viafb: viafb.modes, viafb.txt

Correct via_fb_ to viafb_ and remove the Kconfig part in viafb.txt.

viafb.modes: supported mode table
viafb.txt: documentation of viafb driver

Signed-off-by: Joseph Chan <[e-mail]>
Cc: Krzysztof Helt <[e-mail]>
Cc: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

Documentation/fb/viafb.modes

···
+#
+#
+#   These data are based on the CRTC parameters in
+#
+#       VIA Integration Graphics Chip
+#       (C) 2004 VIA Technologies Inc.
+#
+
+#
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+#               80 chars    480 lines
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+#               20 chars    45 lines
+#   Polarity        negative    negative
+#
+
+mode "640x480-60"
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+#
+#   640x480, 75 Hz, Non-Interlaced (31.50 MHz dotclock)
+#
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+#   Resolution      640     480
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+    mode "640x480-75"
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+    mode "640x480-85"
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+#
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+#
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+#               26 chars    29 lines
+#   Polarity        positive    positive
+#
+    mode "640x480-100"
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+    geometry 640 480 640 480 32 timings 23168 104 40 25 1 64 3 endmode
+#
+#   640x480, 120 Hz, Non-Interlaced (52.406 MHz dotclock)
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+#               Horizontal  Vertical
+#   Resolution      640     480
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+#   Polarity        positive    positive
+#
+    mode "640x480-120"
+# D: 52.406 MHz, H: 61.800 kHz, V: 120.00 Hz
+    geometry 640 480 640 480 32 timings 19081 104 40 31 1 64 3 endmode
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+    mode "720x480-60"
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+    mode "800x480-60"
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+    mode "800x600-60"
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+    geometry 800 600 800 600 32
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+    mode "800x600-75"
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+    mode "800x600-85"
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+    mode "800x600-100"
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+    geometry 800 600 800 600 32
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+    mode "800x600-120"
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+#               12 chars    1 lines
+#   Back Porch      2.889 us    0.600 ms
+#               39 chars    36 lines
+#   Active Time     11.852 us   16.000 ms
+#               160 chars   960 lines
+#   Blank Time      4.815 us    0.667 ms
+#               65 chars    40 lines
+#   Polarity        positive    positive
+#
+    mode "1280x960-60"
+# D: 108.00 MHz, H: 60.000 kHz, V: 60.00 Hz
+    geometry 1280 960 1280 960 32
+    timings 9259 312 96 36 1 112 3 hsync high vsync high endmode
+#
+#   1280x1024, 60 Hz, Non-Interlaced (108.00 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1280        1024
+#   Scan Frequency      63.981 kHz  60.02 Hz
+#   Sync Width      1.037 us    0.047 ms
+#               14 chars    3 lines
+#   Front Porch     0.444 us    0.015 ms
+#               6 chars     1 lines
+#   Back Porch      2.297 us    0.594 ms
+#               31 chars    38 lines
