRL1, 0x1, 30),
+ .cbcr_hsd_mode = VOP_REG(WIN0_CTRL1, 0x3, 28),
+ .cbcr_ver_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 26),
+ .cbcr_hor_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 24),
+ .yrgb_vsd_mode = VOP_REG(WIN0_CTRL1, 0x1, 23),
+ .yrgb_vsu_mode = VOP_REG(WIN0_CTRL1, 0x1, 22),
+ .yrgb_hsd_mode = VOP_REG(WIN0_CTRL1, 0x3, 20),
+ .yrgb_ver_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 18),
+ .yrgb_hor_scl_mode = VOP_REG(WIN0_CTRL1, 0x3, 16),
+ .line_load_mode = VOP_REG(WIN0_CTRL1, 0x1, 15),
+ .cbcr_axi_gather_num = VOP_REG(WIN0_CTRL1, 0x7, 12),
+ .yrgb_axi_gather_num = VOP_REG(WIN0_CTRL1, 0xf, 8),
+ .vsd_cbcr_gt2 = VOP_REG(WIN0_CTRL1, 0x1, 7),
+ .vsd_cbcr_gt4 = VOP_REG(WIN0_CTRL1, 0x1, 6),
+ .vsd_yrgb_gt2 = VOP_REG(WIN0_CTRL1, 0x1, 5),
+ .vsd_yrgb_gt4 = VOP_REG(WIN0_CTRL1, 0x1, 4),
+ .bic_coe_sel = VOP_REG(WIN0_CTRL1, 0x3, 2),
+ .cbcr_axi_gather_en = VOP_REG(WIN0_CTRL1, 0x1, 1),
+ .yrgb_axi_gather_en = VOP_REG(WIN0_CTRL1, 0x1, 0),
+ .lb_mode = VOP_REG(WIN0_CTRL0, 0x7, 5),
+ .scale_yrgb_x = VOP_REG(WIN0_SCL_FACTOR_YRGB, 0xffff, 0x0),
+ .scale_yrgb_y = VOP_REG(WIN0_SCL_FACTOR_YRGB, 0xffff, 16),
+ .scale_cbcr_x = VOP_REG(WIN0_SCL_FACTOR_CBR, 0xffff, 0x0),
+ .scale_cbcr_y = VOP_REG(WIN0_SCL_FACTOR_CBR, 0xffff, 16),
};
static const struct vop_win_phy win01_data = {
+ .scl = &win_full_scl,
.data_formats = formats_01,
.nformats = ARRAY_SIZE(formats_01),
.enable = VOP_REG(WIN0_CTRL0, 0x1, 0),
.format = VOP_REG(WIN0_CTRL0, 0x7, 1),
+ .rb_swap = VOP_REG(WIN0_CTRL0, 0x1, 12),
.act_info = VOP_REG(WIN0_ACT_INFO, 0x1fff1fff, 0),
.dsp_info = VOP_REG(WIN0_DSP_INFO, 0x0fff0fff, 0),
.dsp_st = VOP_REG(WIN0_DSP_ST, 0x1fff1fff, 0),
@@ -234,6 +305,7 @@ static const struct vop_win_phy win23_data = {
.nformats = ARRAY_SIZE(formats_234),
.enable = VOP_REG(WIN2_CTRL0, 0x1, 0),
.format = VOP_REG(WIN2_CTRL0, 0x7, 1),
+ .rb_swap = VOP_REG(WIN2_CTRL0, 0x1, 12),
.dsp_info = VOP_REG(WIN2_DSP_INFO0, 0x0fff0fff, 0),
.dsp_st = VOP_REG(WIN2_DSP_ST0, 0x1fff1fff, 0),
.yrgb_mst = VOP_REG(WIN2_MST0, 0xffffffff, 0),
@@ -242,15 +314,6 @@ static const struct vop_win_phy win23_data = {
.dst_alpha_ctl = VOP_REG(WIN2_DST_ALPHA_CTRL, 0xff, 0),
};
-static const struct vop_win_phy cursor_data = {
- .data_formats = formats_234,
- .nformats = ARRAY_SIZE(formats_234),
- .enable = VOP_REG(HWC_CTRL0, 0x1, 0),
- .format = VOP_REG(HWC_CTRL0, 0x7, 1),
- .dsp_st = VOP_REG(HWC_DSP_ST, 0x1fff1fff, 0),
- .yrgb_mst = VOP_REG(HWC_MST, 0xffffffff, 0),
-};
-
static const struct vop_ctrl ctrl_data = {
.standby = VOP_REG(SYS_CTRL, 0x1, 22),
.gate_en = VOP_REG(SYS_CTRL, 0x1, 23),
@@ -277,19 +340,25 @@ static const struct vop_reg_data vop_init_reg_table[] = {
{DSP_CTRL0, 0x00000000},
{WIN0_CTRL0, 0x00000080},
{WIN1_CTRL0, 0x00000080},
+ /* TODO: Win2/3 support multiple area function, but we haven't found
+ * a suitable way to use it yet, so let's just use them as other windows
+ * with only area 0 enabled.
