path: root/Documentation
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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-26 09:21:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-26 09:21:09 -0700
commit757c26b804428ef10888b8e00f34994dbe361d3a (patch)
tree4695afbf476ce9818bc01d34d4c266811365296c /Documentation
parente08dc1325feaf49eec392ee52feb2974ec3f5155 (diff)
parent5a96a899bbdee86024ab9ea6d02b9e242faacbed (diff)
Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (135 commits) drm/radeon/kms: fix DP training for DPEncoderService revision bigger than 1.1 drm/radeon/kms: add missing vddci setting on NI+ drm/radeon: Add a rmb() in IH processing drm/radeon: ATOM Endian fix for atombios_crtc_program_pll() drm/radeon: Fix the definition of RADEON_BUF_SWAP_32BIT drm/radeon: Do an MMIO read on interrupts when not uisng MSIs drm/radeon: Writeback endian fixes drm/radeon: Remove a bunch of useless _iomem casts drm/gem: add support for private objects DRM: clean up and document parsing of video= parameter DRM: Radeon: Fix section mismatch. drm: really make debug levels match in edid failure code drm/radeon/kms: fix i2c map for rv250/280 drm/nouveau/gr: disable fifo access and idle before suspend ctx unload drm/nouveau: pass flag to engine fini() method on suspend drm/nouveau: replace nv04_graph_fifo_access() use with direct reg bashing drm/nv40/gr: rewrite/split context takedown functions drm/nouveau: detect disabled device in irq handler and return IRQ_NONE drm/nouveau: ignore connector type when deciding digital/analog on DVI-I drm/nouveau: Add a quirk for Gigabyte NX86T ...
Diffstat (limited to 'Documentation')
1 files changed, 18 insertions, 3 deletions
diff --git a/Documentation/fb/modedb.txt b/Documentation/fb/modedb.txt
index ec4dee75a354..16aa08453911 100644
--- a/Documentation/fb/modedb.txt
+++ b/Documentation/fb/modedb.txt
@@ -20,7 +20,7 @@ in a video= option, fbmem considers that to be a global video mode option.
Valid mode specifiers (mode_option argument):
- <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m]
+ <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
@@ -36,6 +36,21 @@ pixels and 1.8% of yres).
Sample usage: 1024x768M@60m - CVT timing with margins
+DRM drivers also add options to enable or disable outputs:
+'e' will force the display to be enabled, i.e. it will override the detection
+if a display is connected. 'D' will force the display to be enabled and use
+digital output. This is useful for outputs that have both analog and digital
+signals (e.g. HDMI and DVI-I). For other outputs it behaves like 'e'. If 'd'
+is specified the output is disabled.
+You can additionally specify which output the options matches to.
+To force the VGA output to be enabled and drive a specific mode say:
+ video=VGA-1:1280x1024@60me
+Specifying the option multiple times for different ports is possible, e.g.:
+ video=LVDS-1:d video=HDMI-1:D
***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo ***** oOo *****
What is the VESA(TM) Coordinated Video Timings (CVT)?
@@ -132,5 +147,5 @@ There may be more modes.
tridentfb - Trident (Cyber)blade chipset frame buffer
vt8623fb - VIA 8623 frame buffer
-BTW, only a few drivers use this at the moment. Others are to follow
-(feel free to send patches).
+BTW, only a few fb drivers use this at the moment. Others are to follow
+(feel free to send patches). The DRM drivers also support this.

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