Synchronize drawable to the pipe where the bigger part can be visible.
This requires the DDX driver to set the corresponding fields in the SAREA,
so check its minor version.
diff --git a/src/mesa/drivers/dri/i915/intel_context.c b/src/mesa/drivers/dri/i915/intel_context.c
index 45d8fb3..480b442 100644
--- a/src/mesa/drivers/dri/i915/intel_context.c
+++ b/src/mesa/drivers/dri/i915/intel_context.c
@@ -572,6 +572,36 @@
{
GLcontext *ctx = &intel->ctx;
+ if (intel->intelScreen->driScrnPriv->ddxMinor >= 7) {
+ drmI830Sarea *sarea = intel->sarea;
+ drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
+ .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
+ drm_clip_rect_t pipeA_rect = { .x1 = sarea->pipeA_x,
+ .x2 = sarea->pipeA_x + sarea->pipeA_w,
+ .y1 = sarea->pipeA_y,
+ .y2 = sarea->pipeA_y + sarea->pipeA_h };
+ drm_clip_rect_t pipeB_rect = { .x1 = sarea->pipeB_x,
+ .x2 = sarea->pipeB_x + sarea->pipeB_w,
+ .y1 = sarea->pipeB_y,
+ .y2 = sarea->pipeB_y + sarea->pipeB_h };
+ GLint areaA = driIntersectArea( drw_rect, pipeA_rect );
+ GLint areaB = driIntersectArea( drw_rect, pipeB_rect );
+ GLuint flags = intel->vblank_flags;
+
+ if (areaB > areaA || (areaA > 0 && areaB > 0)) {
+ flags = intel->vblank_flags | VBLANK_FLAG_SECONDARY;
+ } else {
+ flags = intel->vblank_flags & ~VBLANK_FLAG_SECONDARY;
+ }
+
+ if (flags != intel->vblank_flags) {
+ intel->vblank_flags = flags;
+ driGetCurrentVBlank(dPriv, intel->vblank_flags, &intel->vbl_seq);
+ }
+ } else {
+ intel->vblank_flags &= ~VBLANK_FLAG_SECONDARY;
+ }
+
ctx->Driver.Scissor( ctx, ctx->Scissor.X, ctx->Scissor.Y,
ctx->Scissor.Width, ctx->Scissor.Height );