+#   Active Time     11.852 us   16.005 ms
+#               160 chars   1024 lines
+#   Blank Time      3.778 us    0.656 ms
+#               51 chars    42 lines
+#   Polarity        positive    positive
+#
+    mode "1280x1024-60"
+# D: 108.00 MHz, H: 63.981 kHz, V: 60.02 Hz
+    geometry 1280 1024 1280 1024 32
+    timings 9260 248 48 38 1 112 3 hsync high vsync high endmode
+#
+#   1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1280        1024
+#   Scan Frequency      79.976 kHz  75.02 Hz
+#   Sync Width      1.067 us    0.038 ms
+#               18 chars    3 lines
+#   Front Porch     0.119 us    0.012 ms
+#               2 chars     1 lines
+#   Back Porch      1.837 us    0.475 ms
+#               31 chars    38 lines
+#   Active Time     9.481 us    12.804 ms
+#               160 chars   1024 lines
+#   Blank Time      3.022 us    0.525 ms
+#               51 chars    42 lines
+#   Polarity        positive    positive
+#
+    mode "1280x1024-75"
+# D: 135.00 MHz, H: 79.976 kHz, V: 75.02 Hz
+    geometry 1280 1024 1280 1024 32
+    timings 7408 248 16 38 1 144 3 hsync high vsync high endmode
+#
+#   1280x1024, 85 Hz, Non-Interlaced (157.50 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1280        1024
+#   Scan Frequency  91.146 kHz  85.02 Hz
+#   Sync Width      1.016 us    0.033 ms
+#               20 chars    3 lines
+#   Front Porch     0.406 us    0.011 ms
+#               8 chars     1 lines
+#   Back Porch      1.422 us    0.483 ms
+#               28 chars    44 lines
+#   Active Time     8.127 us    11.235 ms
+#               160 chars   1024 lines
+#   Blank Time      2.844 us    0.527 ms
+#               56 chars    48 lines
+#   Polarity        positive    positive
+#
+    mode "1280x1024-85"
+# D: 157.50 MHz, H: 91.146 kHz, V: 85.02 Hz
+    geometry 1280 1024 1280 1024 32
+    timings 6349 224 64 44 1 160 3
+    hsync high vsync high endmode mode "1440x900-60"
+# D: 106.500 MHz, H: 55.935 kHz, V: 60.00 Hz
+    geometry 1440 900 1440 900 32
+    timings 9390 232 80 25 3 152 6
+    hsync high vsync high endmode mode "1440x900-75"
+# D: 136.750 MHz, H: 70.635 kHz, V: 75.00 Hz
+    geometry 1440 900 1440 900 32
+    timings 7315 248 96 33 3 152 6 hsync high vsync high endmode
+#
+#   1440x1050, 60 Hz, Non-Interlaced (125.10 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1440        1050
+#   Scan Frequency      65.220 kHz  60.00 Hz
+#   Sync Width      1.204 us    0.046 ms
+#               19 chars    3 lines
+#   Front Porch     0.760 us    0.015 ms
+#               12 chars    1 lines
+#   Back Porch      1.964 us    0.495 ms
+#               31 chars    33 lines
+#   Active Time     11.405 us   16.099 ms
+#               180 chars   1050 lines
+#   Blank Time      3.928 us    0.567 ms
+#               62 chars    37 lines
+#   Polarity        positive    positive
+#
+    mode "1440x1050-60"
+# D: 125.10 MHz, H: 65.220 kHz, V: 60.00 Hz
+    geometry 1440 1050 1440 1050 32
+    timings 7993 248 96 33 1 152 3
+    hsync high vsync high endmode mode "1600x900-60"
+# D: 118.250 MHz, H: 55.990 kHz, V: 60.00 Hz
+    geometry 1600 900 1600 900 32
+    timings 8415 256 88 26 3 168 5 endmode mode "1600x1024-60"
+# D: 136.358 MHz, H: 63.600 kHz, V: 60.00 Hz
+    geometry 1600 1024 1600 1024 32 timings 7315 272 104 32 1 168 3 endmode
+#
+#   1600x1200, 60 Hz, Non-Interlaced (156.00 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1600        1200
+#   Scan Frequency      76.200 kHz  60.00 Hz
+#   Sync Width      1.026 us    0.105 ms
+#               20 chars    8 lines
