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Diffstat (limited to 'Documentation/fb/viafb.txt')
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diff --git a/Documentation/fb/viafb.txt b/Documentation/fb/viafb.txt deleted file mode 100644 index 1cb2462a71ce..000000000000 --- a/Documentation/fb/viafb.txt +++ /dev/null @@ -1,252 +0,0 @@ - - VIA Integration Graphic Chip Console Framebuffer Driver - -[Platform] ------------------------ - The console framebuffer driver is for graphics chips of - VIA UniChrome Family(CLE266, PM800 / CN400 / CN300, - P4M800CE / P4M800Pro / CN700 / VN800, - CX700 / VX700, K8M890, P4M890, - CN896 / P4M900, VX800, VX855) - -[Driver features] ------------------------- - Device: CRT, LCD, DVI - - Support viafb_mode: - CRT: - 640x480(60, 75, 85, 100, 120 Hz), 720x480(60 Hz), - 720x576(60 Hz), 800x600(60, 75, 85, 100, 120 Hz), - 848x480(60 Hz), 856x480(60 Hz), 1024x512(60 Hz), - 1024x768(60, 75, 85, 100 Hz), 1152x864(75 Hz), - 1280x768(60 Hz), 1280x960(60 Hz), 1280x1024(60, 75, 85 Hz), - 1440x1050(60 Hz), 1600x1200(60, 75 Hz), 1280x720(60 Hz), - 1920x1080(60 Hz), 1400x1050(60 Hz), 800x480(60 Hz) - - color depth: 8 bpp, 16 bpp, 32 bpp supports. - - Support 2D hardware accelerator. - -[Using the viafb module] --- -- -------------------- - Start viafb with default settings: - #modprobe viafb - - Start viafb with user options: - #modprobe viafb viafb_mode=800x600 viafb_bpp=16 viafb_refresh=60 - viafb_active_dev=CRT+DVI viafb_dvi_port=DVP1 - viafb_mode1=1024x768 viafb_bpp=16 viafb_refresh1=60 - viafb_SAMM_ON=1 - - viafb_mode: - 640x480 (default) - 720x480 - 800x600 - 1024x768 - ...... - - viafb_bpp: - 8, 16, 32 (default:32) - - viafb_refresh: - 60, 75, 85, 100, 120 (default:60) - - viafb_lcd_dsp_method: - 0 : expansion (default) - 1 : centering - - viafb_lcd_mode: - 0 : LCD panel with LSB data format input (default) - 1 : LCD panel with MSB data format input - - viafb_lcd_panel_id: - 0 : Resolution: 640x480, Channel: single, Dithering: Enable - 1 : Resolution: 800x600, Channel: single, Dithering: Enable - 2 : Resolution: 1024x768, Channel: single, Dithering: Enable (default) - 3 : Resolution: 1280x768, Channel: single, Dithering: Enable - 4 : Resolution: 1280x1024, Channel: dual, Dithering: Enable - 5 : Resolution: 1400x1050, Channel: dual, Dithering: Enable - 6 : Resolution: 1600x1200, Channel: dual, Dithering: Enable - - 8 : Resolution: 800x480, Channel: single, Dithering: Enable - 9 : Resolution: 1024x768, Channel: dual, Dithering: Enable - 10: Resolution: 1024x768, Channel: single, Dithering: Disable - 11: Resolution: 1024x768, Channel: dual, Dithering: Disable - 12: Resolution: 1280x768, Channel: single, Dithering: Disable - 13: Resolution: 1280x1024, Channel: dual, Dithering: Disable - 14: Resolution: 1400x1050, Channel: dual, Dithering: Disable - 15: Resolution: 1600x1200, Channel: dual, Dithering: Disable - 16: Resolution: 1366x768, Channel: single, Dithering: Disable - 17: Resolution: 1024x600, Channel: single, Dithering: Enable - 18: Resolution: 1280x768, Channel: dual, Dithering: Enable - 19: Resolution: 1280x800, Channel: single, Dithering: Enable - - viafb_accel: - 0 : No 2D Hardware Acceleration - 1 : 2D Hardware Acceleration (default) - - viafb_SAMM_ON: - 0 : viafb_SAMM_ON disable (default) - 1 : viafb_SAMM_ON enable - - viafb_mode1: (secondary display device) - 640x480 (default) - 720x480 - 800x600 - 1024x768 - ... ... - - viafb_bpp1: (secondary display device) - 8, 16, 32 (default:32) - - viafb_refresh1: (secondary display device) - 60, 75, 85, 100, 120 (default:60) - - viafb_active_dev: - This option is used to specify active devices.(CRT, DVI, CRT+LCD...) - DVI stands for DVI or HDMI, E.g., If you want to enable HDMI, - set viafb_active_dev=DVI. In SAMM case, the previous of - viafb_active_dev is primary device, and the following is - secondary device. - - For example: - To enable one device, such as DVI only, we can use: - modprobe viafb viafb_active_dev=DVI - To enable two devices, such as CRT+DVI: - modprobe viafb viafb_active_dev=CRT+DVI; - - For DuoView case, we can use: - modprobe viafb viafb_active_dev=CRT+DVI - OR - modprobe viafb viafb_active_dev=DVI+CRT... - - For SAMM case: - If CRT is primary and DVI is secondary, we should use: - modprobe viafb viafb_active_dev=CRT+DVI viafb_SAMM_ON=1... - If DVI is primary and CRT is secondary, we should use: - modprobe viafb viafb_active_dev=DVI+CRT viafb_SAMM_ON=1... - - viafb_display_hardware_layout: - This option is used to specify display hardware layout for CX700 chip. - 1 : LCD