Documentation/fb/viafb.rst

6 --------
7     The console framebuffer driver is for graphics chips of
15 ---------------
34 ----------------------
47 	- 640x480 (default)
48 	- 720x480
49 	- 800x600
50 	- 1024x768
53 	- 8, 16, 32 (default:32)
56 	- 60, 75, 85, 100, 120 (default:60)
59 	- 0 : expansion (default)
60 	- 1 : centering
67 	- 0 : Resolution: 640x480, Channel: single, Dithering: Enable
68 	- 1 : Resolution: 800x600, Channel: single, Dithering: Enable
69 	- 2 : Resolution: 1024x768, Channel: single, Dithering: Enable (default)
70 	- 3 : Resolution: 1280x768, Channel: single, Dithering: Enable
71 	- 4 : Resolution: 1280x1024, Channel: dual, Dithering: Enable
72 	- 5 : Resolution: 1400x1050, Channel: dual, Dithering: Enable
73 	- 6 : Resolution: 1600x1200, Channel: dual, Dithering: Enable
75 	- 8 : Resolution: 800x480, Channel: single, Dithering: Enable
76 	- 9 : Resolution: 1024x768, Channel: dual, Dithering: Enable
77 	- 10: Resolution: 1024x768, Channel: single, Dithering: Disable
78 	- 11: Resolution: 1024x768, Channel: dual, Dithering: Disable
79 	- 12: Resolution: 1280x768, Channel: single, Dithering: Disable
80 	- 13: Resolution: 1280x1024, Channel: dual, Dithering: Disable
81 	- 14: Resolution: 1400x1050, Channel: dual, Dithering: Disable
82 	- 15: Resolution: 1600x1200, Channel: dual, Dithering: Disable
83 	- 16: Resolution: 1366x768, Channel: single, Dithering: Disable
84 	- 17: Resolution: 1024x600, Channel: single, Dithering: Enable
85 	- 18: Resolution: 1280x768, Channel: dual, Dithering: Enable
86 	- 19: Resolution: 1280x800, Channel: single, Dithering: Enable
89 	- 0 : No 2D Hardware Acceleration
90 	- 1 : 2D Hardware Acceleration (default)
93 	- 0 : viafb_SAMM_ON disable (default)
94 	- 1 : viafb_SAMM_ON enable
97 	- 640x480 (default)
98 	- 720x480
99 	- 800x600
100 	- 1024x768
103 	- 8, 16, 32 (default:32)
106 	- 60, 75, 85, 100, 120 (default:60)
109 	This option is used to specify active devices.(CRT, DVI, CRT+LCD...)
112 	viafb_active_dev is primary device, and the following is
135 	If CRT is primary and DVI is secondary, we should use::
139 	If DVI is primary and CRT is secondary, we should use::
144 	This option is used to specify display hardware layout for CX700 chip.
146 	- 1 : LCD only
147 	- 2 : DVI only
148 	- 3 : LCD+DVI (default)
149 	- 4 : LCD1+LCD2 (internal + internal)
150 	- 16: LCD1+ExternalLCD2 (internal + external)
153 	This option is used to set second device memory size(MB) in SAMM case.
154 	The minimal size is 16.
157 	This option is used to enable DVI on EPIA - M
159 	- 0 : No DVI on EPIA - M (default)
160 	- 1 : DVI on EPIA - M
163 	When using 24 - Bit Bus Width Digital Interface,
166 	- 12: 12-Bit LVDS or 12-Bit TMDS (default)
167 	- 24: 24-Bit LVDS or 24-Bit TMDS
170 	When using Dual Edge Panel, this option should be set.
172 	- 0 : No Dual Edge Panel (default)
173 	- 1 : Dual Edge Panel
176 	This option is used to specify LCD output port,
179 	for external LCD + external DVI on CX700(External LCD is on DVP0),
187     2. SAMM stands for single adapter multi monitors. It is different from
188        multi-head since SAMM support multi monitor at driver layers, thus fbcon
191        When SAMM is enabled, viafb_mode and viafb_mode1, viafb_bpp and
193     3. When console is depending on viafbinfo1, dynamically change resolution
196        viafb doesn't support multi-head well, or it will cause screen crush.
200 ---------------------------------
202     "fbset" is an inbox utility of Linux.
206 	   # fbset -i
210 	   # fbset <resolution-vertical_sync>
214 	   # fbset "1024x768-75"
218 	   # fbset -g 1024 768 1024 768 32
224 	   # fbset -depth <value>
228 	   # fbset -depth 16
232 -------------------------
236 	This read-only file contains a full ',' separated list containing all
237 	output devices that could be available on your platform. It is likely
249 	forwarded to one or more output devices. Reading those files is a way
256 	If there are no output devices printed the output of this iga is lost.
257 	This can happen for example if only one (the other) iga is used.
262 	files. You can add a '+' or '-' as a prefix allowing simple addition
264 	to the already existing ones, '-' removes the listed devices from the
265 	existing ones and if no prefix is given it replaces all existing ones
278 		# echo -DVP1,LVDS1 > /proc/viafb/iga2/output_devices
286 -----------------