+#   Front Porch     0.205 us    0.131 ms
+#               4 chars     10 lines
+#   Back Porch      1.636 us    0.682 ms
+#               32 chars    52 lines
+#   Active Time     10.256 us   15.748 ms
+#               200 chars   1200 lines
+#   Blank Time      2.872 us    0.866 ms
+#               56 chars    66 lines
+#   Polarity        negative    negative
+#
+    mode "1600x1200-60"
+# D: 156.00 MHz, H: 76.200 kHz, V: 60.00 Hz
+    geometry 1600 1200 1600 1200 32 timings 6172 256 32 52 10 160 8 endmode
+#
+#   1600x1200, 75 Hz, Non-Interlaced (202.50 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1600        1200
+#   Scan Frequency  93.750 kHz  75.00 Hz
+#   Sync Width      0.948 us    0.032 ms
+#               24 chars    3 lines
+#   Front Porch     0.316 us    0.011 ms
+#               8 chars     1 lines
+#   Back Porch      1.501 us    0.491 ms
+#               38 chars    46 lines
+#   Active Time     7.901 us    12.800 ms
+#               200 chars   1200 lines
+#   Blank Time      2.765 us    0.533 ms
+#               70 chars    50 lines
+#   Polarity    positive    positive
+#
+    mode "1600x1200-75"
+# D: 202.50 MHz, H: 93.750 kHz, V: 75.00 Hz
+    geometry 1600 1200 1600 1200 32
+    timings 4938 304 64 46 1 192 3
+    hsync high vsync high endmode mode "1680x1050-60"
+# D: 146.250 MHz, H: 65.290 kHz, V: 59.954 Hz
+    geometry 1680 1050 1680 1050 32
+    timings 6814 280 104 30 3 176 6
+    hsync high vsync high endmode mode "1680x1050-75"
+# D: 187.000 MHz, H: 82.306 kHz, V: 74.892 Hz
+    geometry 1680 1050 1680 1050 32
+    timings 5348 296 120 40 3 176 6
+    hsync high vsync high endmode mode "1792x1344-60"
+# D: 202.975 MHz, H: 83.460 kHz, V: 60.00 Hz
+    geometry 1792 1344 1792 1344 32
+    timings 4902 320 128 43 1 192 3
+    hsync high vsync high endmode mode "1856x1392-60"
+# D: 218.571 MHz, H: 86.460 kHz, V: 60.00 Hz
+    geometry 1856 1392 1856 1392 32
+    timings 4577 336 136 45 1 200 3
+    hsync high vsync high endmode mode "1920x1200-60"
+# D: 193.250 MHz, H: 74.556 kHz, V: 60.00 Hz
+    geometry 1920 1200 1920 1200 32
+    timings 5173 336 136 36 3 200 6
+    hsync high vsync high endmode mode "1920x1440-60"
+# D: 234.000 MHz, H:90.000 kHz, V: 60.00 Hz
+    geometry 1920 1440 1920 1440 32
+    timings 4274 344 128 56 1 208 3
+    hsync high vsync high endmode mode "1920x1440-75"
+# D: 297.000 MHz, H:112.500 kHz, V: 75.00 Hz
+    geometry 1920 1440 1920 1440 32
+    timings 3367 352 144 56 1 224 3
+    hsync high vsync high endmode mode "2048x1536-60"
+# D: 267.250 MHz, H: 95.446 kHz, V: 60.00 Hz
+    geometry 2048 1536 2048 1536 32
+    timings 3742 376 152 49 3 224 4 hsync high vsync high endmode
+#
+#   1280x720, 60 Hz, Non-Interlaced (74.481 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1280        720
+#   Scan Frequency      44.760 kHz  60.00 Hz
+#   Sync Width      1.826 us    67.024 ms
+#               17 chars    3 lines
+#   Front Porch     0.752 us    22.341 ms
+#               7 chars     1 lines
+#   Back Porch      2.578 us    491.510 ms
+#               24 chars    22 lines
+#   Active Time     17.186 us   16.086 ms
+#               160 chars   720 lines
+#   Blank Time      5.156 us    0.581 ms
+#               48 chars    26 lines
+#   Polarity        negative    negative
+#
+    mode "1280x720-60"
+# D: 74.481 MHz, H: 44.760 kHz, V: 60.00 Hz
+    geometry 1280 720 1280 720 32 timings 13426 192 64 22 1 136 3 endmode
+#
+#   1920x1080, 60 Hz, Non-Interlaced (172.798 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1920        1080