only - 2 : DVI only - 3 : LCD+DVI (default) - 4 : LCD1+LCD2 (internal + internal) - 16: LCD1+ExternalLCD2 (internal + external) - - viafb_second_size: - This option is used to set second device memory size(MB) in SAMM case. - The minimal size is 16. - - viafb_platform_epia_dvi: - This option is used to enable DVI on EPIA - M - 0 : No DVI on EPIA - M (default) - 1 : DVI on EPIA - M - - viafb_bus_width: - When using 24 - Bit Bus Width Digital Interface, - this option should be set. - 12: 12-Bit LVDS or 12-Bit TMDS (default) - 24: 24-Bit LVDS or 24-Bit TMDS - - viafb_device_lcd_dualedge: - When using Dual Edge Panel, this option should be set. - 0 : No Dual Edge Panel (default) - 1 : Dual Edge Panel - - viafb_lcd_port: - This option is used to specify LCD output port, - available values are "DVP0" "DVP1" "DFP_HIGHLOW" "DFP_HIGH" "DFP_LOW". - for external LCD + external DVI on CX700(External LCD is on DVP0), - we should use: - modprobe viafb viafb_lcd_port=DVP0... - -Notes: - 1. CRT may not display properly for DuoView CRT & DVI display at - the "640x480" PAL mode with DVI overscan enabled. - 2. SAMM stands for single adapter multi monitors. It is different from - multi-head since SAMM support multi monitor at driver layers, thus fbcon - layer doesn't even know about it; SAMM's second screen doesn't have a - device node file, thus a user mode application can't access it directly. - When SAMM is enabled, viafb_mode and viafb_mode1, viafb_bpp and - viafb_bpp1, viafb_refresh and viafb_refresh1 can be different. - 3. When console is depending on viafbinfo1, dynamically change resolution - and bpp, need to call VIAFB specified ioctl interface VIAFB_SET_DEVICE - instead of calling common ioctl function FBIOPUT_VSCREENINFO since - viafb doesn't support multi-head well, or it will cause screen crush. - - -[Configure viafb with "fbset" tool] ------------------------------------ - "fbset" is an inbox utility of Linux. - 1. Inquire current viafb information, type, - # fbset -i - - 2. Set various resolutions and viafb_refresh rates, - # fbset <resolution-vertical_sync> - - example, - # fbset "1024x768-75" - or - # fbset -g 1024 768 1024 768 32 - Check the file "/etc/fb.modes" to find display modes available. - - 3. Set the color depth, - # fbset -depth <value> - - example, - # fbset -depth 16 - - -[Configure viafb via /proc] ---------------------------- - The following files exist in /proc/viafb - - supported_output_devices - - This read-only file contains a full ',' separated list containing all - output devices that could be available on your platform. It is likely - that not all of those have a connector on your hardware but it should - provide a good starting point to figure out which of those names match - a real connector. - Example: - # cat /proc/viafb/supported_output_devices - - iga1/output_devices - iga2/output_devices - - These two files are readable and writable. iga1 and iga2 are the two - independent units that produce the screen image. Those images can be - forwarded to one or more output devices. Reading those files is a way - to query which output devices are currently used by an iga. - Example: - # cat /proc/viafb/iga1/output_devices - If there are no output devices printed the output of this iga is lost. - This can happen for example if only one (the other) iga is used. - Writing to these files allows adjusting the output devices during - runtime. One can add new devices, remove existing ones or switch - between igas. Essentially you can write a ',' separated list of device - names (or a single one) in the same format as the output to those - files. You can add a '+' or '-' as a prefix allowing simple addition - and removal of devices. So a prefix '+' adds the devices from your list - to the already existing ones, '-' removes the listed devices from the - existing ones and if no prefix is given it replaces all existing ones - with the listed ones. If you remove devices they are expected to turn - off. If you add devices that are already part of the other iga they are - removed there and added to the new one. - Examples: - Add CRT as output device to iga1 - # echo +CRT > /proc/viafb/iga1/output_devices - - Remove (turn off) DVP1 and LVDS1 as output devices of iga2 - # echo -DVP1,LVDS1 > /proc/viafb/iga2/output_devices - - Replace all iga1 output devices by CRT - # echo CRT > /proc/viafb/iga1/output_devices - - -[Bootup with viafb]: --------------------- - Add the following line to your grub.conf: - append = "video=viafb:viafb_mode=1024x768,viafb_bpp=32,viafb_refresh=85" - |