+ */
+ {WIN2_CTRL0, 0x00000010},
+ {WIN3_CTRL0, 0x00000010},
};
/*
* Note: rk3288 has a dedicated 'cursor' window, however, that window requires
* special support to get alpha blending working. For now, just use overlay
- * window 1 for the drm cursor.
+ * window 3 for the drm cursor.
+ *
*/
static const struct vop_win_data rk3288_vop_win_data[] = {
{ .base = 0x00, .phy = &win01_data, .type = DRM_PLANE_TYPE_PRIMARY },
- { .base = 0x40, .phy = &win01_data, .type = DRM_PLANE_TYPE_CURSOR },
+ { .base = 0x40, .phy = &win01_data, .type = DRM_PLANE_TYPE_OVERLAY },
{ .base = 0x00, .phy = &win23_data, .type = DRM_PLANE_TYPE_OVERLAY },
- { .base = 0x50, .phy = &win23_data, .type = DRM_PLANE_TYPE_OVERLAY },
- { .base = 0x00, .phy = &cursor_data, .type = DRM_PLANE_TYPE_OVERLAY },
+ { .base = 0x50, .phy = &win23_data, .type = DRM_PLANE_TYPE_CURSOR },
};
static const struct vop_data rk3288_vop = {
@@ -352,15 +421,32 @@ static inline void vop_mask_write_relaxed(struct vop *vop, uint32_t offset,
}
}
+static bool has_rb_swapped(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_BGR888:
+ case DRM_FORMAT_BGR565:
+ return true;
+ default:
+ return false;
+ }
+}
+
static enum vop_data_format vop_convert_format(uint32_t format)
{
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_ABGR8888:
return VOP_FMT_ARGB8888;
case DRM_FORMAT_RGB888:
+ case DRM_FORMAT_BGR888:
return VOP_FMT_RGB888;
case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_BGR565:
return VOP_FMT_RGB565;
case DRM_FORMAT_NV12:
return VOP_FMT_YUV420SP;
@@ -374,16 +460,149 @@ static enum vop_data_format vop_convert_format(uint32_t format)
}
}
+static bool is_yuv_support(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV16:
+ case DRM_FORMAT_NV24:
+ return true;
+ default:
+ return false;
+ }
+}
+
static bool is_alpha_support(uint32_t format)
{
switch (format) {
case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_ABGR8888:
return true;
default:
return false;
}
}
+static uint16_t scl_vop_cal_scale(enum scale_mode mode, uint32_t src,
+ uint32_t dst, bool is_horizontal,
+ int vsu_mode, int *vskiplines)
+{
+ uint16_t val = 1 << SCL_FT_DEFAULT_FIXPOINT_SHIFT;
+
+ if (is_horizontal) {
+ if (mode == SCALE_UP)
+ val = GET_SCL_FT_BIC(src, dst);
+ else if (mode == SCALE_DOWN)
+ val = GET_SCL_FT_BILI_DN(src, dst);
+ } else {
+ if (mode == SCALE_UP) {
+ if (vsu_mode == SCALE_UP_BIL)
+ val = GET_SCL_FT_BILI_UP(src, dst);
+ else
+ val = GET_SCL_FT_BIC(src, dst);
+ } else if (mode == SCALE_DOWN) {
+ if (vskiplines) {
+ *vskiplines = scl_get_vskiplines(src, dst);
+ val = scl_get_bili_dn_vskip(src, dst,
