RandR rotation implemented.

* I added the configuration file option "RandRRotation".
* I replaced pSmi->ShadowPitch with pSmi->screenStride, it seems it
   makes more sense because the lower word of ShadowPitch may change
   independently.
* I moved the SMI_DEDataFormat to smi_accel.c because it seems it is
  a piece of code repeated many times in the driver.
* At some places, it is assumed the framebuffer is at FBOffset:
  when using a shadow framebuffer, FBOffset is the location of the
  on-screen framebuffer (0 should be used). This made e.g. EXA
  completly useless with ShadowFB enabled (it crashed).
* In the FBManager initialization, I have replaced xf86InitFBManager
  with xf86InitFBManagerRegion to reserve some additional space as
  screen fb: it's unlikely to be the case, but a less efficient
  alignment in the rotated mode could make the rotated mode need more
  memory than the unrotated one.
  This is not a problem with EXA as the offscreen memory parameters
  can be easily modified when doing the rotation.
* In SMI_RefreshArea it's assumed that some DE registers are already
  in some state, this is specially not true when using EXA.
* SMI_ValidMode rejects a rotated mode with different dimensions
  than the panel. This seems to work now.

Signed-off-by: Paulo Cesar Pereira de Andrade <pcpa@mandriva.com.br>

1 files changed, 32 insertions, 20 deletions

diff --git a/src/smi_accel.c b/src/smi_accel.c
index 5cdadc0..750b896 100644
--- a/src/smi_accel.c
+++ b/src/smi_accel.c
@@ -83,24 +83,10 @@ SMI_EngineReset(ScrnInfoPtr pScrn)
 
     ENTER_PROC("SMI_EngineReset");
 
-    pSmi->Stride = (pSmi->width * pSmi->Bpp + 15) & ~15;
-
-    switch (pScrn->bitsPerPixel) {
-    case 8:
-	DEDataFormat = 0x00000000;
-	break;
-    case 16:
-	pSmi->Stride >>= 1;
-	DEDataFormat = 0x00100000;
-	break;
-    case 24:
-	DEDataFormat = 0x00300000;
-	break;
-    case 32:
-	pSmi->Stride >>= 2;
-	DEDataFormat = 0x00200000;
-	break;
-    }
+    pSmi->Stride = ((pSmi->width * pSmi->Bpp + 15) & ~15) / pSmi->Bpp;
+    if(pScrn->bitsPerPixel==24)
+       pSmi->Stride *= 3;
+    DEDataFormat = SMI_DEDataFormat(pScrn->bitsPerPixel);
 
     for (i = 0; i < sizeof(xyAddress) / sizeof(xyAddress[0]); i++) {
 	if (pSmi->rotate) {
@@ -122,8 +108,13 @@ SMI_EngineReset(ScrnInfoPtr pScrn)
     WRITE_DPR(pSmi, 0x24, 0xFFFFFFFF);
     WRITE_DPR(pSmi, 0x28, 0xFFFFFFFF);
     WRITE_DPR(pSmi, 0x3C, (pSmi->Stride << 16) | pSmi->Stride);
-    WRITE_DPR(pSmi, 0x40, pSmi->FBOffset >> 3);
-    WRITE_DPR(pSmi, 0x44, pSmi->FBOffset >> 3);
+    if(pSmi->shadowFB){
+       WRITE_DPR(pSmi, 0x40, 0);
+       WRITE_DPR(pSmi, 0x44, 0);  /* The shadow framebuffer is located at offset 0 */
+    }else{
+       WRITE_DPR(pSmi, 0x40, pSmi->FBOffset >> 3);
+       WRITE_DPR(pSmi, 0x44, pSmi->FBOffset >> 3);
+    }
 
     SMI_DisableClipping(pScrn);
 
@@ -200,3 +191,24 @@ SMI_DisableClipping(ScrnInfoPtr pScrn)
     LEAVE_PROC("SMI_DisableClipping");
 }
 
+CARD32
+SMI_DEDataFormat(int bpp) {
+    CARD32 DEDataFormat = 0;
+
+    switch (bpp) {
+    case 8:
+	DEDataFormat = 0x00000000;
+	break;
+    case 16:
+	DEDataFormat = 0x00100000;
+	break;
+    case 24:
+	DEDataFormat = 0x00300000;
+	break;
+    case 32:
+	DEDataFormat = 0x00200000;
+	break;
+    }
+    return DEDataFormat;
+}
+