r3xx-r5xx: switch to 1/12 subpixel precision

- based on similar patch in Jerome's cs ddx tree
- also fix clipping offsets
- should eventually allow for 4k render targets
- mesa driver uses 1/12 mode, this avoids changing the
  subpixel mode when switching between ddx and mesa

4 files changed, 31 insertions, 27 deletions

diff --git a/src/radeon_accel.c b/src/radeon_accel.c
index 70347fe9..f90b3864 100644
--- a/src/radeon_accel.c
+++ b/src/radeon_accel.c
@@ -493,7 +493,7 @@ void RADEONEngineInit(ScrnInfoPtr pScrn)
 		   "num quad-pipes is %d\n", info->accel_state->num_gb_pipes);
 
     if (IS_R300_3D || IS_R500_3D) {
-	uint32_t gb_tile_config = (R300_ENABLE_TILING | R300_TILE_SIZE_16 | R300_SUBPIXEL_1_16);
+	uint32_t gb_tile_config = (R300_ENABLE_TILING | R300_TILE_SIZE_16);
 
 	switch(info->accel_state->num_gb_pipes) {
 	case 2: gb_tile_config |= R300_PIPE_COUNT_R300; break;
diff --git a/src/radeon_commonfuncs.c b/src/radeon_commonfuncs.c
index 3dbe6173..ba358ab6 100644
--- a/src/radeon_commonfuncs.c
+++ b/src/radeon_commonfuncs.c
@@ -69,7 +69,7 @@ static void FUNC_NAME(RADEONInit3DEngine)(ScrnInfoPtr pScrn)
 	OUT_ACCEL_REG(RADEON_WAIT_UNTIL, RADEON_WAIT_2D_IDLECLEAN | RADEON_WAIT_3D_IDLECLEAN);
 	FINISH_ACCEL();
 
-	gb_tile_config = (R300_ENABLE_TILING | R300_TILE_SIZE_16 | R300_SUBPIXEL_1_16);
+	gb_tile_config = (R300_ENABLE_TILING | R300_TILE_SIZE_16);
 
 	switch(info->accel_state->num_gb_pipes) {
 	case 2: gb_tile_config |= R300_PIPE_COUNT_R300; break;
@@ -105,21 +105,21 @@ static void FUNC_NAME(RADEONInit3DEngine)(ScrnInfoPtr pScrn)
 	OUT_ACCEL_REG(R300_GB_AA_CONFIG, 0);
 	OUT_ACCEL_REG(R300_RB3D_DSTCACHE_CTLSTAT, R300_DC_FLUSH_3D | R300_DC_FREE_3D);
 	OUT_ACCEL_REG(R300_RB3D_ZCACHE_CTLSTAT, R300_ZC_FLUSH | R300_ZC_FREE);
-	OUT_ACCEL_REG(R300_GB_MSPOS0, ((8 << R300_MS_X0_SHIFT) |
-				       (8 << R300_MS_Y0_SHIFT) |
-				       (8 << R300_MS_X1_SHIFT) |
-				       (8 << R300_MS_Y1_SHIFT) |
-				       (8 << R300_MS_X2_SHIFT) |
-				       (8 << R300_MS_Y2_SHIFT) |
-				       (8 << R300_MSBD0_Y_SHIFT) |
-				       (7 << R300_MSBD0_X_SHIFT)));
-	OUT_ACCEL_REG(R300_GB_MSPOS1, ((8 << R300_MS_X3_SHIFT) |
-				       (8 << R300_MS_Y3_SHIFT) |
-				       (8 << R300_MS_X4_SHIFT) |
-				       (8 << R300_MS_Y4_SHIFT) |
-				       (8 << R300_MS_X5_SHIFT) |
-				       (8 << R300_MS_Y5_SHIFT) |
-				       (8 << R300_MSBD1_SHIFT)));
+	OUT_ACCEL_REG(R300_GB_MSPOS0, ((6 << R300_MS_X0_SHIFT) |
+				       (6 << R300_MS_Y0_SHIFT) |
+				       (6 << R300_MS_X1_SHIFT) |
+				       (6 << R300_MS_Y1_SHIFT) |
+				       (6 << R300_MS_X2_SHIFT) |
+				       (6 << R300_MS_Y2_SHIFT) |
+				       (6 << R300_MSBD0_Y_SHIFT) |
+				       (6 << R300_MSBD0_X_SHIFT)));
+	OUT_ACCEL_REG(R300_GB_MSPOS1, ((6 << R300_MS_X3_SHIFT) |
+				       (6 << R300_MS_Y3_SHIFT) |
+				       (6 << R300_MS_X4_SHIFT) |
+				       (6 << R300_MS_Y4_SHIFT) |
+				       (6 << R300_MS_X5_SHIFT) |
+				       (6 << R300_MS_Y5_SHIFT) |
+				       (6 << R300_MSBD1_SHIFT)));
 	FINISH_ACCEL();
 