+#   Scan Frequency      67.080 kHz  60.00 Hz
+#   Sync Width      1.204 us    44.723 ms
+#               26 chars    3 lines
+#   Front Porch     0.694 us    14.908 ms
+#               15 chars     1 lines
+#   Back Porch      1.898 us    506.857 ms
+#               41 chars    34 lines
+#   Active Time     11.111 us   16.100 ms
+#               240 chars   1080 lines
+#   Blank Time      3.796 us    0.566 ms
+#               82 chars    38 lines
+#   Polarity        negative    negative
+#
+    mode "1920x1080-60"
+# D: 74.481 MHz, H: 67.080 kHz, V: 60.00 Hz
+    geometry 1920 1080 1920 1080 32 timings 5787 328 120 34 1 208 3 endmode
+#
+#   1400x1050, 60 Hz, Non-Interlaced (122.61 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1400        1050
+#   Scan Frequency      65.218 kHz  59.99 Hz
+#   Sync Width      1.037 us    0.047 ms
+#               19 chars    3 lines
+#   Front Porch     0.444 us    0.015 ms
+#               11 chars     1 lines
+#   Back Porch      1.185 us    0.188 ms
+#               30 chars    33 lines
+#   Active Time     12.963 us   16.411 ms
+#               175 chars   1050 lines
+#   Blank Time      2.667 us    0.250 ms
+#               60 chars    37 lines
+#   Polarity        negative    positive
+#
+    mode "1400x1050-60"
+# D: 122.750 MHz, H: 65.317 kHz, V: 59.99 Hz
+    geometry 1400 1050 1408 1050 32
+    timings 8214 232 88 32 3 144 4 endmode mode "1400x1050-75"
+# D: 156.000 MHz, H: 82.278 kHz, V: 74.867 Hz
+    geometry 1400 1050 1408 1050 32 timings 6410 248 104 42 3 144 4 endmode
+#
+#   1366x768, 60 Hz, Non-Interlaced (85.86 MHz dotclock)
+#
+#               Horizontal  Vertical
+#   Resolution      1366        768
+#   Scan Frequency      47.700 kHz  60.00 Hz
+#   Sync Width      1.677 us    0.063 ms
+#               18 chars    3 lines
+#   Front Porch     0.839 us    0.021 ms
+#               9 chars     1 lines
+#   Back Porch      2.516 us    0.482 ms
+#               27 chars    23 lines
+#   Active Time     15.933 us   16.101 ms
+#               171 chars   768 lines
+#   Blank Time      5.031 us    0.566 ms
+#               54 chars    27 lines
+#   Polarity        negative    positive
+#
+    mode "1360x768-60"
+# D: 84.750 MHz, H: 47.720 kHz, V: 60.00 Hz
+    geometry 1360 768 1360 768 32
+    timings 11799 208 72 22 3 136 5 endmode mode "1366x768-60"
+# D: 85.86 MHz, H: 47.700 kHz, V: 60.00 Hz
+    geometry 1366 768 1366 768 32
+    timings 11647 216 72 23 1 144 3 endmode mode "1366x768-50"
+# D: 69,924 MHz, H: 39.550 kHz, V: 50.00 Hz
+    geometry 1366 768 1366 768 32 timings 14301 200 56 19 1 144 3 endmode

Documentation/fb/viafb.txt

···
+
+        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)
+
+[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 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_video_dev:
+        This option is used to specify video output devices(CRT, DVI, LCD) for
+        duoview case.
+        For example:
+        To output video on DVI, we should use:
+            modprobe viafb viafb_video_dev=DVI...
+
+    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.
+    4. VX800 2D accelerator hasn't been supported in this driver yet. When
+       using driver on VX800, the driver will disable the acceleration
+       function as default.
+
+
+[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
+
+[Bootup with viafb]:
+--------------------
+    Add the following line to your grub.conf:
+    append = "video=viafb:viafb_mode=1024x768,viafb_bpp=32,viafb_refresh=85"
+