ps3fb: enhance horizontal panning on firmware 1.90 and up

ps3fb: Enhance horizontal panning on firmware 1.90 and up:
  - On firmware 1.90 and up, L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT supports copying
    rectangles from XDR to DDR memory with different source and destination
    line lengths. Hence larger horizontal virtual resolutions can be supported
    (up to 16368 pixels).
  - As the actual frame buffer memory layout no longer matches the entries in
    ps3fb_res[], create fake struct ps3fb_ioctl_res data for the
    PS3FB_IOCTL_SCREENINFO ioctl, so user space applications that depend on it
    keep on working.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 60 insertions, 41 deletions

diff --git a/drivers/video/ps3fb.c b/drivers/video/ps3fb.c
index 64af173d18f9..b3463ddcfd60 100644
--- a/drivers/video/ps3fb.c
+++ b/drivers/video/ps3fb.c
@@ -55,6 +55,7 @@
 #define GPU_CMD_BUF_SIZE                        (64 * 1024)
 #define GPU_IOIF                                (0x0d000000UL)
 #define GPU_ALIGN_UP(x)                         _ALIGN_UP((x), 64)
+#define GPU_MAX_LINE_LENGTH                     (65536 - 64)
 
 #define PS3FB_FULL_MODE_BIT                     0x80
 
@@ -335,7 +336,7 @@ static int ps3fb_get_res_table(u32 xres, u32 yres, int mode)
 }
 
 static unsigned int ps3fb_find_mode(const struct fb_var_screeninfo *var,
-                                    u32 *line_length)
+                                    u32 *ddr_line_length, u32 *xdr_line_length)
 {
         unsigned int i, mode;
 
@@ -350,19 +351,30 @@ static unsigned int ps3fb_find_mode(const struct fb_var_screeninfo *var,
                     var->upper_margin == ps3fb_modedb[i].upper_margin &&
                     var->lower_margin == ps3fb_modedb[i].lower_margin &&
                     var->sync == ps3fb_modedb[i].sync &&
-                    (var->vmode & FB_VMODE_MASK) == ps3fb_modedb[i].vmode) {
-                        /* Cropped broadcast modes use the full line_length */
-                        *line_length =
-                            ps3fb_modedb[i < 10 ? i + 13 : i].xres * 4;
-                        /* Full broadcast modes have the full mode bit set */
-                        mode = i > 12 ? (i - 12) | PS3FB_FULL_MODE_BIT : i + 1;
-
-                        pr_debug("ps3fb_find_mode: mode %u\n", mode);
-                        return mode;
-                }
+                    (var->vmode & FB_VMODE_MASK) == ps3fb_modedb[i].vmode)
+                        goto found;
 
         pr_debug("ps3fb_find_mode: mode not found\n");
         return 0;
+
+found:
+        /* Cropped broadcast modes use the full line length */
+        *ddr_line_length = ps3fb_modedb[i < 10 ? i + 13 : i].xres * BPP;
+
+        if (ps3_compare_firmware_version(1, 9, 0) >= 0) {
+                *xdr_line_length = GPU_ALIGN_UP(max(var->xres,
+                                                    var->xres_virtual) * BPP);
+                if (*xdr_line_length > GPU_MAX_LINE_LENGTH)
+                        *xdr_line_length = GPU_MAX_LINE_LENGTH;
+        } else
+                *xdr_line_length = *ddr_line_length;
+
+        /* Full broadcast modes have the full mode bit set */
+        mode = i > 12 ? (i - 12) | PS3FB_FULL_MODE_BIT : i + 1;
+
+        pr_debug("ps3fb_find_mode: mode %u\n", mode);
+
+        return mode;
 }
 
 static const struct fb_videomode *ps3fb_default_mode(int id)
@@ -385,9 +397,15 @@ static const struct fb_videomode *ps3fb_default_mode(int id)
 
 static void ps3fb_sync_image(struct device *dev, u64 frame_offset,
                              u64 dst_offset, u64 src_offset, u32 width,
-                             u32 height, u64 line_length)
+                             u32 height, u32 dst_line_length,
+                             u32 src_line_length)
 {
         int status;
+        u64 line_length;
+
+        line_length = dst_line_length;
+        if (src_line_length != dst_line_length)
+                line_length |= (u64)src_line_length << 32;
 
         status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                            L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
@@ -421,8 +439,8 @@ static int ps3fb_sync(struct fb_info *info, u32 frame)
 {
         struct ps3fb_par *par = info->par;
         int i, error = 0;
-        u32 xres, yres;
-        u64 line_length, base;
+        u32 ddr_line_length, xdr_line_length;
+        u64 ddr_base, xdr_base;
 
         acquire_console_sem();
 
@@ -434,15 +452,15 @@ static int ps3fb_sync(struct fb_info *info, u32 frame)
         }
 
         i = par->res_index;
-        xres = ps3fb_res[i].xres;
-        yres = ps3fb_res[i].yres;
-
-        line_length = xres * BPP;
-        base = frame * yres * line_length;
+        xdr_line_length = info->fix.line_length;
+        ddr_line_length = ps3fb_res[i].xres * BPP;
+        xdr_base = frame * info->var.yres_virtual * xdr_line_length;
+        ddr_base = frame * ps3fb_res[i].yres * ddr_line_length;
 
