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path: root/drivers/video/fbdev/kyro/STG4000OverlayDevice.c
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Diffstat (limited to 'drivers/video/fbdev/kyro/STG4000OverlayDevice.c')
-rw-r--r--drivers/video/fbdev/kyro/STG4000OverlayDevice.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/drivers/video/fbdev/kyro/STG4000OverlayDevice.c b/drivers/video/fbdev/kyro/STG4000OverlayDevice.c
new file mode 100644
index 000000000..0aeeaa107
--- /dev/null
+++ b/drivers/video/fbdev/kyro/STG4000OverlayDevice.c
@@ -0,0 +1,601 @@
+/*
+ * linux/drivers/video/kyro/STG4000OverlayDevice.c
+ *
+ * Copyright (C) 2000 Imagination Technologies Ltd
+ * Copyright (C) 2002 STMicroelectronics
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+
+#include "STG4000Reg.h"
+#include "STG4000Interface.h"
+
+/* HW Defines */
+
+#define STG4000_NO_SCALING 0x800
+#define STG4000_NO_DECIMATION 0xFFFFFFFF
+
+/* Primary surface */
+#define STG4000_PRIM_NUM_PIX 5
+#define STG4000_PRIM_ALIGN 4
+#define STG4000_PRIM_ADDR_BITS 20
+
+#define STG4000_PRIM_MIN_WIDTH 640
+#define STG4000_PRIM_MAX_WIDTH 1600
+#define STG4000_PRIM_MIN_HEIGHT 480
+#define STG4000_PRIM_MAX_HEIGHT 1200
+
+/* Overlay surface */
+#define STG4000_OVRL_NUM_PIX 4
+#define STG4000_OVRL_ALIGN 2
+#define STG4000_OVRL_ADDR_BITS 20
+#define STG4000_OVRL_NUM_MODES 5
+
+#define STG4000_OVRL_MIN_WIDTH 0
+#define STG4000_OVRL_MAX_WIDTH 720
+#define STG4000_OVRL_MIN_HEIGHT 0
+#define STG4000_OVRL_MAX_HEIGHT 576
+
+/* Decimation and Scaling */
+static u32 adwDecim8[33] = {
+ 0xffffffff, 0xfffeffff, 0xffdffbff, 0xfefefeff, 0xfdf7efbf,
+ 0xfbdf7bdf, 0xf7bbddef, 0xeeeeeeef, 0xeeddbb77, 0xedb76db7,
+ 0xdb6db6db, 0xdb5b5b5b, 0xdab5ad6b, 0xd5ab55ab, 0xd555aaab,
+ 0xaaaaaaab, 0xaaaa5555, 0xaa952a55, 0xa94a5295, 0xa5252525,
+ 0xa4924925, 0x92491249, 0x91224489, 0x91111111, 0x90884211,
+ 0x88410821, 0x88102041, 0x81010101, 0x80800801, 0x80010001,
+ 0x80000001, 0x00000001, 0x00000000
+};
+
+typedef struct _OVRL_SRC_DEST {
+ /*clipped on-screen pixel position of overlay */
+ u32 ulDstX1;
+ u32 ulDstY1;
+ u32 ulDstX2;
+ u32 ulDstY2;
+
+ /*clipped pixel pos of source data within buffer thses need to be 128 bit word aligned */
+ u32 ulSrcX1;
+ u32 ulSrcY1;
+ u32 ulSrcX2;
+ u32 ulSrcY2;
+
+ /* on-screen pixel position of overlay */
+ s32 lDstX1;
+ s32 lDstY1;
+ s32 lDstX2;
+ s32 lDstY2;
+} OVRL_SRC_DEST;
+
+static u32 ovlWidth, ovlHeight, ovlStride;
+static int ovlLinear;
+
+void ResetOverlayRegisters(volatile STG4000REG __iomem *pSTGReg)
+{
+ u32 tmp;
+
