From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ondrej Zary Date: Mon, 19 Dec 2011 22:39:47 +0000 Subject: [PATCH] s3fb: fix Virge/VX Message-Id: <201112192339.52676.linux@rainbow-software.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Florian Tobias Schandinat Cc: Paul Mundt , Ondrej Zajicek , linux-fbdev@vger.kernel.org, Kernel development list 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-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; -- Ondrej Zary