// SPDX-License-Identifier: GPL-2.0
#include "radeonfb.h"
#include <linux/slab.h>
#include "../edid.h"
static const struct fb_var_screeninfo radeonfb_default_var = {
.xres = 640 ,
.yres = 480 ,
.xres_virtual = 640 ,
.yres_virtual = 480 ,
.bits_per_pixel = 8 ,
.red = { .length = 8 },
.green = { .length = 8 },
.blue = { .length = 8 },
.activate = FB_ACTIVATE_NOW,
.height = -1 ,
.width = -1 ,
.pixclock = 39721 ,
.left_margin = 40 ,
.right_margin = 24 ,
.upper_margin = 32 ,
.lower_margin = 11 ,
.hsync_len = 96 ,
.vsync_len = 2 ,
.vmode = FB_VMODE_NONINTERLACED
};
static char *radeon_get_mon_name(int type)
{
char *pret = NULL;
switch (type) {
case MT_NONE:
pret = "no" ;
break ;
case MT_CRT:
pret = "CRT" ;
break ;
case MT_DFP:
pret = "DFP" ;
break ;
case MT_LCD:
pret = "LCD" ;
break ;
case MT_CTV:
pret = "CTV" ;
break ;
case MT_STV:
pret = "STV" ;
break ;
}
return pret;
}
#if defined (CONFIG_PPC) || defined (CONFIG_SPARC)
/*
* Try to find monitor informations & EDID data out of the Open Firmware
* device - tree . This also contains some " hacks " to work around a few machine
* models with broken OF probing by hard - coding known EDIDs for some Mac
* laptops internal LVDS panel . ( XXX : not done yet )
*/
static int radeon_parse_montype_prop(struct device_node *dp, u8 **out_EDID,
int hdno)
{
static char *propnames[] = { "DFP,EDID" , "LCD,EDID" , "EDID" ,
"EDID1" , "EDID2" , NULL };
const u8 *pedid = NULL;
const u8 *pmt = NULL;
u8 *tmp;
int i, mt = MT_NONE;
pr_debug("analyzing OF properties...\n" );
pmt = of_get_property(dp, "display-type" , NULL);
if (!pmt)
return MT_NONE;
pr_debug("display-type: %s\n" , pmt);
/* OF says "LCD" for DFP as well, we discriminate from the caller of this
* function
*/
if (!strcmp(pmt, "LCD" ) || !strcmp(pmt, "DFP" ))
mt = MT_DFP;
else if (!strcmp(pmt, "CRT" ))
mt = MT_CRT;
else {
if (strcmp(pmt, "NONE" ) != 0 )
printk(KERN_WARNING "radeonfb: Unknown OF display-type: %s\n" ,
pmt);
return MT_NONE;
}
for (i = 0 ; propnames[i] != NULL; ++i) {
pedid = of_get_property(dp, propnames[i], NULL);
if (pedid != NULL)
break ;
}
/* We didn't find the EDID in the leaf node, some cards will actually
* put EDID1 / EDID2 in the parent , look for these ( typically M6 tipb ) .