+ /* Set Overlay address to default */
+ tmp = STG_READ_REG(DACOverlayAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ CLEAR_BIT(31);
+ STG_WRITE_REG(DACOverlayAddr, tmp);
+
+ /* Set Overlay U address */
+ tmp = STG_READ_REG(DACOverlayUAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ STG_WRITE_REG(DACOverlayUAddr, tmp);
+
+ /* Set Overlay V address */
+ tmp = STG_READ_REG(DACOverlayVAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ STG_WRITE_REG(DACOverlayVAddr, tmp);
+
+ /* Set Overlay Size */
+ tmp = STG_READ_REG(DACOverlaySize);
+ CLEAR_BITS_FRM_TO(0, 10);
+ CLEAR_BITS_FRM_TO(12, 31);
+ STG_WRITE_REG(DACOverlaySize, tmp);
+
+ /* Set Overlay Vt Decimation */
+ tmp = STG4000_NO_DECIMATION;
+ STG_WRITE_REG(DACOverlayVtDec, tmp);
+
+ /* Set Overlay format to default value */
+ tmp = STG_READ_REG(DACPixelFormat);
+ CLEAR_BITS_FRM_TO(4, 7);
+ CLEAR_BITS_FRM_TO(16, 22);
+ STG_WRITE_REG(DACPixelFormat, tmp);
+
+ /* Set Vertical scaling to default */
+ tmp = STG_READ_REG(DACVerticalScal);
+ CLEAR_BITS_FRM_TO(0, 11);
+ CLEAR_BITS_FRM_TO(16, 22);
+ tmp |= STG4000_NO_SCALING; /* Set to no scaling */
+ STG_WRITE_REG(DACVerticalScal, tmp);
+
+ /* Set Horizontal Scaling to default */
+ tmp = STG_READ_REG(DACHorizontalScal);
+ CLEAR_BITS_FRM_TO(0, 11);
+ CLEAR_BITS_FRM_TO(16, 17);
+ tmp |= STG4000_NO_SCALING; /* Set to no scaling */
+ STG_WRITE_REG(DACHorizontalScal, tmp);
+
+ /* Set Blend mode to Alpha Blend */
+ /* ????? SG 08/11/2001 Surely this isn't the alpha blend mode,
+ hopefully its overwrite
+ */
+ tmp = STG_READ_REG(DACBlendCtrl);
+ CLEAR_BITS_FRM_TO(0, 30);
+ tmp = (GRAPHICS_MODE << 28);
+ STG_WRITE_REG(DACBlendCtrl, tmp);
+
+}
+
+int CreateOverlaySurface(volatile STG4000REG __iomem *pSTGReg,
+ u32 inWidth,
+ u32 inHeight,
+ int bLinear,
+ u32 ulOverlayOffset,
+ u32 * retStride, u32 * retUVStride)
+{
+ u32 tmp;
+ u32 ulStride;
+
+ if (inWidth > STG4000_OVRL_MAX_WIDTH ||
+ inHeight > STG4000_OVRL_MAX_HEIGHT) {
+ return -EINVAL;
+ }
+
+ /* Stride in 16 byte words - 16Bpp */
+ if (bLinear) {
+ /* Format is 16bits so num 16 byte words is width/8 */
+ if ((inWidth & 0x7) == 0) { /* inWidth % 8 */
+ ulStride = (inWidth / 8);
+ } else {
+ /* Round up to next 16byte boundary */
+ ulStride = ((inWidth + 8) / 8);
+ }
+ } else {
+ /* Y component is 8bits so num 16 byte words is width/16 */
+ if ((inWidth & 0xf) == 0) { /* inWidth % 16 */
+ ulStride = (inWidth / 16);
+ } else {
+ /* Round up to next 16byte boundary */
+ ulStride = ((inWidth + 16) / 16);
+ }
+ }
+
+
+ /* Set Overlay address and Format mode */
