forked from luck/tmp_suning_uos_patched
video: sh_mobile_lcdcfb: Fix panning.
Fixed SH-Mobile panning. Previously the address of the frame to be displayed was updated in the VSync end interrupt. This meant there was a minimum of 1 frame bewteen calling FBIOPAN_DISPLAY ioctl and the pan occuring. This meant that apps were not able to use the FBIO_WAITFORVSYNC ioctl to wait for the pan to complete. This patch moves the write to LDSA1R mirror reg into the pan ioctl. Tested on MS7724 board against 2.6.33-rc7 Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -124,7 +124,6 @@ struct sh_mobile_lcdc_chan {
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struct scatterlist *sglist;
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unsigned long frame_end;
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unsigned long pan_offset;
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unsigned long new_pan_offset;
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wait_queue_head_t frame_end_wait;
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struct completion vsync_completion;
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};
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@ -369,21 +368,6 @@ static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
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}
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/* VSYNC End */
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if ((ldintr & LDINTR_VES) &&
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(ch->pan_offset != ch->new_pan_offset)) {
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unsigned long ldrcntr = lcdc_read(priv, _LDRCNTR);
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/* Set the source address for the next refresh */
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lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle +
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ch->new_pan_offset);
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if (lcdc_chan_is_sublcd(ch))
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lcdc_write(ch->lcdc, _LDRCNTR,
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ldrcntr ^ LDRCNTR_SRS);
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else
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lcdc_write(ch->lcdc, _LDRCNTR,
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ldrcntr ^ LDRCNTR_MRS);
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ch->pan_offset = ch->new_pan_offset;
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}
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if (ldintr & LDINTR_VES)
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complete(&ch->vsync_completion);
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}
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@ -774,21 +758,28 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct sh_mobile_lcdc_chan *ch = info->par;
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struct sh_mobile_lcdc_priv *priv = ch->lcdc;
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unsigned long ldrcntr;
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unsigned long new_pan_offset;
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if (info->var.xoffset == var->xoffset &&
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info->var.yoffset == var->yoffset)
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return 0; /* No change, do nothing */
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ch->new_pan_offset = (var->yoffset * info->fix.line_length) +
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new_pan_offset = (var->yoffset * info->fix.line_length) +
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(var->xoffset * (info->var.bits_per_pixel / 8));
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if (ch->new_pan_offset != ch->pan_offset) {
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unsigned long ldintr;
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ldintr = lcdc_read(ch->lcdc, _LDINTR);
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ldintr |= LDINTR_VEE;
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lcdc_write(ch->lcdc, _LDINTR, ldintr);
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sh_mobile_lcdc_deferred_io_touch(info);
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}
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if (new_pan_offset == ch->pan_offset)
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return 0; /* No change, do nothing */
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ldrcntr = lcdc_read(priv, _LDRCNTR);
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/* Set the source address for the next refresh */
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lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
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if (lcdc_chan_is_sublcd(ch))
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lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
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else
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lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
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ch->pan_offset = new_pan_offset;
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sh_mobile_lcdc_deferred_io_touch(info);
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return 0;
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}
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@ -1009,7 +1000,6 @@ static int __init sh_mobile_lcdc_probe(struct platform_device *pdev)
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init_waitqueue_head(&priv->ch[i].frame_end_wait);
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init_completion(&priv->ch[i].vsync_completion);
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priv->ch[j].pan_offset = 0;
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priv->ch[j].new_pan_offset = 0;
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switch (pdata->ch[i].chan) {
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case LCDC_CHAN_MAINLCD:
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