[PATCH xserver 3/5] xfree86: Re-set current cursor after RandR 1.2 CRTC configuration change

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

Add xf86CursorResetCursor, which allows switching between HW and SW
cursor depending on the current state.

Call it from xf86DisableUnusedFunctions, which is called after any CRTC
configuration change such as setting a mode or disabling a CRTC. This
makes sure that SW cursor is used e.g. while a transform is in use on
any CRTC or while there are active PRIME output slaves, and enables HW
cursor again once none of those conditions are true anymore.

Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 hw/xfree86/modes/xf86Crtc.c    |  6 ++++++
 hw/xfree86/ramdac/xf86Cursor.c | 24 ++++++++++++++++++++++++
 hw/xfree86/ramdac/xf86Cursor.h |  1 +
 3 files changed, 31 insertions(+)

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 38bc58c..2639a30 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3121,6 +3121,12 @@ xf86DisableUnusedFunctions(ScrnInfoPtr pScrn)
         xf86_crtc_notify(pScrn->pScreen);
     if (pScrn->ModeSet)
         pScrn->ModeSet(pScrn);
+    if (pScrn->pScreen) {
+        if (pScrn->pScreen->isGPU)
+            xf86CursorResetCursor(pScrn->pScreen->current_master);
+        else
+            xf86CursorResetCursor(pScrn->pScreen);
+    }
 }
 
 #ifdef RANDR_12_INTERFACE
diff --git a/hw/xfree86/ramdac/xf86Cursor.c b/hw/xfree86/ramdac/xf86Cursor.c
index 2a54571..c061b80 100644
--- a/hw/xfree86/ramdac/xf86Cursor.c
+++ b/hw/xfree86/ramdac/xf86Cursor.c
@@ -385,6 +385,30 @@ xf86CursorSetCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCurs,
     (*ScreenPriv->spriteFuncs->SetCursor) (pDev, pScreen, pCurs, x, y);
 }
 
+/* Re-set the current cursor. This will switch between hardware and software
+ * cursor depending on whether hardware cursor is currently supported
+ * according to the driver.
+ */
+void
+xf86CursorResetCursor(ScreenPtr pScreen)
+{
+    xf86CursorScreenPtr ScreenPriv;
+
+    if (!inputInfo.pointer)
+        return;
+
+    if (!dixPrivateKeyRegistered(xf86CursorScreenKey))
+        return;
+
+    ScreenPriv = (xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
+                                                        xf86CursorScreenKey);
+    if (!ScreenPriv)
+        return;
+
+    xf86CursorSetCursor(inputInfo.pointer, pScreen, ScreenPriv->CurrentCursor,
+                        ScreenPriv->x, ScreenPriv->y);
+}
+
 static void
 xf86CursorMoveCursor(DeviceIntPtr pDev, ScreenPtr pScreen, int x, int y)
 {
diff --git a/hw/xfree86/ramdac/xf86Cursor.h b/hw/xfree86/ramdac/xf86Cursor.h
index 8c98bb1..6e88240 100644
--- a/hw/xfree86/ramdac/xf86Cursor.h
+++ b/hw/xfree86/ramdac/xf86Cursor.h
@@ -59,6 +59,7 @@ extern _X_EXPORT Bool xf86InitCursor(ScreenPtr pScreen,
                                      xf86CursorInfoPtr infoPtr);
 extern _X_EXPORT xf86CursorInfoPtr xf86CreateCursorInfoRec(void);
 extern _X_EXPORT void xf86DestroyCursorInfoRec(xf86CursorInfoPtr);
+extern _X_EXPORT void xf86CursorResetCursor(ScreenPtr pScreen);
 extern _X_EXPORT void xf86ForceHWCursor(ScreenPtr pScreen, Bool on);
 
 #define HARDWARE_CURSOR_INVERT_MASK 			0x00000001
-- 
2.6.2