+ tmp = STG_READ_REG(DACOverlayAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ if (bLinear) {
+ CLEAR_BIT(31); /* Overlay format to Linear */
+ } else {
+ tmp |= SET_BIT(31); /* Overlay format to Planer */
+ }
+
+ /* Only bits 24:4 of the Overlay address */
+ tmp |= (ulOverlayOffset >> 4);
+ STG_WRITE_REG(DACOverlayAddr, tmp);
+
+ if (!bLinear) {
+ u32 uvSize =
+ (inWidth & 0x1) ? (inWidth + 1 / 2) : (inWidth / 2);
+ u32 uvStride;
+ u32 ulOffset;
+ /* Y component is 8bits so num 32 byte words is width/32 */
+ if ((uvSize & 0xf) == 0) { /* inWidth % 16 */
+ uvStride = (uvSize / 16);
+ } else {
+ /* Round up to next 32byte boundary */
+ uvStride = ((uvSize + 16) / 16);
+ }
+
+ ulOffset = ulOverlayOffset + (inHeight * (ulStride * 16));
+ /* Align U,V data to 32byte boundary */
+ if ((ulOffset & 0x1f) != 0)
+ ulOffset = (ulOffset + 32L) & 0xffffffE0L;
+
+ tmp = STG_READ_REG(DACOverlayUAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ tmp |= (ulOffset >> 4);
+ STG_WRITE_REG(DACOverlayUAddr, tmp);
+
+ ulOffset += (inHeight / 2) * (uvStride * 16);
+ /* Align U,V data to 32byte boundary */
+ if ((ulOffset & 0x1f) != 0)
+ ulOffset = (ulOffset + 32L) & 0xffffffE0L;
+
+ tmp = STG_READ_REG(DACOverlayVAddr);
+ CLEAR_BITS_FRM_TO(0, 20);
+ tmp |= (ulOffset >> 4);
+ STG_WRITE_REG(DACOverlayVAddr, tmp);
+
+ *retUVStride = uvStride * 16;
+ }
+
+
+ /* Set Overlay YUV pixel format
+ * Make sure that LUT not used - ??????
+ */
+ tmp = STG_READ_REG(DACPixelFormat);
+ /* Only support Planer or UYVY linear formats */
+ CLEAR_BITS_FRM_TO(4, 9);
+ STG_WRITE_REG(DACPixelFormat, tmp);
+
+ ovlWidth = inWidth;
+ ovlHeight = inHeight;
+ ovlStride = ulStride;
+ ovlLinear = bLinear;
+ *retStride = ulStride << 4; /* In bytes */
+
+ return 0;
+}
+
+int SetOverlayBlendMode(volatile STG4000REG __iomem *pSTGReg,
+ OVRL_BLEND_MODE mode,
+ u32 ulAlpha, u32 ulColorKey)
+{
+ u32 tmp;
+
+ tmp = STG_READ_REG(DACBlendCtrl);
+ CLEAR_BITS_FRM_TO(28, 30);
+ tmp |= (mode << 28);
+
+ switch (mode) {
+ case COLOR_KEY:
+ CLEAR_BITS_FRM_TO(0, 23);
+ tmp |= (ulColorKey & 0x00FFFFFF);
+ break;
+
+ case GLOBAL_ALPHA:
+ CLEAR_BITS_FRM_TO(24, 27);
+ tmp |= ((ulAlpha & 0xF) << 24);
+ break;
+
+ case CK_PIXEL_ALPHA:
+ CLEAR_BITS_FRM_TO(0, 23);
+ tmp |= (ulColorKey & 0x00FFFFFF);
+ break;
+
+ case CK_GLOBAL_ALPHA:
+ CLEAR_BITS_FRM_TO(0, 23);
+ tmp |= (ulColorKey & 0x00FFFFFF);
+ CLEAR_BITS_FRM_TO(24, 27);
+ tmp |= ((ulAlpha & 0xF) << 24);
+ break;
+
+ case GRAPHICS_MODE:
+ case PER_PIXEL_ALPHA:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ STG_WRITE_REG(DACBlendCtrl, tmp);
+
