diff options
Diffstat (limited to 'xorg-server/hw/xfree86/ddc')
| -rw-r--r-- | xorg-server/hw/xfree86/ddc/Makefile.in | 41 | ||||
| -rw-r--r-- | xorg-server/hw/xfree86/ddc/ddcPriv.h | 9 | ||||
| -rw-r--r-- | xorg-server/hw/xfree86/ddc/edid.c | 140 | ||||
| -rw-r--r-- | xorg-server/hw/xfree86/ddc/xf86DDC.c | 341 |
4 files changed, 30 insertions, 501 deletions
diff --git a/xorg-server/hw/xfree86/ddc/Makefile.in b/xorg-server/hw/xfree86/ddc/Makefile.in index 750c9791c..8c4b56f29 100644 --- a/xorg-server/hw/xfree86/ddc/Makefile.in +++ b/xorg-server/hw/xfree86/ddc/Makefile.in @@ -62,16 +62,31 @@ libddc_la_LIBADD = am_libddc_la_OBJECTS = ddc.lo interpret_edid.lo print_edid.lo \ ddcProperty.lo libddc_la_OBJECTS = $(am_libddc_la_OBJECTS) +AM_V_lt = $(am__v_lt_$(V)) +am__v_lt_ = $(am__v_lt_$(AM_DEFAULT_VERBOSITY)) +am__v_lt_0 = --silent DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)/include depcomp = $(SHELL) $(top_srcdir)/depcomp am__depfiles_maybe = depfiles am__mv = mv -f COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +AM_V_CC = $(am__v_CC_$(V)) +am__v_CC_ = $(am__v_CC_$(AM_DEFAULT_VERBOSITY)) +am__v_CC_0 = @echo " CC " $@; +AM_V_at = $(am__v_at_$(V)) +am__v_at_ = $(am__v_at_$(AM_DEFAULT_VERBOSITY)) +am__v_at_0 = @ CCLD = $(CC) -LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \ - --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \ - $(LDFLAGS) -o $@ +LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \ + $(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \ + $(AM_LDFLAGS) $(LDFLAGS) -o $@ +AM_V_CCLD = $(am__v_CCLD_$(V)) +am__v_CCLD_ = $(am__v_CCLD_$(AM_DEFAULT_VERBOSITY)) +am__v_CCLD_0 = @echo " CCLD " $@; +AM_V_GEN = $(am__v_GEN_$(V)) +am__v_GEN_ = $(am__v_GEN_$(AM_DEFAULT_VERBOSITY)) +am__v_GEN_0 = @echo " GEN " $@; SOURCES = $(libddc_la_SOURCES) DIST_SOURCES = $(libddc_la_SOURCES) am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; @@ -105,9 +120,9 @@ ADMIN_MAN_DIR = @ADMIN_MAN_DIR@ ADMIN_MAN_SUFFIX = @ADMIN_MAN_SUFFIX@ ALLOCA = @ALLOCA@ AMTAR = @AMTAR@ +AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@ AM_MAKEFLAGS = @AM_MAKEFLAGS@ APPLE_APPLICATIONS_DIR = @APPLE_APPLICATIONS_DIR@ -APPLE_APPLICATION_ID = @APPLE_APPLICATION_ID@ APPLE_APPLICATION_NAME = @APPLE_APPLICATION_NAME@ APP_MAN_DIR = @APP_MAN_DIR@ APP_MAN_SUFFIX = @APP_MAN_SUFFIX@ @@ -196,6 +211,7 @@ KDRIVE_LIBS = @KDRIVE_LIBS@ KDRIVE_LOCAL_LIBS = @KDRIVE_LOCAL_LIBS@ KDRIVE_PURE_INCS = @KDRIVE_PURE_INCS@ KDRIVE_PURE_LIBS = @KDRIVE_PURE_LIBS@ +LAUNCHD_ID_PREFIX = @LAUNCHD_ID_PREFIX@ LD = @LD@ LDFLAGS = @LDFLAGS@ LD_EXPORT_SYMBOLS_FLAG = @LD_EXPORT_SYMBOLS_FLAG@ @@ -441,7 +457,7 @@ clean-noinstLTLIBRARIES: rm -f "$${dir}/so_locations"; \ done libddc.la: $(libddc_la_OBJECTS) $(libddc_la_DEPENDENCIES) - $(LINK) $(libddc_la_OBJECTS) $(libddc_la_LIBADD) $(LIBS) + $(AM_V_CCLD)$(LINK) $(libddc_la_OBJECTS) $(libddc_la_LIBADD) $(LIBS) mostlyclean-compile: -rm -f *.