From 65246545c3dd9bfef73e8a0f200bd5909b89a167 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Tue, 26 Jan 2010 12:10:02 -0500
Subject: evergreen: add hw cursor support

---
 src/radeon_cursor.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 64 insertions(+), 4 deletions(-)

diff --git a/src/radeon_cursor.c b/src/radeon_cursor.c
index cf5e9a04..2e607108 100644
--- a/src/radeon_cursor.c
+++ b/src/radeon_cursor.c
@@ -137,6 +137,48 @@ avivo_lock_cursor(xf86CrtcPtr crtc, Bool lock)
     OUTREG(AVIVO_D1CUR_UPDATE + radeon_crtc->crtc_offset, tmp);
 }
 
+static void
+evergreen_setup_cursor(xf86CrtcPtr crtc, Bool enable)
+{
+    ScrnInfoPtr pScrn = crtc->scrn;
+    RADEONCrtcPrivatePtr radeon_crtc = crtc->driver_private;
+    RADEONInfoPtr  info = RADEONPTR(crtc->scrn);
+    unsigned char     *RADEONMMIO = info->MMIO;
+
+    /* always use the same cursor mode even if the cursor is disabled,
+     * otherwise you may end up with cursor curruption bands
+     */
+    OUTREG(EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset,
+	   EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT));
+
+    if (enable) {
+	OUTREG(EVERGREEN_CUR_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset, 0);
+	OUTREG(EVERGREEN_CUR_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
+	       (info->fbLocation + radeon_crtc->cursor_offset + pScrn->fbOffset)
+	       & EVERGREEN_CUR_SURFACE_ADDRESS_MASK);
+	OUTREG(EVERGREEN_CUR_CONTROL + radeon_crtc->crtc_offset,
+	       EVERGREEN_CURSOR_EN | EVERGREEN_CURSOR_MODE(EVERGREEN_CURSOR_24_8_PRE_MULT));
+    }
+}
+
+static void
+evergreen_lock_cursor(xf86CrtcPtr crtc, Bool lock)
+{
+    RADEONCrtcPrivatePtr radeon_crtc = crtc->driver_private;
+    RADEONInfoPtr  info = RADEONPTR(crtc->scrn);
+    unsigned char     *RADEONMMIO = info->MMIO;
+    uint32_t tmp;
+
+    tmp = INREG(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset);
+
+    if (lock)
+	tmp |= EVERGREEN_CURSOR_UPDATE_LOCK;
+    else
+	tmp &= ~EVERGREEN_CURSOR_UPDATE_LOCK;
+
+    OUTREG(EVERGREEN_CUR_UPDATE + radeon_crtc->crtc_offset, tmp);
+}
+
 void
 radeon_crtc_show_cursor (xf86CrtcPtr crtc)
 {
@@ -146,7 +188,11 @@ radeon_crtc_show_cursor (xf86CrtcPtr crtc)
     RADEONInfoPtr      info       = RADEONPTR(pScrn);
     unsigned char     *RADEONMMIO = info->MMIO;
 
-    if (IS_AVIVO_VARIANT) {
+    if (IS_DCE4_VARIANT) {
+	evergreen_lock_cursor(crtc, TRUE);
+	evergreen_setup_cursor(crtc, TRUE);
+	evergreen_lock_cursor(crtc, FALSE);
+    } else if (IS_AVIVO_VARIANT) {
 	avivo_lock_cursor(crtc, TRUE);
 	avivo_setup_cursor(crtc, TRUE);
 	avivo_lock_cursor(crtc, FALSE);
@@ -162,7 +208,7 @@ radeon_crtc_show_cursor (xf86CrtcPtr crtc)
             return;
         }
 
-        OUTREGP(RADEON_MM_DATA, RADEON_CRTC_CUR_EN | 2 << 20, 
+        OUTREGP(RADEON_MM_DATA, RADEON_CRTC_CUR_EN | 2 << 20,
                 ~(RADEON_CRTC_CUR_EN | RADEON_CRTC_CUR_MODE_MASK));
     }
 }
@@ -176,7 +222,11 @@ radeon_crtc_hide_cursor (xf86CrtcPtr crtc)
     RADEONInfoPtr      info       = RADEONPTR(pScrn);
     unsigned char     *RADEONMMIO = info->MMIO;
 
-    if (IS_AVIVO_VARIANT) {
+    if (IS_DCE4_VARIANT) {
+	evergreen_lock_cursor(crtc, TRUE);
+	evergreen_setup_cursor(crtc, FALSE);
+	evergreen_lock_cursor(crtc, TRUE);
+    } else if (IS_AVIVO_VARIANT) {
 	avivo_lock_cursor(crtc, TRUE);
 	avivo_setup_cursor(crtc, FALSE);
 	avivo_lock_cursor(crtc, FALSE);
@@ -214,7 +264,16 @@ radeon_crtc_set_cursor_position (xf86CrtcPtr crtc, int x, int y)
     if (xorigin >= CURSOR_WIDTH)  xorigin = CURSOR_WIDTH - 1;
     if (yorigin >= CURSOR_HEIGHT) yorigin = CURSOR_HEIGHT - 1;
 
-    if (IS_AVIVO_VARIANT) {
+    if (IS_DCE4_VARIANT) {
+	/* XXX - does evergreen need a similar hack as below? */
+	evergreen_lock_cursor(crtc, TRUE);
+	OUTREG(EVERGREEN_CUR_POSITION + radeon_crtc->crtc_offset, ((xorigin ? 0 : x) << 16)
+	       | (yorigin ? 0 : y));
+	OUTREG(EVERGREEN_CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) | yorigin);
+	OUTREG(EVERGREEN_CUR_SIZE + radeon_crtc->crtc_offset,
+	       ((CURSOR_WIDTH - 1) << 16) | (CURSOR_HEIGHT - 1));
+	evergreen_lock_cursor(crtc, FALSE);
+    } else if (IS_AVIVO_VARIANT) {
 	int w = CURSOR_WIDTH;
 
 	/* avivo cursor spans the full fb width */
@@ -373,6 +432,7 @@ Bool RADEONCursorInit(ScreenPtr pScreen)
 		       (unsigned int)radeon_crtc->cursor_offset);
 	}
 	/* set the cursor mode the same on both crtcs to avoid corruption */
+	/* XXX check if this is needed on evergreen */
 	if (IS_AVIVO_VARIANT)
 	    OUTREG(AVIVO_D1CUR_CONTROL + radeon_crtc->crtc_offset,
 		   (AVIVO_D1CURSOR_MODE_24BPP << AVIVO_D1CURSOR_MODE_SHIFT));
-- 
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