[PATCH 2/3] radeon: add support for reverse prime (v2)

[alexdeucher at gmail.com]

From: Dave Airlie <airlied at redhat.com>

This adds support for reverse prime configurations

v2: fix compilation with older xservers

Signed-off-by: Alex Deucher <alexdeucher at gmail.com>
---
 src/drmmode_display.c |   40 ++++++++++++++++++++++++++++++++++++++++
 src/radeon_kms.c      |    4 ++--
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 76a7333..c593997 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -52,6 +52,9 @@
 #define DEFAULT_NOMINAL_FRAME_RATE 60
 
 static Bool
+drmmode_xf86crtc_resize (ScrnInfoPtr scrn, int width, int height);
+
+static Bool
 RADEONZaphodStringMatches(ScrnInfoPtr pScrn, const char *s, char *output_name)
 {
     int i = 0;
@@ -522,6 +525,11 @@ drmmode_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
 		drmmode_ConvertToKMode(crtc->scrn, &kmode, mode);
 
 		fb_id = drmmode->fb_id;
+#ifdef RADEON_PIXMAP_SHARING
+		if (crtc->randr_crtc && crtc->randr_crtc->scanout_pixmap)
+			x = y = 0;
+		else
+#endif
 		if (drmmode_crtc->rotate_fb_id) {
 			fb_id = drmmode_crtc->rotate_fb_id;
 			x = y = 0;
@@ -727,6 +735,35 @@ drmmode_crtc_gamma_set(xf86CrtcPtr crtc, uint16_t *red, uint16_t *green,
 			    size, red, green, blue);
 }
 
+#ifdef RADEON_PIXMAP_SHARING
+static Bool
+drmmode_set_scanout_pixmap(xf86CrtcPtr crtc, PixmapPtr ppix)
+{
+	ScreenPtr screen = xf86ScrnToScreen(crtc->scrn);
+	PixmapPtr screenpix = screen->GetScreenPixmap(screen);
+
+	if (!ppix) {
+		if (crtc->randr_crtc->scanout_pixmap)
+			PixmapStopDirtyTracking(crtc->randr_crtc->scanout_pixmap, screenpix);
+		return TRUE;
+	}
+
+	if (ppix->drawable.width > screenpix->drawable.width ||
+	    ppix->drawable.height > screenpix->drawable.height) {
+		Bool ret;
+		ret = drmmode_xf86crtc_resize(crtc->scrn, ppix->drawable.width, ppix->drawable.height);
+		if (ret == FALSE)
+			return FALSE;
+
+		screenpix = screen->GetScreenPixmap(screen);
+		screen->width = screenpix->drawable.width = ppix->drawable.width;
+		screen->height = screenpix->drawable.height = ppix->drawable.height;
+	}
+	PixmapStartDirtyTracking(ppix, screenpix, 0, 0);
+	return TRUE;
+}
+#endif
+
 static const xf86CrtcFuncsRec drmmode_crtc_funcs = {
     .dpms = drmmode_crtc_dpms,
     .set_mode_major = drmmode_set_mode_major,
@@ -741,6 +778,9 @@ static const xf86CrtcFuncsRec drmmode_crtc_funcs = {
     .shadow_allocate = drmmode_crtc_shadow_allocate,
     .shadow_destroy = drmmode_crtc_shadow_destroy,
     .destroy = NULL, /* XXX */
+#ifdef RADEON_PIXMAP_SHARING
+    .set_scanout_pixmap = drmmode_set_scanout_pixmap,
+#endif
 };
 
 int drmmode_get_crtc_id(xf86CrtcPtr crtc)
diff --git a/src/radeon_kms.c b/src/radeon_kms.c
index c3f50d5..edc3b04 100644
--- a/src/radeon_kms.c
+++ b/src/radeon_kms.c
@@ -257,7 +257,7 @@ redisplay_dirty(ScreenPtr screen, PixmapDirtyUpdatePtr dirty)
 	ScrnInfoPtr pScrn = xf86ScreenToScrn(screen);
 	RegionRec pixregion;
 
-	PixmapRegionInit(&pixregion, dirty->slave_dst->master_pixmap);
+	PixmapRegionInit(&pixregion, dirty->slave_dst);
 	DamageRegionAppend(&dirty->slave_dst->drawable, &pixregion);
 	PixmapSyncDirtyHelper(dirty, &pixregion);
 
@@ -766,7 +766,7 @@ static void RADEONSetupCapabilities(ScrnInfoPtr pScrn)
 	if (value & DRM_PRIME_CAP_EXPORT)
 	    pScrn->capabilities |= RR_Capability_SourceOutput | RR_Capability_SinkOffload;
 	if (value & DRM_PRIME_CAP_IMPORT)
-	    pScrn->capabilities |= RR_Capability_SourceOffload;
+	    pScrn->capabilities |= RR_Capability_SourceOffload | RR_Capability_SinkOutput;
     }
 #endif
 }
-- 
1.7.7.5