 	BEGIN_ACCEL(5);
@@ -552,10 +552,10 @@ static void FUNC_NAME(RADEONInit3DEngine)(ScrnInfoPtr pScrn)
 	OUT_ACCEL_REG(R300_SC_EDGERULE, 0xA5294A5);
 	if (IS_R300_3D) {
 	    /* clip has offset 1440 */
-	    OUT_ACCEL_REG(R300_SC_CLIP_0_A, ((1088 << R300_CLIP_X_SHIFT) |
-					     (1088 << R300_CLIP_Y_SHIFT)));
-	    OUT_ACCEL_REG(R300_SC_CLIP_0_B, (((1080 + 2920) << R300_CLIP_X_SHIFT) |
-					     ((1080 + 2920) << R300_CLIP_Y_SHIFT)));
+	    OUT_ACCEL_REG(R300_SC_CLIP_0_A, ((1440 << R300_CLIP_X_SHIFT) |
+					     (1440 << R300_CLIP_Y_SHIFT)));
+	    OUT_ACCEL_REG(R300_SC_CLIP_0_B, ((4080 << R300_CLIP_X_SHIFT) |
+					     (4080 << R300_CLIP_Y_SHIFT)));
 	} else {
 	    OUT_ACCEL_REG(R300_SC_CLIP_0_A, ((0 << R300_CLIP_X_SHIFT) |
 					     (0 << R300_CLIP_Y_SHIFT)));
diff --git a/src/radeon_exa_render.c b/src/radeon_exa_render.c
index 99020a40..8dbbee94 100644
--- a/src/radeon_exa_render.c
+++ b/src/radeon_exa_render.c
@@ -1940,8 +1940,12 @@ static Bool FUNC_NAME(R300PrepareComposite)(int op, PicturePtr pSrcPicture,
 
     /* Clear out scissoring */
     BEGIN_ACCEL(2);
-    OUT_ACCEL_REG(R300_SC_SCISSOR0, ((0 << R300_SCISSOR_X_SHIFT) |
-				     (0 << R300_SCISSOR_Y_SHIFT)));
+    if (IS_R300_3D)
+	OUT_ACCEL_REG(R300_SC_SCISSOR0, ((1440 << R300_SCISSOR_X_SHIFT) |
+					 (1440 << R300_SCISSOR_Y_SHIFT)));
+    else
+	OUT_ACCEL_REG(R300_SC_SCISSOR0, ((0 << R300_SCISSOR_X_SHIFT) |
+					 (0 << R300_SCISSOR_Y_SHIFT)));
     OUT_ACCEL_REG(R300_SC_SCISSOR1, ((8191 << R300_SCISSOR_X_SHIFT) |
 				     (8191 << R300_SCISSOR_Y_SHIFT)));
     FINISH_ACCEL();
diff --git a/src/radeon_textured_videofuncs.c b/src/radeon_textured_videofuncs.c
index 41e99b14..e5a70d1b 100644
--- a/src/radeon_textured_videofuncs.c
+++ b/src/radeon_textured_videofuncs.c
@@ -2272,10 +2272,10 @@ FUNC_NAME(R300DisplayTexturedVideo)(ScrnInfoPtr pScrn, RADEONPortPrivPtr pPriv)
 	 */
 	BEGIN_ACCEL(2);
 	/* R300 has an offset */
-	OUT_ACCEL_REG(R300_SC_SCISSOR0, (((dstX + 1088) << R300_SCISSOR_X_SHIFT) |
-					 ((dstY + 1088) << R300_SCISSOR_Y_SHIFT)));
-	OUT_ACCEL_REG(R300_SC_SCISSOR1, (((dstX + dstw + 1088 - 1) << R300_SCISSOR_X_SHIFT) |
-					 ((dstY + dsth + 1088 - 1) << R300_SCISSOR_Y_SHIFT)));
+	OUT_ACCEL_REG(R300_SC_SCISSOR0, (((dstX + 1440) << R300_SCISSOR_X_SHIFT) |
+					 ((dstY + 1440) << R300_SCISSOR_Y_SHIFT)));
+	OUT_ACCEL_REG(R300_SC_SCISSOR1, (((dstX + dstw + 1440 - 1) << R300_SCISSOR_X_SHIFT) |
+					 ((dstY + dsth + 1440 - 1) << R300_SCISSOR_Y_SHIFT)));
 	FINISH_ACCEL();
 
 #ifdef ACCEL_CP