+ return 0;
+}
+
+void EnableOverlayPlane(volatile STG4000REG __iomem *pSTGReg)
+{
+ u32 tmp;
+ /* Enable Overlay */
+ tmp = STG_READ_REG(DACPixelFormat);
+ tmp |= SET_BIT(7);
+ STG_WRITE_REG(DACPixelFormat, tmp);
+
+ /* Set video stream control */
+ tmp = STG_READ_REG(DACStreamCtrl);
+ tmp |= SET_BIT(1); /* video stream */
+ STG_WRITE_REG(DACStreamCtrl, tmp);
+}
+
+static u32 Overlap(u32 ulBits, u32 ulPattern)
+{
+ u32 ulCount = 0;
+
+ while (ulBits) {
+ if (!(ulPattern & 1))
+ ulCount++;
+ ulBits--;
+ ulPattern = ulPattern >> 1;
+ }
+
+ return ulCount;
+
+}
+
+int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg,
+ u32 left, u32 top,
+ u32 right, u32 bottom)
+{
+ OVRL_SRC_DEST srcDest;
+
+ u32 ulSrcTop, ulSrcBottom;
+ u32 ulSrc, ulDest;
+ u32 ulFxScale, ulFxOffset;
+ u32 ulHeight, ulWidth;
+ u32 ulPattern;
+ u32 ulDecimate, ulDecimated;
+ u32 ulApplied;
+ u32 ulDacXScale, ulDacYScale;
+ u32 ulScale;
+ u32 ulLeft, ulRight;
+ u32 ulSrcLeft, ulSrcRight;
+ u32 ulScaleLeft, ulScaleRight;
+ u32 ulhDecim;
+ u32 ulsVal;
+ u32 ulVertDecFactor;
+ int bResult;
+ u32 ulClipOff = 0;
+ u32 ulBits = 0;
+ u32 ulsAdd = 0;
+ u32 tmp, ulStride;
+ u32 ulExcessPixels, ulClip, ulExtraLines;
+
+
+ srcDest.ulSrcX1 = 0;
+ srcDest.ulSrcY1 = 0;
+ srcDest.ulSrcX2 = ovlWidth - 1;
+ srcDest.ulSrcY2 = ovlHeight - 1;
+
+ srcDest.ulDstX1 = left;
+ srcDest.ulDstY1 = top;
+ srcDest.ulDstX2 = right;
+ srcDest.ulDstY2 = bottom;
+
+ srcDest.lDstX1 = srcDest.ulDstX1;
+ srcDest.lDstY1 = srcDest.ulDstY1;
+ srcDest.lDstX2 = srcDest.ulDstX2;
+ srcDest.lDstY2 = srcDest.ulDstY2;
+
+ /************* Vertical decimation/scaling ******************/
+
+ /* Get Src Top and Bottom */
+ ulSrcTop = srcDest.ulSrcY1;
+ ulSrcBottom = srcDest.ulSrcY2;
+
+ ulSrc = ulSrcBottom - ulSrcTop;
+ ulDest = srcDest.lDstY2 - srcDest.lDstY1; /* on-screen overlay */
+
+ if (ulSrc <= 1)
+ return -EINVAL;
+
+ /* First work out the position we are to display as offset from the
+ * source of the buffer
+ */
+ ulFxScale = (ulDest << 11) / ulSrc; /* fixed point scale factor */
+ ulFxOffset = (srcDest.lDstY2 - srcDest.ulDstY2) << 11;
+
+ ulSrcBottom = ulSrcBottom - (ulFxOffset / ulFxScale);
+ ulSrc = ulSrcBottom - ulSrcTop;
+ ulHeight = ulSrc;
+
+ ulDest = srcDest.ulDstY2 - (srcDest.ulDstY1 - 1);
+ ulPattern = adwDecim8[ulBits];
+
+ /* At this point ulSrc represents the input decimator */
+ if (ulSrc > ulDest) {
+ ulDecimate = ulSrc - ulDest;
+ ulBits = 0;
+ ulApplied = ulSrc / 32;
+
+ while (((ulBits * ulApplied) +
+ Overlap((ulSrc % 32),
+ adwDecim8[ulBits])) < ulDecimate)
+ ulBits++;
+