+ *vskiplines);
+ } else {
+ val = GET_SCL_FT_BILI_DN(src, dst);
+ }
+ }
+ }
+
+ return val;
+}
+
+static void scl_vop_cal_scl_fac(struct vop *vop, const struct vop_win_data *win,
+ uint32_t src_w, uint32_t src_h, uint32_t dst_w,
+ uint32_t dst_h, uint32_t pixel_format)
+{
+ uint16_t yrgb_hor_scl_mode, yrgb_ver_scl_mode;
+ uint16_t cbcr_hor_scl_mode = SCALE_NONE;
+ uint16_t cbcr_ver_scl_mode = SCALE_NONE;
+ int hsub = drm_format_horz_chroma_subsampling(pixel_format);
+ int vsub = drm_format_vert_chroma_subsampling(pixel_format);
+ bool is_yuv = is_yuv_support(pixel_format);
+ uint16_t cbcr_src_w = src_w / hsub;
+ uint16_t cbcr_src_h = src_h / vsub;
+ uint16_t vsu_mode;
+ uint16_t lb_mode;
+ uint32_t val;
+ int vskiplines;
+
+ if (dst_w > 3840) {
+ DRM_ERROR("Maximum destination width (3840) exceeded\n");
+ return;
+ }
+
+ yrgb_hor_scl_mode = scl_get_scl_mode(src_w, dst_w);
+ yrgb_ver_scl_mode = scl_get_scl_mode(src_h, dst_h);
+
+ if (is_yuv) {
+ cbcr_hor_scl_mode = scl_get_scl_mode(cbcr_src_w, dst_w);
+ cbcr_ver_scl_mode = scl_get_scl_mode(cbcr_src_h, dst_h);
+ if (cbcr_hor_scl_mode == SCALE_DOWN)
+ lb_mode = scl_vop_cal_lb_mode(dst_w, true);
+ else
+ lb_mode = scl_vop_cal_lb_mode(cbcr_src_w, true);
+ } else {
+ if (yrgb_hor_scl_mode == SCALE_DOWN)
+ lb_mode = scl_vop_cal_lb_mode(dst_w, false);
+ else
+ lb_mode = scl_vop_cal_lb_mode(src_w, false);
+ }
+
+ VOP_SCL_SET(vop, win, lb_mode, lb_mode);
+ if (lb_mode == LB_RGB_3840X2) {
+ if (yrgb_ver_scl_mode != SCALE_NONE) {
+ DRM_ERROR("ERROR : not allow yrgb ver scale\n");
+ return;
+ }
+ if (cbcr_ver_scl_mode != SCALE_NONE) {
+ DRM_ERROR("ERROR : not allow cbcr ver scale\n");
+ return;
+ }
+ vsu_mode = SCALE_UP_BIL;
+ } else if (lb_mode == LB_RGB_2560X4) {
+ vsu_mode = SCALE_UP_BIL;
+ } else {
+ vsu_mode = SCALE_UP_BIC;
+ }
+
+ val = scl_vop_cal_scale(yrgb_hor_scl_mode, src_w, dst_w,
+ true, 0, NULL);
+ VOP_SCL_SET(vop, win, scale_yrgb_x, val);
+ val = scl_vop_cal_scale(yrgb_ver_scl_mode, src_h, dst_h,
+ false, vsu_mode, &vskiplines);
+ VOP_SCL_SET(vop, win, scale_yrgb_y, val);
+
+ VOP_SCL_SET(vop, win, vsd_yrgb_gt4, vskiplines == 4);
+ VOP_SCL_SET(vop, win, vsd_yrgb_gt2, vskiplines == 2);
+
+ VOP_SCL_SET(vop, win, yrgb_hor_scl_mode, yrgb_hor_scl_mode);
+ VOP_SCL_SET(vop, win, yrgb_ver_scl_mode, yrgb_ver_scl_mode);
+ VOP_SCL_SET(vop, win, yrgb_hsd_mode, SCALE_DOWN_BIL);
+ VOP_SCL_SET(vop, win, yrgb_vsd_mode, SCALE_DOWN_BIL);
+ VOP_SCL_SET(vop, win, yrgb_vsu_mode, vsu_mode);
+ if (is_yuv) {
+ val = scl_vop_cal_scale(cbcr_hor_scl_mode, cbcr_src_w,
+ dst_w, true, 0, NULL);
