Documentation/fb/viafb.rst

6 --------
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)
117 	To enable one device, such as DVI only, we can use::
125 	For DuoView case, we can use::
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)
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
172 	- 0 : No Dual Edge Panel (default)
173 	- 1 : Dual Edge Panel
188        multi-head since SAMM support multi monitor at driver layers, thus fbcon
190        device node file, thus a user mode application can't access it directly.
192        viafb_bpp1, viafb_refresh and viafb_refresh1 can be different.
196        viafb doesn't support multi-head well, or it will cause screen crush.
200 ---------------------------------
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
248 	independent units that produce the screen image. Those images can be
257 	This can happen for example if only one (the other) iga is used.
259 	runtime. One can add new devices, remove existing ones or switch
260 	between igas. Essentially you can write a ',' separated list of device
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
278 		# echo -DVP1,LVDS1 > /proc/viafb/iga2/output_devices
286 -----------------