+ ulPattern = adwDecim8[ulBits];
+ ulDecimated =
+ (ulBits * ulApplied) + Overlap((ulSrc % 32),
+ ulPattern);
+ ulSrc = ulSrc - ulDecimated; /* the number number of lines that will go into the scaler */
+ }
+
+ if (ulBits && (ulBits != 32)) {
+ ulVertDecFactor = (63 - ulBits) / (32 - ulBits); /* vertical decimation factor scaled up to nearest integer */
+ } else {
+ ulVertDecFactor = 1;
+ }
+
+ ulDacYScale = ((ulSrc - 1) * 2048) / (ulDest + 1);
+
+ tmp = STG_READ_REG(DACOverlayVtDec); /* Decimation */
+ CLEAR_BITS_FRM_TO(0, 31);
+ tmp = ulPattern;
+ STG_WRITE_REG(DACOverlayVtDec, tmp);
+
+ /***************** Horizontal decimation/scaling ***************************/
+
+ /*
+ * Now we handle the horizontal case, this is a simplified version of
+ * the vertical case in that we decimate by factors of 2. as we are
+ * working in words we should always be able to decimate by these
+ * factors. as we always have to have a buffer which is aligned to a
+ * whole number of 128 bit words, we must align the left side to the
+ * lowest to the next lowest 128 bit boundary, and the right hand edge
+ * to the next largets boundary, (in a similar way to how we didi it in
+ * PMX1) as the left and right hand edges are aligned to these
+ * boundaries normally this only becomes an issue when we are chopping
+ * of one of the sides We shall work out vertical stuff first
+ */
+ ulSrc = srcDest.ulSrcX2 - srcDest.ulSrcX1;
+ ulDest = srcDest.lDstX2 - srcDest.lDstX1;
+#ifdef _OLDCODE
+ ulLeft = srcDest.ulDstX1;
+ ulRight = srcDest.ulDstX2;
+#else
+ if (srcDest.ulDstX1 > 2) {
+ ulLeft = srcDest.ulDstX1 + 2;
+ ulRight = srcDest.ulDstX2 + 1;
+ } else {
+ ulLeft = srcDest.ulDstX1;
+ ulRight = srcDest.ulDstX2 + 1;
+ }
+#endif
+ /* first work out the position we are to display as offset from the source of the buffer */
+ bResult = 1;
+
+ do {
+ if (ulDest == 0)
+ return -EINVAL;
+
+ /* source pixels per dest pixel <<11 */
+ ulFxScale = ((ulSrc - 1) << 11) / (ulDest);
+
+ /* then number of destination pixels out we are */
+ ulFxOffset = ulFxScale * ((srcDest.ulDstX1 - srcDest.lDstX1) + ulClipOff);
+ ulFxOffset >>= 11;
+
+ /* this replaces the code which was making a decision as to use either ulFxOffset or ulSrcX1 */
+ ulSrcLeft = srcDest.ulSrcX1 + ulFxOffset;
+
+ /* then number of destination pixels out we are */
+ ulFxOffset = ulFxScale * (srcDest.lDstX2 - srcDest.ulDstX2);
+ ulFxOffset >>= 11;
+
+ ulSrcRight = srcDest.ulSrcX2 - ulFxOffset;
+
+ /*
+ * we must align these to our 128 bit boundaries. we shall
+ * round down the pixel pos to the nearest 8 pixels.