+ VOP_SCL_SET(vop, win, scale_cbcr_x, val);
+ val = scl_vop_cal_scale(cbcr_ver_scl_mode, cbcr_src_h,
+ dst_h, false, vsu_mode, &vskiplines);
+ VOP_SCL_SET(vop, win, scale_cbcr_y, val);
+
+ VOP_SCL_SET(vop, win, vsd_cbcr_gt4, vskiplines == 4);
+ VOP_SCL_SET(vop, win, vsd_cbcr_gt2, vskiplines == 2);
+ VOP_SCL_SET(vop, win, cbcr_hor_scl_mode, cbcr_hor_scl_mode);
+ VOP_SCL_SET(vop, win, cbcr_ver_scl_mode, cbcr_ver_scl_mode);
+ VOP_SCL_SET(vop, win, cbcr_hsd_mode, SCALE_DOWN_BIL);
+ VOP_SCL_SET(vop, win, cbcr_vsd_mode, SCALE_DOWN_BIL);
+ VOP_SCL_SET(vop, win, cbcr_vsu_mode, vsu_mode);
+ }
+}
+
static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
{
unsigned long flags;
@@ -458,6 +677,7 @@ static void vop_enable(struct drm_crtc *crtc)
goto err_disable_aclk;
}
+ memcpy(vop->regs, vop->regsbak, vop->len);
/*
* At here, vop clock & iommu is enable, R/W vop regs would be safe.
*/
@@ -578,16 +798,22 @@ static int vop_update_plane_event(struct drm_plane *plane,
struct vop *vop = to_vop(crtc);
struct drm_gem_object *obj;
struct rockchip_gem_object *rk_obj;
+ struct drm_gem_object *uv_obj;
+ struct rockchip_gem_object *rk_uv_obj;
unsigned long offset;
unsigned int actual_w;
unsigned int actual_h;
unsigned int dsp_stx;
unsigned int dsp_sty;
unsigned int y_vir_stride;
+ unsigned int uv_vir_stride = 0;
dma_addr_t yrgb_mst;
+ dma_addr_t uv_mst = 0;
enum vop_data_format format;
uint32_t val;
bool is_alpha;
+ bool rb_swap;
+ bool is_yuv;
bool visible;
int ret;
struct drm_rect dest = {
@@ -608,11 +834,15 @@ static int vop_update_plane_event(struct drm_plane *plane,
.y2 = crtc->mode.vdisplay,
};
bool can_position = plane->type != DRM_PLANE_TYPE_PRIMARY;
+ int min_scale = win->phy->scl ? FRAC_16_16(1, 8) :
+ DRM_PLANE_HELPER_NO_SCALING;
+ int max_scale = win->phy->scl ? FRAC_16_16(8, 1) :
+ DRM_PLANE_HELPER_NO_SCALING;
ret = drm_plane_helper_check_update(plane, crtc, fb,
&src, &dest, &clip,
- DRM_PLANE_HELPER_NO_SCALING,
- DRM_PLANE_HELPER_NO_SCALING,
+ min_scale,
+ max_scale,
can_position, false, &visible);
if (ret)
return ret;
@@ -621,6 +851,9 @@ static int vop_update_plane_event(struct drm_plane *plane,
return 0;
is_alpha = is_alpha_support(fb->pixel_format);
+ rb_swap = has_rb_swapped(fb->pixel_format);
+ is_yuv = is_yuv_support(fb->pixel_format);
+
format = vop_convert_format(fb->pixel_format);
if (format < 0)
return format;
@@ -633,19 +866,46 @@ static int vop_update_plane_event(struct drm_plane *plane,
rk_obj = to_rockchip_obj(obj);
+ if (is_yuv) {
+ /*
+ * Src.x1 can be odd when do clip, but yuv plane start point
+ * need align with 2 pixel.
