From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 8 Dec 2017 12:16:22 +0000
Subject: drm/armada: fix UV swap code
Git-commit: 9c898c495490b129bd4445630e3c6641e8389fc8
Patch-mainline: v4.15-rc7
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
The UV swap code was not always programming things correctly when
the source origin box has been offset. Fix this.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/armada/armada_crtc.h | 2 +
drivers/gpu/drm/armada/armada_overlay.c | 38 ++++++++++++++++----------------
2 files changed, 21 insertions(+), 19 deletions(-)
--- a/drivers/gpu/drm/armada/armada_crtc.h
+++ b/drivers/gpu/drm/armada/armada_crtc.h
@@ -42,6 +42,8 @@ struct armada_plane_work {
};
struct armada_plane_state {
+ u16 src_x;
+ u16 src_y;
u32 src_hw;
u32 dst_hw;
u32 dst_yx;
--- a/drivers/gpu/drm/armada/armada_overlay.c
+++ b/drivers/gpu/drm/armada/armada_overlay.c
@@ -99,6 +99,7 @@ armada_ovl_plane_update(struct drm_plane
{
struct armada_ovl_plane *dplane = drm_to_armada_ovl_plane(plane);
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
+ const struct drm_format_info *format;
struct drm_rect src = {
.x1 = src_x,
.y1 = src_y,
@@ -117,7 +118,7 @@ armada_ovl_plane_update(struct drm_plane
};
uint32_t val, ctrl0;
unsigned idx = 0;
- bool visible;
+ bool visible, fb_changed;
int ret;
trace_armada_ovl_plane_update(plane, crtc, fb,
@@ -138,6 +139,18 @@ armada_ovl_plane_update(struct drm_plane
if (!visible)
ctrl0 &= ~CFG_DMA_ENA;
+ /*
+ * Shifting a YUV packed format image by one pixel causes the U/V
+ * planes to swap. Compensate for it by also toggling the UV swap.
+ */
+ format = fb->format;
+ if (format->num_planes == 1 && src.x1 >> 16 & (format->hsub - 1))
+ ctrl0 ^= CFG_DMA_MOD(CFG_SWAPUV);
+
+ fb_changed = plane->fb != fb ||
+ dplane->base.state.src_x != src.x1 >> 16 ||
+ dplane->base.state.src_y != src.y1 >> 16;
+
if (!dcrtc->plane) {
dcrtc->plane = plane;
armada_ovl_update_attr(&dplane->prop, dcrtc);
@@ -145,7 +158,7 @@ armada_ovl_plane_update(struct drm_plane
/* FIXME: overlay on an interlaced display */
/* Just updating the position/size? */
- if (plane->fb == fb && dplane->base.state.ctrl0 == ctrl0) {
+ if (!fb_changed && dplane->base.state.ctrl0 == ctrl0) {
val = (drm_rect_height(&src) & 0xffff0000) |
drm_rect_width(&src) >> 16;
dplane->base.state.src_hw = val;
@@ -169,9 +182,8 @@ armada_ovl_plane_update(struct drm_plane
if (armada_drm_plane_work_wait(&dplane->base, HZ / 25) == 0)
armada_drm_plane_work_cancel(dcrtc, &dplane->base);
- if (plane->fb != fb) {
- u32 addrs[3], pixel_format;
- int num_planes, hsub;
+ if (fb_changed) {
+ u32 addrs[3];
/*
* Take a reference on the new framebuffer - we want to
@@ -182,23 +194,11 @@ armada_ovl_plane_update(struct drm_plane
if (plane->fb)
armada_ovl_retire_fb(dplane, plane->fb);
- src_y = src.y1 >> 16;
- src_x = src.x1 >> 16;
+ dplane->base.state.src_y = src_y = src.y1 >> 16;
+ dplane->base.state.src_x = src_x = src.x1 >> 16;
armada_drm_plane_calc_addrs(addrs, fb, src_x, src_y);
- pixel_format = fb->format->format;
- hsub = drm_format_horz_chroma_subsampling(pixel_format);
- num_planes = fb->format->num_planes;
-
- /*
- * Annoyingly, shifting a YUYV-format image by one pixel
- * causes the U/V planes to toggle. Toggle the UV swap.
- * (Unfortunately, this causes momentary colour flickering.)
- */
- if (src_x & (hsub - 1) && num_planes == 1)
- ctrl0 ^= CFG_DMA_MOD(CFG_SWAPUV);
-
armada_reg_queue_set(dplane->vbl.regs, idx, addrs[0],
LCD_SPU_DMA_START_ADDR_Y0);
armada_reg_queue_set(dplane->vbl.regs, idx, addrs[1],