$(OBJEXT) @@ -455,22 +471,25 @@ distclean-compile: @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/print_edid.Plo@am__quote@ .c.o: -@am__fastdepCC_TRUE@ $(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $< -@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po +@am__fastdepCC_TRUE@ $(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $< +@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po +@am__fastdepCC_FALSE@ $(AM_V_CC) @AM_BACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ source='$<' object='$@' libtool=no @AMDEPBACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @am__fastdepCC_FALSE@ $(COMPILE) -c $< .c.obj: -@am__fastdepCC_TRUE@ $(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'` -@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po +@am__fastdepCC_TRUE@ $(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'` +@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po +@am__fastdepCC_FALSE@ $(AM_V_CC) @AM_BACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ source='$<' object='$@' libtool=no @AMDEPBACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @am__fastdepCC_FALSE@ $(COMPILE) -c `$(CYGPATH_W) '$<'` .c.lo: -@am__fastdepCC_TRUE@ $(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $< -@am__fastdepCC_TRUE@ $(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo +@am__fastdepCC_TRUE@ $(AM_V_CC)$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $< +@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo +@am__fastdepCC_FALSE@ $(AM_V_CC) @AM_BACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@ @AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@ @am__fastdepCC_FALSE@ $(LTCOMPILE) -c -o $@ $< diff --git a/xorg-server/hw/xfree86/ddc/ddcPriv.h b/xorg-server/hw/xfree86/ddc/ddcPriv.h deleted file mode 100644 index b5cb9b836..000000000 --- a/xorg-server/hw/xfree86/ddc/ddcPriv.h +++ /dev/null @@ -1,9 +0,0 @@ -extern unsigned char *GetEDID_DDC1( - unsigned int * -); - -extern int DDC_checksum( - unsigned char *, - int -); - diff --git a/xorg-server/hw/xfree86/ddc/edid.c b/xorg-server/hw/xfree86/ddc/edid.c deleted file mode 100644 index 3ebafbbba..000000000 --- a/xorg-server/hw/xfree86/ddc/edid.c +++ /dev/null @@ -1,140 +0,0 @@ - -/* edid.c: retrieve EDID record from raw DDC1 data stream: data - * is contained in an array of unsigned int each unsigned int - * contains one bit if bit is 0 unsigned int has to be zero else - * unsigned int > 0 - * - * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE> - */ -#ifdef HAVE_XORG_CONFIG_H -#include <xorg-config.h> -#endif - -#include "misc.h" -#include "xf86.h" -#include "xf86_OSproc.h" -#include "xf86DDC.h" -#include "ddcPriv.h" -#include <string.h> - -static int find_start(unsigned int *); -static unsigned char * find_header(unsigned char *); -static unsigned char * resort(unsigned char *); - -unsigned char * -GetEDID_DDC1(unsigned int *s_ptr) -{ - unsigned char *d_block, *d_pos; - unsigned int *s_pos, *s_end; - int s_start; - int i,j; - s_start = find_start(s_ptr); - if (s_start==-1) return NULL; - s_end = s_ptr + NUM; - s_pos = s_ptr + s_start; - d_block=xalloc(EDID1_LEN); - if (!d_block) return NULL; - d_pos = d_block; - for (i=0;i<EDID1_LEN;i++) { - for (j=0;j<8;j++) { - *d_pos <<= 1; - if (*s_pos) { - *d_pos |= 0x01; - } - s_pos++; if (s_pos == s_end) s_pos=s_ptr; - }; - s_pos++; if (s_pos == s_end) s_pos=s_ptr; - d_pos++; - } - xfree(s_ptr); - if (d_block && DDC_checksum(d_block,EDID1_LEN)) return NULL; - return (resort(d_block)); -} - -int -DDC_checksum(unsigned char *block, int len) -{ - int i, result = 0; - int not_null = 0; - - for (i=0;i<len;i++) { - not_null |= block[i]; - result += block[i]; - } - -#ifdef DEBUG - if (result & 0xFF) ErrorF("DDC checksum not correct\n"); - if (!not_null) ErrorF("DDC read all Null\n"); -#endif - - /* catch the trivial case where all bytes are 0 */ - if (!not_null) return 1; - - return (result&0xFF); -} - -static int -find_start(unsigned int *ptr) -{ - unsigned int comp[9], test[9]; - int i,j; - - for (i=0;i<9;i++){ - comp[i] = *(ptr++); - test[i] = 1; - } - for (i=0;i<127;i++){ - for (j=0;j<9;j++){ - test[j] = test[j] & !