From 3744281b9ae8aa0ab86ceaee1afe8a603e3aeb2c Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 19 Nov 2012 10:16:38 +0100 Subject: dos -> unix --- xorg-server/hw/xfree86/ddc/DDC.HOWTO | 194 ++++++++++++++++----------------- xorg-server/hw/xfree86/ddc/Makefile.am | 22 ++-- 2 files changed, 108 insertions(+), 108 deletions(-) (limited to 'xorg-server/hw/xfree86/ddc') diff --git a/xorg-server/hw/xfree86/ddc/DDC.HOWTO b/xorg-server/hw/xfree86/ddc/DDC.HOWTO index 54fbe73ad..1d06ca124 100644 --- a/xorg-server/hw/xfree86/ddc/DDC.HOWTO +++ b/xorg-server/hw/xfree86/ddc/DDC.HOWTO @@ -1,97 +1,97 @@ - DDC.HOWTO - - This file describes how to add DDC support to a chipset driver. - -1) DDC INITIALIZATION - - When implementing DDC in the driver one has the choice between - DDC1 and DDC2. - DDC1 data is continuously transmitted by a DDC1 capable display - device. The data is send serially over a data line; the Vsync - signal serves as clock. Only one EDID 1.x data block can be - transmitted using DDC1. Since transmission of an EDID1 block - using a regular Vsync frequency would take up several seconds - the driver can increase the Vsync frequency to up to 25 kHz as - soon as it detects DDC1 activity on the data line. - DDC2 data is transmitted using the I2C protocol. This requires - an additional clock line. DDC2 is capable of transmitting EDID1 - and EDID2 block as well as a VDIF block on display devices that - support these. - Display devices switch into the DDC2 mode as soon as they detect - activity on the DDC clock line. Once the are in DDC2 mode they - stop transmitting DDC1 signals until the next power cycle. - - Some graphics chipset configurations which are not capable of - DDC2 might still be able to read DDC1 data. Where available - DDC2 it is preferable. - - All relevant prototypes and defines are in xf86DDC.h. - DDC2 additionally requires I2C support. The I2C prototypes - are in xf86i2c.h. - - DDC1 Support: - - The driver has to provide a read function which waits for the - end of the next Vsync signal and reads in and returns the status - of the DDC line: - - unsigned int XXX_ddc1Read(ScrnInfoPtr pScrn) - - Additionally a function is required to increase the Vsync - frequency to max. 25 kHz. - - void XXX_ddc1SetSpeed(ScrnInfoPtr pScrn, xf86ddcSpeed speed) - - If the speed argument is DDC_FAST the function should increase - the Vsync frequency on DDC_SLOW it should restore the original - value. For convenience a generic ddc1SetSpeed() function is provided - in the vga module for VGA-like chipsets. - - void vgaHWddc1SetSpeed(ScrnInfoPtr pScrn, sf86ddcSpeed speed). - - To read out the DDC1 data the driver should call - - xf86MonPtr xf86DoEDID_DDC1(int scrnIndex, - void (*DDC1SetSpeed)(ScrnInfoPtr, xf86ddcSpeed), - unsigned int (*DDC1Read)(ScrnInfoPtr)) - - in PreInit(). DDC1SetSpeed is a pointer to the SetSpeed() - function, DDC1Read has to point to the DDC1 read function. - The function will return a pointer to the xf86Monitor structure - which contains all information retrieved by DDC. - NULL will be returned on failure. - - DDC2 Support - - To read out DDC2 information I2C has to be initialized first. - (See documentation for the i2c module). - The function - - xf86MonPtr xf86DoEDID_DDC2(int scrnIndex, I2CBusPtr pBus) - - is provided to read out and process DDC2 data. A pointer - to the I2CBusRec of the appropriate I2C Bus has to be passed - as the second argument. - The function will return a pointer to the xf86Monitor structure - which contains all information retrieved by DDC. - NULL will be returned on failure. - - Printing monitor parameters - - To print out the information contained in the xf86Monitor - structure the function - - xf86MonPtr xf86PrintEDID(xf86MonPtr monitor) - - is provided. - - Further processing of the xf86Monitor structure is not yet - implemented. However, it is planned to use the information - about video modes, gamma values etc. - Therefore it is strongly recommended to read out DDC data - before any video mode processing is done. - - - - -$XFree86: xc/programs/Xserver/hw/xfree86/ddc/DDC.HOWTO,v 1.2 1998/12/06 13:30:39 dawes Exp $ + DDC.HOWTO + + This file describes how to add DDC support to a chipset