Enable hardware overlay on 965

Based on Maxim Levitsky's patch for the same.  Many thanks to Maxim for
discovering that this features still works in recent hardware!

3 files changed, 10 insertions, 21 deletions

diff --git a/src/common.h b/src/common.h
index c0af1ad2..09f28f88 100644
--- a/src/common.h
+++ b/src/common.h
@@ -440,7 +440,7 @@ extern int I810_DEBUG;
 
 #define IS_MOBILE(pI810) (IS_I830(pI810) || IS_I85X(pI810) || IS_I915GM(pI810) || IS_I945GM(pI810) || IS_I965GM(pI810) || IS_IGD_GM(pI810))
 /* mark chipsets for using gfx VM offset for overlay */
-#define OVERLAY_NOPHYSICAL(pI810) (IS_G33CLASS(pI810))
+#define OVERLAY_NOPHYSICAL(pI810) (IS_G33CLASS(pI810) || IS_I965G(pI810))
 /* chipsets require graphics mem for hardware status page */
 #define HWS_NEED_GFX(pI810) (IS_G33CLASS(pI810) || IS_IGD_GM(pI810))
 
diff --git a/src/i830_memory.c b/src/i830_memory.c
index ad34f19c..e9097ecb 100644
--- a/src/i830_memory.c
+++ b/src/i830_memory.c
@@ -1044,15 +1044,13 @@ i830_allocate_overlay(ScrnInfoPtr pScrn)
     if (!OVERLAY_NOPHYSICAL(pI830))
 	flags |= NEED_PHYSICAL_ADDR;
 
-    if (!IS_I965G(pI830)) {
-	pI830->overlay_regs = i830_allocate_memory(pScrn, "overlay registers",
-						   OVERLAY_SIZE, GTT_PAGE_SIZE,
-						   flags);
-	if (pI830->overlay_regs == NULL) {
-	    xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
-		       "Failed to allocate Overlay register space.\n");
-	    /* This failure isn't fatal. */
-	}
+    pI830->overlay_regs = i830_allocate_memory(pScrn, "overlay registers",
+					       OVERLAY_SIZE, GTT_PAGE_SIZE,
+					       flags);
+    if (pI830->overlay_regs == NULL) {
+	xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+		   "Failed to allocate Overlay register space.\n");
+	/* This failure isn't fatal. */
     }
 
     return TRUE;
diff --git a/src/i830_video.c b/src/i830_video.c
index 79e05740..bf260e46 100644
--- a/src/i830_video.c
+++ b/src/i830_video.c
@@ -352,7 +352,7 @@ i830_overlay_switch_to_crtc (ScrnInfoPtr pScrn, xf86CrtcPtr crtc)
     I830CrtcPrivatePtr  intel_crtc = crtc->driver_private;
     int			pipeconf_reg = intel_crtc->pipe == 0 ? PIPEACONF : PIPEBCONF;
 
-    if (INREG(pipeconf_reg) & PIPEACONF_DOUBLE_WIDE)
+    if (!IS_I965G(pI830) && (INREG(pipeconf_reg) & PIPEACONF_DOUBLE_WIDE))
 	pPriv->overlayOK = FALSE;
     else
 	pPriv->overlayOK = TRUE;
@@ -580,8 +580,7 @@ I830InitVideo(ScreenPtr pScreen)
     }
 
     /* Set up overlay video if we can do it at this depth. */
-    if (!IS_I965G(pI830) && pScrn->bitsPerPixel != 8 &&
-	pI830->overlay_regs != NULL)
+    if (pScrn->bitsPerPixel != 8 && pI830->overlay_regs != NULL)
     {
 	overlayAdaptor = I830SetupImageVideoOverlay(pScreen);
 	if (overlayAdaptor != NULL) {
@@ -2563,10 +2562,6 @@ I830VideoBlockHandler(int i, pointer blockData, pointer pTimeout,
     if (pI830->adaptor == NULL)
         return;
 
-    /* No overlay scaler on the 965. */
-    if (IS_I965G(pI830))
-        return;
-
     pPriv = GET_PORT_PRIVATE(pScrn);
 
     if (pPriv->videoStatus & TIMER_MASK) {
@@ -2846,10 +2841,6 @@ i830_crtc_dpms_video(xf86CrtcPtr crtc, Bool on)
     if (pI830->adaptor == NULL)
 	return;
 
-    /* No overlay scaler on the 965. */
-    if (IS_I965G(pI830))
-	return;
-
     pPriv = GET_PORT_PRIVATE(pScrn);
 
     if (crtc != pPriv->current_crtc)