(comp[j] ^ *(ptr++)); - } - } - for (i=0;i<9;i++) - if (test[i]) return (i+1); - return (-1); -} - -static unsigned char * -find_header(unsigned char *block) -{ - unsigned char *ptr, *head_ptr, *end; - unsigned char header[]={0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00}; - - ptr = block; - end = block + EDID1_LEN; - while (ptr<end) { - int i; - head_ptr = ptr; - for (i=0;i<8;i++){ - if (header[i] != *(head_ptr++)) break; - if (head_ptr == end) head_ptr = block; - } - if (i==8) break; - ptr++; - } - if (ptr == end) return (NULL); - return (ptr); -} - -static unsigned char * -resort(unsigned char *s_block) -{ - unsigned char *d_new, *d_ptr, *d_end, *s_ptr, *s_end; - unsigned char tmp; - - s_end = s_block + EDID1_LEN; - d_new = xalloc(EDID1_LEN); - if (!d_new) return NULL; - d_end = d_new + EDID1_LEN; - - s_ptr = find_header(s_block); - if (!s_ptr) return NULL; - for (d_ptr=d_new;d_ptr<d_end;d_ptr++){ - tmp = *(s_ptr++); - *d_ptr = tmp; - if (s_ptr == s_end) s_ptr = s_block; - } - xfree(s_block); - return (d_new); -} - - diff --git a/xorg-server/hw/xfree86/ddc/xf86DDC.c b/xorg-server/hw/xfree86/ddc/xf86DDC.c deleted file mode 100644 index 0d8677637..000000000 --- a/xorg-server/hw/xfree86/ddc/xf86DDC.c +++ /dev/null @@ -1,341 +0,0 @@ -/* xf86DDC.c - * - * Copyright 1998,1999 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE> - */ - -/* - * Note that DDC1 does not define any method for returning blocks beyond - * the first. DDC2 does, but the original implementation would only ever - * read the first block. If you want to read and parse all blocks, use - * xf86DoEEDID(). - */ - -#ifdef HAVE_XORG_CONFIG_H -#include <xorg-config.h> -#endif - -#include "misc.h" -#include "xf86.h" -#include "xf86_OSproc.h" -#include "xf86DDC.h" -#include "ddcPriv.h" -#include <string.h> - -#define RETRIES 4 - -static unsigned char *EDIDRead_DDC1( - ScrnInfoPtr pScrn, - DDC1SetSpeedProc, - unsigned int (*)(ScrnInfoPtr) -); - -static Bool TestDDC1( - ScrnInfoPtr pScrn, - unsigned int (*)(ScrnInfoPtr) -); - -static unsigned int *FetchEDID_DDC1( - ScrnInfoPtr, - register unsigned int (*)(ScrnInfoPtr) -); - -typedef enum { - DDCOPT_NODDC1, - DDCOPT_NODDC2, - DDCOPT_NODDC -} DDCOpts; - -static const OptionInfoRec DDCOptions[] = { - { DDCOPT_NODDC1, "NoDDC1", OPTV_BOOLEAN, {0}, FALSE }, - { DDCOPT_NODDC2, "NoDDC2", OPTV_BOOLEAN, {0}, FALSE }, - { DDCOPT_NODDC, "NoDDC", OPTV_BOOLEAN, {0}, FALSE }, - { -1, NULL, OPTV_NONE, {0}, FALSE }, -}; - -/** - * Attempts to probe the monitor for EDID information, if NoDDC and NoDDC1 are - * unset. EDID information blocks are interpreted and the results returned in - * an xf86MonPtr. - * - * This function does not affect the list of modes used by drivers -- it is up - * to the driver to decide policy on what to do with EDID information. - * - * @return pointer to a new xf86MonPtr containing the EDID information. - * @return NULL if no monitor attached or failure to interpret the EDID. - */ -xf86MonPtr -xf86DoEDID_DDC1( - int scrnIndex, DDC1SetSpeedProc DDC1SetSpeed, - unsigned int (*DDC1Read)(ScrnInfoPtr) -) -{ - ScrnInfoPtr pScrn = xf86Screens[scrnIndex]; - unsigned char *EDID_block = NULL; - xf86MonPtr tmp = NULL; - int sigio; - /* Default DDC and DDC1 to enabled. */ - Bool noddc = FALSE, noddc1 = FALSE; - OptionInfoPtr options; - - options = xnfalloc(sizeof(DDCOptions)); - (void)memcpy(options, DDCOptions, sizeof(DDCOptions)); - xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, options); - - xf86GetOptValBool(options, DDCOPT_NODDC, &noddc); - xf86GetOptValBool(options, DDCOPT_NODDC1, &noddc1); - xfree(options); - - if (noddc || noddc1) - return NULL; - - sigio = xf86BlockSIGIO(); - EDID_block = EDIDRead_DDC1(pScrn,DDC1SetSpeed,DDC1Read); - xf86UnblockSIGIO(sigio); - - if (EDID_block){ - tmp = xf86InterpretEDID(scrnIndex,EDID_block); - } -#ifdef DEBUG - else ErrorF("No EDID block returned\n"); - if (!tmp) - ErrorF("Cannot interpret EDID block\n"); -#endif - return tmp; -} - -static I2CDevPtr -DDC2MakeDevice(I2CBusPtr pBus, int address, char *name) -{ - I2CDevPtr dev = NULL; - - if (!(dev = xf86I2CFindDev(pBus, address))) { - dev = xf86CreateI2CDevRec(); - dev->DevName = name; - dev->SlaveAddr = address; - dev->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */ - dev->StartTimeout = 550; - dev->BitTimeout = 40; - dev->AcknTimeout = 40; - - dev->pI2CBus = pBus; - if (!xf86I2CDevInit(dev)) { - xf86DrvMsg(pBus->scrnIndex, X_PROBED, "No DDC2 device\n"); - return NULL; - } - } - - return dev; -} - -static I2CDevPtr -DDC2Init(int scrnIndex, I2CBusPtr pBus) -{ - I2CDevPtr dev = NULL; - - /* - * Slow down the bus so that older monitors don't - * miss things. - */ - pBus->RiseFallTime = 20; - - DDC2MakeDevice(pBus, 0x0060, "E-EDID segment register"); - dev = DDC2MakeDevice(pBus, 0x00A0, "ddc2"); - - return dev; -} - -/* Mmmm, smell the hacks */ -static void -EEDIDStop(I2CDevPtr d) -{ -} - -/* block is the EDID block number. a segment is two blocks. */ -static Bool -DDC2Read(I2CDevPtr dev, int block, unsigned char *R_Buffer) -{ - unsigned char W_Buffer[1]; - int i, segment; - I2CDevPtr seg; - void (*stop)(I2CDevPtr); - - for (i = 0; i < RETRIES; i++) { - /* Stop bits reset the segment pointer to 0, so be careful here. */ - segment = block >> 1; - if (segment) { - Bool b; - - if (!(seg = xf86I2CFindDev(dev->pI2CBus, 0x0060))) - return FALSE; - - W_Buffer[0] = segment; - - stop = dev->pI2CBus->I2CStop; - dev->pI2CBus->I2CStop = EEDIDStop; - - b = xf86I2CWriteRead(seg, W_Buffer, 1, NULL, 0); - - dev->pI2CBus->I2CStop = stop; - if (!b) { - dev->pI2CBus->I2CStop(dev); - continue; - } - } - - W_Buffer[0] = (block & 0x01) * EDID1_LEN; - - if (xf86I2CWriteRead(dev, W_Buffer, 1, R_Buffer, EDID1_LEN)) { - if (!DDC_checksum(R_Buffer, EDID1_LEN)) - return TRUE; - } - } - - return FALSE; -} - -/** - * Attempts to probe the monitor for EDID information, if NoDDC and NoDDC2 are - * unset. EDID information blocks are interpreted and the results returned in - * an xf86MonPtr. Unlike xf86DoEDID_DDC[12](), this function will return - * the complete EDID data, including all extension blocks, if the 'complete' - * parameter is TRUE; - * - * This function does not affect the list of modes used by drivers -- it is up - * to the driver to decide policy on what to do with EDID information. - * - * @return pointer to a new xf86MonPtr containing the EDID information. - * @return NULL if no monitor attached or failure to interpret the