On 12/19/2011 10:39 PM, Ondrej Zary wrote:
> Add memory size detection for Virge/VX and small delay in mode setting (same
> as in X.org driver) to fix blank screen problem.
>
> Also adjust DTPC position to fix garbled screen in some modes (tested that
> this adjustment does not break other cards - at least Trio32, Trio64V+,
> Trio64V2/DX, Virge, Virge/DX).
>
> Tested on ELSA Winner 2000AVI/3D.
>
> Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
Applied.
Thanks,
Florian Tobias Schandinat
>
> --- linux-3.1-orig/drivers/video/s3fb.c 2011-10-24 09:10:05.000000000 +0200
> +++ linux-3.1/drivers/video/s3fb.c 2011-12-19 23:28:34.000000000 +0100
> @@ -727,7 +727,7 @@
> if (par->chip == CHIP_988_VIRGE_VX) {
> vga_wcrt(par->state.vgabase, 0x50, 0x00);
> vga_wcrt(par->state.vgabase, 0x67, 0x50);
> -
> + msleep(10); /* screen remains blank sometimes without this */
> vga_wcrt(par->state.vgabase, 0x63, (mode <= 2) ? 0x90 : 0x09);
> vga_wcrt(par->state.vgabase, 0x66, 0x90);
> }
> @@ -901,7 +901,8 @@
>
> /* Set Data Transfer Position */
> hsstart = ((info->var.xres + info->var.right_margin) * hmul) / 8;
> - value = clamp((htotal + hsstart + 1) / 2, hsstart + 4, htotal + 1);
> + /* + 2 is needed for Virge/VX, does no harm on other cards */
> + value = clamp((htotal + hsstart + 1) / 2 + 2, hsstart + 4, htotal + 1);
> svga_wcrt_multi(par->state.vgabase, s3_dtpc_regs, value);
>
> memset_io(info->screen_base, 0x00, screen_size);
> @@ -1215,6 +1216,31 @@
> info->screen_size = 2 << 20;
> break;
> }
> + } else if (par->chip == CHIP_988_VIRGE_VX) {
> + switch ((regval & 0x60) >> 5) {
> + case 0: /* 2MB */
> + info->screen_size = 2 << 20;
> + break;
> + case 1: /* 4MB */
> + info->screen_size = 4 << 20;
> + break;
> + case 2: /* 6MB */
> + info->screen_size = 6 << 20;
> + break;
> + case 3: /* 8MB */
> + info->screen_size = 8 << 20;
> + break;
> + }
> + /* off-screen memory */
> + regval = vga_rcrt(par->state.vgabase, 0x37);
> + switch ((regval & 0x60) >> 5) {
> + case 1: /* 4MB */
> + info->screen_size -= 4 << 20;
> + break;
> + case 2: /* 2MB */
> + info->screen_size -= 2 << 20;
> + break;
> + }
> } else
> info->screen_size = s3_memsizes[regval >> 5] << 10;
> info->fix.smem_len = info->screen_size;
>
>
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