+ */
+ ulScaleLeft = ulSrcLeft;
+ ulScaleRight = ulSrcRight;
+
+ /* shift fxscale until it is in the range of the scaler */
+ ulhDecim = 0;
+ ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2);
+
+ while (ulScale > 0x800) {
+ ulhDecim++;
+ ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2);
+ }
+
+ /*
+ * to try and get the best values We first try and use
+ * src/dwdest for the scale factor, then we move onto src-1
+ *
+ * we want to check to see if we will need to clip data, if so
+ * then we should clip our source so that we don't need to
+ */
+ if (!ovlLinear) {
+ ulSrcLeft &= ~0x1f;
+
+ /*
+ * we must align the right hand edge to the next 32
+ * pixel` boundary, must be on a 256 boundary so u, and
+ * v are 128 bit aligned
+ */
+ ulSrcRight = (ulSrcRight + 0x1f) & ~0x1f;
+ } else {
+ ulSrcLeft &= ~0x7;
+
+ /*
+ * we must align the right hand edge to the next
+ * 8pixel` boundary
+ */
+ ulSrcRight = (ulSrcRight + 0x7) & ~0x7;
+ }
+
+ /* this is the input size line store needs to cope with */
+ ulWidth = ulSrcRight - ulSrcLeft;
+
+ /*
+ * use unclipped value to work out scale factror this is the
+ * scale factor we want we shall now work out the horizonal
+ * decimation and scaling
+ */
+ ulsVal = ((ulWidth / 8) >> ulhDecim);
+
+ if ((ulWidth != (ulsVal << ulhDecim) * 8))
+ ulsAdd = 1;
+
+ /* input pixels to scaler; */
+ ulSrc = ulWidth >> ulhDecim;
+
+ if (ulSrc <= 2)
+ return -EINVAL;
+
+ ulExcessPixels = ((((ulScaleLeft - ulSrcLeft)) << (11 - ulhDecim)) / ulScale);
+
+ ulClip = (ulSrc << 11) / ulScale;
+ ulClip -= (ulRight - ulLeft);
+ ulClip += ulExcessPixels;
+
+ if (ulClip)
+ ulClip--;
+
+ /* We may need to do more here if we really have a HW rev < 5 */
+ } while (!bResult);
+
+ ulExtraLines = (1 << ulhDecim) * ulVertDecFactor;
+ ulExtraLines += 64;
+ ulHeight += ulExtraLines;
+
+ ulDacXScale = ulScale;
+
+
+ tmp = STG_READ_REG(DACVerticalScal);
+ CLEAR_BITS_FRM_TO(0, 11);
+ CLEAR_BITS_FRM_TO(16, 22); /* Vertical Scaling */
+
+ /* Calculate new output line stride, this is always the number of 422
+ words in the line buffer, so it doesn't matter if the
+ mode is 420. Then set the vertical scale register.
+ */
+ ulStride = (ulWidth >> (ulhDecim + 3)) + ulsAdd;
+ tmp |= ((ulStride << 16) | (ulDacYScale)); /* DAC_LS_CTRL = stride */
+ STG_WRITE_REG(DACVerticalScal, tmp);
+
+ /* Now set up the overlay size using the modified width and height
+ from decimate and scaling calculations
+ */
+ tmp = STG_READ_REG(DACOverlaySize);
+ CLEAR_BITS_FRM_TO(0, 10);
+ CLEAR_BITS_FRM_TO(12, 31);
+
+ if (ovlLinear) {
+ tmp |=
+ (ovlStride | ((ulHeight + 1) << 12) |
+ (((ulWidth / 8) - 1) << 23));
+ } else {
+ tmp |=
+ (ovlStride | ((ulHeight + 1) << 12) |
+ (((ulWidth / 32) - 1) << 23));
+ }
+
+ STG_WRITE_REG(DACOverlaySize, tmp);
+
+ /* Set Video Window Start */
+ tmp = ((ulLeft << 16)) | (srcDest.ulDstY1);
+ STG_WRITE_REG(DACVidWinStart, tmp);
+
+ /* Set Video Window End */
+ tmp = ((ulRight) << 16) | (srcDest.ulDstY2);
+ STG_WRITE_REG(DACVidWinEnd, tmp);
+
+ /* Finally set up the rest of the overlay regs in the order
+ done in the IMG driver
+ */
+ tmp = STG_READ_REG(DACPixelFormat);
+ tmp = ((ulExcessPixels << 16) | tmp) & 0x7fffffff;
+ STG_WRITE_REG(DACPixelFormat, tmp);
+
+ tmp = STG_READ_REG(DACHorizontalScal);
+ CLEAR_BITS_FRM_TO(0, 11);
+ CLEAR_BITS_FRM_TO(16, 17);
+ tmp |= ((ulhDecim << 16) | (ulDacXScale));
+ STG_WRITE_REG(DACHorizontalScal, tmp);
+
+ return 0;
+}