* single - head cards have hdno = = - 1 and skip this step
*/
if (pedid == NULL && dp->parent && (hdno != -1 ))
pedid = of_get_property(dp->parent,
(hdno == 0 ) ? "EDID1" : "EDID2" , NULL);
if (pedid == NULL && dp->parent && (hdno == 0 ))
pedid = of_get_property(dp->parent, "EDID" , NULL);
if (pedid == NULL)
return mt;
tmp = kmemdup(pedid, EDID_LENGTH, GFP_KERNEL);
if (!tmp)
return mt;
*out_EDID = tmp;
return mt;
}
static int radeon_probe_OF_head(struct radeonfb_info *rinfo, int head_no,
u8 **out_EDID)
{
struct device_node *dp;
pr_debug("radeon_probe_OF_head\n" );
dp = rinfo->of_node;
while (dp == NULL)
return MT_NONE;
if (rinfo->has_CRTC2) {
const char *pname;
int len, second = 0 ;
dp = dp->child;
do {
if (!dp)
return MT_NONE;
pname = of_get_property(dp, "name" , NULL);
if (!pname)
return MT_NONE;
len = strlen(pname);
pr_debug("head: %s (letter: %c, head_no: %d)\n" ,
pname, pname[len-1 ], head_no);
if (pname[len-1 ] == 'A' && head_no == 0 ) {
int mt = radeon_parse_montype_prop(dp, out_EDID, 0 );
/* Maybe check for LVDS_GEN_CNTL here ? I need to check out
* what OF does when booting with lid closed
*/
if (mt == MT_DFP && rinfo->is_mobility)
mt = MT_LCD;
return mt;
} else if (pname[len-1 ] == 'B' && head_no == 1 )
return radeon_parse_montype_prop(dp, out_EDID, 1 );
second = 1 ;
dp = dp->sibling;
} while (!second);
} else {
if (head_no > 0 )
return MT_NONE;
return radeon_parse_montype_prop(dp, out_EDID, -1 );
}
return MT_NONE;
}
#endif /* CONFIG_PPC || CONFIG_SPARC */
static int radeon_get_panel_info_BIOS(struct radeonfb_info *rinfo)
{
unsigned long tmp, tmp0;
char stmp[30 ];
int i;
if (!rinfo->bios_seg)
return 0 ;
if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0 x40))) {
printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n" );
rinfo->panel_info.pwr_delay = 200 ;
return 0 ;
}
for (i=0 ; i<24 ; i++)
stmp[i] = BIOS_IN8(tmp+i+1 );
stmp[24 ] = 0 ;
printk("radeonfb: panel ID string: %s\n" , stmp);
rinfo->panel_info.xres = BIOS_IN16(tmp + 25 );
rinfo->panel_info.yres = BIOS_IN16(tmp + 27 );
printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n" ,
rinfo->panel_info.xres, rinfo->panel_info.yres);
rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44 );
pr_debug("BIOS provided panel power delay: %d\n" , rinfo->panel_info.pwr_delay);
if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0 )
rinfo->panel_info.pwr_delay = 2000 ;
/*
* Some panels only work properly with some divider combinations
*/
rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46 );
rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48 );
rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49 );
if (rinfo->panel_info.ref_divider != 0 &&
rinfo->panel_info.fbk_divider > 3 ) {
rinfo->panel_info.use_bios_dividers = 1 ;
printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n" );
pr_debug("ref_divider = %x\n" , rinfo->panel_info.ref_divider);
pr_debug("post_divider = %x\n" , rinfo->panel_info.post_divider);
pr_debug("fbk_divider = %x\n" , rinfo->panel_info.fbk_divider);
}
pr_debug("Scanning BIOS table ...\n" );
for (i=0 ; i<32 ; i++) {
tmp0 = BIOS_IN16(tmp+64 +i*2 );
if (tmp0 == 0 )
break ;
pr_debug(" %d x %d\n" , BIOS_IN16(tmp0), BIOS_IN16(tmp0+2 ));
if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
(BIOS_IN16(tmp0+2 ) == rinfo->panel_info.yres)) {
rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17 ) - BIOS_IN16(tmp0+19 )) * 8 ;
rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21 ) -
BIOS_IN16(tmp0+19 ) -1 ) * 8 ) & 0 x7fff;
rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23 ) * 8 ;
rinfo->panel_info.vblank = BIOS_IN16(tmp0+24 ) - BIOS_IN16(tmp0+26 );
rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28 ) & 0 x7ff) - BIOS_IN16(tmp0+26 );
rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28 ) & 0 xf800) >> 11 ;
rinfo->panel_info.clock = BIOS_IN16(tmp0+9 );
/* Assume high active syncs for now until ATI tells me more... maybe we
* can probe register values here ?