driver. + +1) DDC INITIALIZATION + + When implementing DDC in the driver one has the choice between + DDC1 and DDC2. + DDC1 data is continuously transmitted by a DDC1 capable display + device. The data is send serially over a data line; the Vsync + signal serves as clock. Only one EDID 1.x data block can be + transmitted using DDC1. Since transmission of an EDID1 block + using a regular Vsync frequency would take up several seconds + the driver can increase the Vsync frequency to up to 25 kHz as + soon as it detects DDC1 activity on the data line. + DDC2 data is transmitted using the I2C protocol. This requires + an additional clock line. DDC2 is capable of transmitting EDID1 + and EDID2 block as well as a VDIF block on display devices that + support these. + Display devices switch into the DDC2 mode as soon as they detect + activity on the DDC clock line. Once the are in DDC2 mode they + stop transmitting DDC1 signals until the next power cycle. + + Some graphics chipset configurations which are not capable of + DDC2 might still be able to read DDC1 data. Where available + DDC2 it is preferable. + + All relevant prototypes and defines are in xf86DDC.h. + DDC2 additionally requires I2C support. The I2C prototypes + are in xf86i2c.h. + + DDC1 Support: + + The driver has to provide a read function which waits for the + end of the next Vsync signal and reads in and returns the status + of the DDC line: + + unsigned int XXX_ddc1Read(ScrnInfoPtr pScrn) + + Additionally a function is required to increase the Vsync + frequency to max. 25 kHz. + + void XXX_ddc1SetSpeed(ScrnInfoPtr pScrn, xf86ddcSpeed speed) + + If the speed argument is DDC_FAST the function should increase + the Vsync frequency on DDC_SLOW it should restore the original + value. For convenience a generic ddc1SetSpeed() function is provided + in the vga module for VGA-like chipsets. + + void vgaHWddc1SetSpeed(ScrnInfoPtr pScrn, sf86ddcSpeed speed). + + To read out the DDC1 data the driver should call + + xf86MonPtr xf86DoEDID_DDC1(int scrnIndex, + void (*DDC1SetSpeed)(ScrnInfoPtr, xf86ddcSpeed), + unsigned int (*DDC1Read)(ScrnInfoPtr)) + + in PreInit(). DDC1SetSpeed is a pointer to the SetSpeed() + function, DDC1Read has to point to the DDC1 read function. + The function will return a pointer to the xf86Monitor structure + which contains all information retrieved by DDC. + NULL will be returned on failure. + + DDC2 Support + + To read out DDC2 information I2C has to be initialized first. + (See documentation for the i2c module). + The function + + xf86MonPtr xf86DoEDID_DDC2(int scrnIndex, I2CBusPtr pBus) + + is provided to read out and process DDC2 data. A pointer + to the I2CBusRec of the appropriate I2C Bus has to be passed + as the second argument. + The function will return a pointer to the xf86Monitor structure + which contains all information retrieved by DDC. + NULL will be returned on failure. + + Printing monitor parameters + + To print out the information contained in the xf86Monitor + structure the function + + xf86MonPtr xf86PrintEDID(xf86MonPtr monitor) + + is provided. + + Further processing of the xf86Monitor structure is not yet + implemented. However, it is planned to use the information + about video modes, gamma values etc. + Therefore it is strongly recommended to read out DDC data + before any video mode processing is done. + + + + +$XFree86: xc/programs/Xserver/hw/xfree86/ddc/DDC.HOWTO,v 1.2 1998/12/06 13:30:39 dawes Exp $ diff --git a/xorg-server/hw/xfree86/ddc/Makefile.am b/xorg-server/hw/xfree86/ddc/Makefile.am index 0db5d833f..93ea4a2a5 100644 --- a/xorg-server/hw/xfree86/ddc/Makefile.am +++ b/xorg-server/hw/xfree86/ddc/Makefile.am @@ -1,11 +1,11 @@ -sdk_HEADERS = edid.h xf86DDC.h - -noinst_LTLIBRARIES = libddc.la - -libddc_la_SOURCES = ddc.c interpret_edid.c print_edid.c ddcProperty.c - -INCLUDES = $(XORG_INCS) -I$(srcdir)/../i2c - -AM_CFLAGS = $(DIX_CFLAGS) $(XORG_CFLAGS) - -EXTRA_DIST = DDC.HOWTO +sdk_HEADERS = edid.h xf86DDC.h + +noinst_LTLIBRARIES = libddc.la + +libddc_la_SOURCES = ddc.c interpret_edid.c print_edid.c ddcProperty.c + +INCLUDES = $(XORG_INCS) -I$(srcdir)/../i2c + +AM_CFLAGS = $(DIX_CFLAGS) $(XORG_CFLAGS) + +EXTRA_DIST = DDC.HOWTO -- cgit v1.2.3