-        ps3fb_sync_image(info->device, base + par->full_offset,
-                         base + par->fb_offset, base + par->pan_offset,
-                         par->width, par->height, line_length);
+        ps3fb_sync_image(info->device, ddr_base + par->full_offset,
+                         ddr_base + par->fb_offset, xdr_base + par->pan_offset,
+                         par->width, par->height, ddr_line_length,
+                         xdr_line_length);
 
 out:
         release_console_sem();
@@ -476,7 +494,7 @@ static int ps3fb_release(struct fb_info *info, int user)
 
 static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 {
-        u32 line_length;
+        u32 xdr_line_length, ddr_line_length;
         int mode;
 
         dev_dbg(info->device, "var->xres:%u info->var.xres:%u\n", var->xres,
@@ -485,7 +503,7 @@ static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
                 info->var.yres);
 
         /* FIXME For now we do exact matches only */
-        mode = ps3fb_find_mode(var, &line_length);
+        mode = ps3fb_find_mode(var, &ddr_line_length, &xdr_line_length);
         if (!mode)
                 return -EINVAL;
 
@@ -495,7 +513,7 @@ static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
         if (var->yres_virtual < var->yres)
                 var->yres_virtual = var->yres;
 
-        if (var->xres_virtual > line_length / BPP) {
+        if (var->xres_virtual > xdr_line_length / BPP) {
                 dev_dbg(info->device,
                         "Horizontal virtual screen size too large\n");
                 return -EINVAL;
@@ -540,7 +558,7 @@ static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
         }
 
         /* Memory limit */
-        if (var->yres_virtual * line_length > ps3fb.xdr_size) {
+        if (var->yres_virtual * xdr_line_length > ps3fb.xdr_size) {
                 dev_dbg(info->device, "Not enough memory\n");
                 return -ENOMEM;
         }
@@ -558,15 +576,16 @@ static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 static int ps3fb_set_par(struct fb_info *info)
 {
         struct ps3fb_par *par = info->par;
-        unsigned int mode, line_length, lines, maxlines;
+        unsigned int mode, ddr_line_length, xdr_line_length, lines, maxlines;
         int i;
-        unsigned long offset, dst;
+        unsigned long offset;
+        u64 dst;
 
         dev_dbg(info->device, "xres:%d xv:%d yres:%d yv:%d clock:%d\n",
                 info->var.xres, info->var.xres_virtual,
                 info->var.yres, info->var.yres_virtual, info->var.pixclock);
 
-        mode = ps3fb_find_mode(&info->var, &line_length);
+        mode = ps3fb_find_mode(&info->var, &ddr_line_length, &xdr_line_length);
         if (!mode)
                 return -EINVAL;
 
@@ -577,12 +596,13 @@ static int ps3fb_set_par(struct fb_info *info)
         info->fix.smem_len = ps3fb.xdr_size;
         info->fix.xpanstep = info->var.xres_virtual > info->var.xres ? 1 : 0;
         info->fix.ypanstep = info->var.yres_virtual > info->var.yres ? 1 : 0;
-        info->fix.line_length = line_length;
+        info->fix.line_length = xdr_line_length;
 
         info->screen_base = (char __iomem *)ps3fb.xdr_ea;
 
-        par->num_frames = info->fix.smem_len/
-                          (ps3fb_res[i].xres*ps3fb_res[i].yres*BPP);
+        par->num_frames = ps3fb.xdr_size /
+                          max(ps3fb_res[i].yres * ddr_line_length,
+                              info->var.yres_virtual * xdr_line_length);
 
         /* Keep the special bits we cannot set using fb_var_screeninfo */
         par->new_mode_id = (par->new_mode_id & ~PS3AV_MODE_MASK) | mode;
@@ -592,7 +612,7 @@ static int ps3fb_set_par(struct fb_info *info)
         offset = VP_OFF(i);
         par->fb_offset = GPU_ALIGN_UP(offset);
         par->full_offset = par->fb_offset - offset;
-        par->pan_offset = info->var.yoffset * line_length +
+        par->pan_offset = info->var.yoffset * xdr_line_length +
                           info->var.xoffset * BPP;
 
         if (par->new_mode_id != par->mode_id) {
@@ -610,11 +630,11 @@ static int ps3fb_set_par(struct fb_info *info)
         lines = ps3fb_res[i].yres * par->num_frames;
         if (par->full_offset)
                 lines++;
-        maxlines = ps3fb.xdr_size / line_length;
-        for (dst = 0; lines; dst += maxlines * line_length) {
+        maxlines = ps3fb.xdr_size / ddr_line_length;
+        for (dst = 0; lines; dst += maxlines * ddr_line_length) {
                 unsigned int l = min(lines, maxlines);
                 ps3fb_sync_image(info->device, 0, dst, 0, ps3fb_res[i].xres, l,
-                                 line_length);
+                                 ddr_line_length, ddr_line_length);
                 lines -= l;
         }
 
@@ -816,12 +836,11 @@ static int ps3fb_ioctl(struct fb_info *info, unsigned int cmd,
                 {
                         struct ps3fb_par *par = info->par;
                         struct ps3fb_ioctl_res res;
-                        int i = par->res_index;
                         dev_dbg(info->device, "PS3FB_IOCTL_SCREENINFO:\n");
-                        res.xres = ps3fb_res[i].xres;
-                        res.yres = ps3fb_res[i].yres;
-                        res.xoff = ps3fb_res[i].xoff;
-                        res.yoff = ps3fb_res[i].yoff;
+                        res.xres = info->fix.line_length / BPP;
+                        res.yres = info->var.yres_virtual;
+                        res.xoff = (res.xres - info->var.xres) / 2;
+                        res.yoff = (res.yres - info->var.yres) / 2;
                         res.num_frames = par->num_frames;
                         if (!copy_to_user(argp, &res, sizeof(res)))
                                 retval = 0;