EDID. - */ -xf86MonPtr -xf86DoEEDID(int scrnIndex, I2CBusPtr pBus, Bool complete) -{ - ScrnInfoPtr pScrn = xf86Screens[scrnIndex]; - unsigned char *EDID_block = NULL; - xf86MonPtr tmp = NULL; - I2CDevPtr dev = NULL; - /* Default DDC and DDC2 to enabled. */ - Bool noddc = FALSE, noddc2 = FALSE; - OptionInfoPtr options; - - options = xalloc(sizeof(DDCOptions)); - if (!options) - return NULL; - memcpy(options, DDCOptions, sizeof(DDCOptions)); - xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, options); - - xf86GetOptValBool(options, DDCOPT_NODDC, &noddc); - xf86GetOptValBool(options, DDCOPT_NODDC2, &noddc2); - xfree(options); - - if (noddc || noddc2) - return NULL; - - if (!(dev = DDC2Init(scrnIndex, pBus))) - return NULL; - - EDID_block = xcalloc(1, EDID1_LEN); - if (!EDID_block) - return NULL; - - if (DDC2Read(dev, 0, EDID_block)) { - int i, n = EDID_block[0x7e]; - - if (complete && n) { - EDID_block = xrealloc(EDID_block, EDID1_LEN * (1+n)); - - for (i = 0; i < n; i++) - DDC2Read(dev, i+1, EDID_block + (EDID1_LEN * (1+i))); - } - - tmp = xf86InterpretEEDID(scrnIndex, EDID_block); - } - - if (tmp && complete) - tmp->flags |= EDID_COMPLETE_RAWDATA; - - return tmp; -} - -/** - * Attempts to probe the monitor for EDID information, if NoDDC and NoDDC2 are - * unset. EDID information blocks are interpreted and the results returned in - * an xf86MonPtr. - * - * This function does not affect the list of modes used by drivers -- it is up - * to the driver to decide policy on what to do with EDID information. - * - * @return pointer to a new xf86MonPtr containing the EDID information. - * @return NULL if no monitor attached or failure to interpret the EDID. - */ -xf86MonPtr -xf86DoEDID_DDC2(int scrnIndex, I2CBusPtr pBus) -{ - return xf86DoEEDID(scrnIndex, pBus, FALSE); -} - -/* - * read EDID record , pass it to callback function to interpret. - * callback function will store it for further use by calling - * function; it will also decide if we need to reread it - */ -static unsigned char * -EDIDRead_DDC1(ScrnInfoPtr pScrn, DDC1SetSpeedProc DDCSpeed, - unsigned int (*read_DDC)(ScrnInfoPtr)) -{ - unsigned char *EDID_block = NULL; - int count = RETRIES; - - if (!read_DDC) { - xf86DrvMsg(pScrn->scrnIndex, X_PROBED, - "chipset doesn't support DDC1\n"); - return NULL; - }; - - if (TestDDC1(pScrn,read_DDC)==-1) { - xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "No DDC signal\n"); - return NULL; - }; - - if (DDCSpeed) DDCSpeed(pScrn,DDC_FAST); - do { - EDID_block = GetEDID_DDC1(FetchEDID_DDC1(pScrn,read_DDC)); - count --; - } while (!EDID_block && count); - if (DDCSpeed) DDCSpeed(pScrn,DDC_SLOW); - - return EDID_block; -} - -/* test if DDC1 return 0 if not */ -static Bool -TestDDC1(ScrnInfoPtr pScrn, unsigned int (*read_DDC)(ScrnInfoPtr)) -{ - int old, count; - - old = read_DDC(pScrn); - count = HEADER * BITS_PER_BYTE; - do { - /* wait for next retrace */ - if (old != read_DDC(pScrn)) break; - } while(count--); - return (count); -} - -/* fetch entire EDID record; DDC bit needs to be masked */ -static unsigned int * -FetchEDID_DDC1(register ScrnInfoPtr pScrn, - register unsigned int (*read_DDC)(ScrnInfoPtr)) -{ - int count = NUM; - unsigned int *ptr, *xp; - - ptr=xp=xalloc(sizeof(int)*NUM); - - if (!ptr) return NULL; - do { - /* wait for next retrace */ - *xp = read_DDC(pScrn); - xp++; - } while(--count); - return (ptr); -} |