+ */
+ val = (src.x1 >> 16) % 2;
+ src.x1 += val << 16;
+ src.x2 += val << 16;
+ }
+
actual_w = (src.x2 - src.x1) >> 16;
actual_h = (src.y2 - src.y1) >> 16;
- crtc_x = max(0, crtc_x);
- crtc_y = max(0, crtc_y);
- dsp_stx = crtc_x + crtc->mode.htotal - crtc->mode.hsync_start;
- dsp_sty = crtc_y + crtc->mode.vtotal - crtc->mode.vsync_start;
+ dsp_stx = dest.x1 + crtc->mode.htotal - crtc->mode.hsync_start;
+ dsp_sty = dest.y1 + crtc->mode.vtotal - crtc->mode.vsync_start;
- offset = (src.x1 >> 16) * (fb->bits_per_pixel >> 3);
+ offset = (src.x1 >> 16) * drm_format_plane_cpp(fb->pixel_format, 0);
offset += (src.y1 >> 16) * fb->pitches[0];
- yrgb_mst = rk_obj->dma_addr + offset;
- y_vir_stride = fb->pitches[0] / (fb->bits_per_pixel >> 3);
+ yrgb_mst = rk_obj->dma_addr + offset + fb->offsets[0];
+ y_vir_stride = fb->pitches[0] >> 2;
+
+ if (is_yuv) {
+ int hsub = drm_format_horz_chroma_subsampling(fb->pixel_format);
+ int vsub = drm_format_vert_chroma_subsampling(fb->pixel_format);
+ int bpp = drm_format_plane_cpp(fb->pixel_format, 1);
+
+ uv_obj = rockchip_fb_get_gem_obj(fb, 1);
+ if (!uv_obj) {
+ DRM_ERROR("fail to get uv object from framebuffer\n");
+ return -EINVAL;
+ }
+ rk_uv_obj = to_rockchip_obj(uv_obj);
+ uv_vir_stride = fb->pitches[1] >> 2;
+
+ offset = (src.x1 >> 16) * bpp / hsub;
+ offset += (src.y1 >> 16) * fb->pitches[1] / vsub;
+
+ uv_mst = rk_uv_obj->dma_addr + offset + fb->offsets[1];
+ }
/*
* If this plane update changes the plane's framebuffer, (or more
@@ -682,13 +942,27 @@ static int vop_update_plane_event(struct drm_plane *plane,
VOP_WIN_SET(vop, win, format, format);
VOP_WIN_SET(vop, win, yrgb_vir, y_vir_stride);
VOP_WIN_SET(vop, win, yrgb_mst, yrgb_mst);
+ if (is_yuv) {
+ VOP_WIN_SET(vop, win, uv_vir, uv_vir_stride);
+ VOP_WIN_SET(vop, win, uv_mst, uv_mst);
+ }
+
+ if (win->phy->scl)
+ scl_vop_cal_scl_fac(vop, win, actual_w, actual_h,
+ dest.x2 - dest.x1, dest.y2 - dest.y1,
+ fb->pixel_format);
+
val = (actual_h - 1) << 16;
val |= (actual_w - 1) & 0xffff;
VOP_WIN_SET(vop, win, act_info, val);
+
+ val = (dest.y2 - dest.y1 - 1) << 16;
+ val |= (dest.x2 - dest.x1 - 1) & 0xffff;
VOP_WIN_SET(vop, win, dsp_info, val);
val = (dsp_sty - 1) << 16;
val |= (dsp_stx - 1) & 0xffff;
VOP_WIN_SET(vop, win, dsp_st, val);
+ VOP_WIN_SET(vop, win, rb_swap, rb_swap);
if (is_alpha) {
VOP_WIN_SET(vop, win, dst_alpha_ctl,
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-03-27 07:34:22 +0000