From 532f9169db21fbffd07cc44075c7ea1859c07806 Mon Sep 17 00:00:00 2001 From: Florian Tobias Schandinat Date: Wed, 19 Oct 2011 20:32:50 +0000 Subject: viafb: make single framebuffer multiple adapter mode work This patch implementes this mode (viafb_SAMM_ON set and viafb_dual_fb not set) in a useful way for CRT and DVI devices. The same content is shown on both devices in different video modes. The first (primary) resolution must not be bigger than the secondary one and determines the visible region. The same content is shown centered on the secondary output. Signed-off-by: Florian Tobias Schandinat --- drivers/video/via/hw.c | 41 +++++++++++++++++++++++------------------ 1 file changed, 23 insertions(+), 18 deletions(-) (limited to 'drivers/video/via/hw.c') diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c index 399d50754c4..e8725c5235c 100644 --- a/drivers/video/via/hw.c +++ b/drivers/video/via/hw.c @@ -1467,28 +1467,31 @@ void viafb_set_vclock(u32 clk, int set_iga) via_write_misc_reg_mask(0x0C, 0x0C); /* select external clock */ } -static struct display_timing var_to_timing(const struct fb_var_screeninfo *var) +static struct display_timing var_to_timing(const struct fb_var_screeninfo *var, u16 cxres, u16 cyres) { struct display_timing timing; + u16 dx = (var->xres - cxres) / 2, dy = (var->yres - cyres) / 2; - timing.hor_addr = var->xres; - timing.hor_sync_start = timing.hor_addr + var->right_margin; + timing.hor_addr = cxres; + timing.hor_sync_start = timing.hor_addr + var->right_margin + dx; timing.hor_sync_end = timing.hor_sync_start + var->hsync_len; - timing.hor_total = timing.hor_sync_end + var->left_margin; - timing.hor_blank_start = timing.hor_addr; - timing.hor_blank_end = timing.hor_total; - timing.ver_addr = var->yres; - timing.ver_sync_start = timing.ver_addr + var->lower_margin; + timing.hor_total = timing.hor_sync_end + var->left_margin + dx; + timing.hor_blank_start = timing.hor_addr + dx; + timing.hor_blank_end = timing.hor_total - dy; + timing.ver_addr = cyres; + timing.ver_sync_start = timing.ver_addr + var->lower_margin + dy; timing.ver_sync_end = timing.ver_sync_start + var->vsync_len; - timing.ver_total = timing.ver_sync_end + var->upper_margin; - timing.ver_blank_start = timing.ver_addr; - timing.ver_blank_end = timing.ver_total; + timing.ver_total = timing.ver_sync_end + var->upper_margin + dy; + timing.ver_blank_start = timing.ver_addr + dy; + timing.ver_blank_end = timing.ver_total - dy; return timing; } -void viafb_fill_crtc_timing(const struct fb_var_screeninfo *var, int iga) +void viafb_fill_crtc_timing(const struct fb_var_screeninfo *var, + u16 cxres, u16 cyres, int iga) { - struct display_timing crt_reg = var_to_timing(var); + struct display_timing crt_reg = var_to_timing(var, + cxres ? cxres : var->xres, cyres ? cyres : var->yres); if (iga == IGA1) via_set_primary_timing(&crt_reg); @@ -1842,7 +1845,7 @@ static void hw_init(void) int viafb_setmode(int video_bpp, int video_bpp1) { - int j; + int j, cxres = 0, cyres = 0; int port; u32 devices = viaparinfo->shared->iga1_devices | viaparinfo->shared->iga2_devices; @@ -1891,6 +1894,8 @@ int viafb_setmode(int video_bpp, int video_bpp1) } else if (viafb_SAMM_ON) { viafb_fill_var_timing_info(&var2, viafb_get_best_mode( viafb_second_xres, viafb_second_yres, viafb_refresh1)); + cxres = viafbinfo->var.xres; + cyres = viafbinfo->var.yres; var2.bits_per_pixel = viafbinfo->var.bits_per_pixel; } @@ -1898,9 +1903,9 @@ int viafb_setmode(int video_bpp, int video_bpp1) if (viafb_CRT_ON) { if (viaparinfo->shared->iga2_devices & VIA_CRT && viafb_SAMM_ON) - viafb_fill_crtc_timing(&var2, IGA2); + viafb_fill_crtc_timing(&var2, cxres, cyres, IGA2); else - viafb_fill_crtc_timing(&viafbinfo->var, + viafb_fill_crtc_timing(&viafbinfo->var, 0, 0, (viaparinfo->shared->iga1_devices & VIA_CRT) ? IGA1 : IGA2); @@ -1918,9 +1923,9 @@ int viafb_setmode(int video_bpp, int video_bpp1) if (viafb_DVI_ON) { if (viaparinfo->shared->tmds_setting_info.iga_path == IGA2 && viafb_SAMM_ON) - viafb_dvi_set_mode(&var2, IGA2); + viafb_dvi_set_mode(&var2, cxres, cyres, IGA2); else - viafb_dvi_set_mode(&viafbinfo->var, + viafb_dvi_set_mode(&viafbinfo->var, 0, 0, viaparinfo->tmds_setting_info->iga_path); } -- cgit v1.2.3