*/
rinfo->panel_info.hAct_high = 1 ;
rinfo->panel_info.vAct_high = 1 ;
/* Mark panel infos valid */
rinfo->panel_info.valid = 1 ;
pr_debug("Found panel in BIOS table:\n" );
pr_debug(" hblank: %d\n" , rinfo->panel_info.hblank);
pr_debug(" hOver_plus: %d\n" , rinfo->panel_info.hOver_plus);
pr_debug(" hSync_width: %d\n" , rinfo->panel_info.hSync_width);
pr_debug(" vblank: %d\n" , rinfo->panel_info.vblank);
pr_debug(" vOver_plus: %d\n" , rinfo->panel_info.vOver_plus);
pr_debug(" vSync_width: %d\n" , rinfo->panel_info.vSync_width);
pr_debug(" clock: %d\n" , rinfo->panel_info.clock);
return 1 ;
}
}
pr_debug("Didn't find panel in BIOS table !\n" );
return 0 ;
}
/* Try to extract the connector informations from the BIOS. This
* doesn ' t quite work yet , but it ' s output is still useful for
* debugging
*/
static void radeon_parse_connector_info(struct radeonfb_info *rinfo)
{
int offset, chips, connectors, tmp, i, conn, type;
static char * __conn_type_table[16 ] = {
"NONE" , "Proprietary" , "CRT" , "DVI-I" , "DVI-D" , "Unknown" , "Unknown" ,
"Unknown" , "Unknown" , "Unknown" , "Unknown" , "Unknown" , "Unknown" ,
"Unknown" , "Unknown" , "Unknown"
};
if (!rinfo->bios_seg)
return ;
offset = BIOS_IN16(rinfo->fp_bios_start + 0 x50);
if (offset == 0 ) {
printk(KERN_WARNING "radeonfb: No connector info table detected\n" );
return ;
}
/* Don't do much more at this point but displaying the data if
* DEBUG is enabled
*/
chips = BIOS_IN8(offset++) >> 4 ;
pr_debug("%d chips in connector info\n" , chips);
for (i = 0 ; i < chips; i++) {
tmp = BIOS_IN8(offset++);
connectors = tmp & 0 x0f;
pr_debug(" - chip %d has %d connectors\n" , tmp >> 4 , connectors);
for (conn = 0 ; ; conn++) {
tmp = BIOS_IN16(offset);
if (tmp == 0 )
break ;
offset += 2 ;
type = (tmp >> 12 ) & 0 x0f;
pr_debug(" * connector %d of type %d (%s) : %04x\n" ,
conn, type, __conn_type_table[type], tmp);
}
}
}
/*
* Probe physical connection of a CRT . This code comes from XFree
* as well and currently is only implemented for the CRT DAC , the
* code for the TVDAC is commented out in XFree as " non working "
*/
static int radeon_crt_is_connected(struct radeonfb_info *rinfo, int is_crt_dac)
{
int connected = 0 ;
/* the monitor either wasn't connected or it is a non-DDC CRT.
* try to probe it
*/
if (is_crt_dac) {
unsigned long ulOrigVCLK_ECP_CNTL;
unsigned long ulOrigDAC_CNTL;
unsigned long ulOrigDAC_EXT_CNTL;
unsigned long ulOrigCRTC_EXT_CNTL;
unsigned long ulData;
unsigned long ulMask;
ulOrigVCLK_ECP_CNTL = INPLL(VCLK_ECP_CNTL);
ulData = ulOrigVCLK_ECP_CNTL;
ulData &= ~(PIXCLK_ALWAYS_ONb
| PIXCLK_DAC_ALWAYS_ONb);
ulMask = ~(PIXCLK_ALWAYS_ONb
| PIXCLK_DAC_ALWAYS_ONb);
OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
ulOrigCRTC_EXT_CNTL = INREG(CRTC_EXT_CNTL);
ulData = ulOrigCRTC_EXT_CNTL;
ulData |= CRTC_CRT_ON;
OUTREG(CRTC_EXT_CNTL, ulData);
ulOrigDAC_EXT_CNTL = INREG(DAC_EXT_CNTL);
ulData = ulOrigDAC_EXT_CNTL;
ulData &= ~DAC_FORCE_DATA_MASK;
ulData |= (DAC_FORCE_BLANK_OFF_EN
|DAC_FORCE_DATA_EN
|DAC_FORCE_DATA_SEL_MASK);
if ((rinfo->family == CHIP_FAMILY_RV250) ||
(rinfo->family == CHIP_FAMILY_RV280))
ulData |= (0 x01b6 << DAC_FORCE_DATA_SHIFT);
else
ulData |= (0 x01ac << DAC_FORCE_DATA_SHIFT);
OUTREG(DAC_EXT_CNTL, ulData);
ulOrigDAC_CNTL = INREG(DAC_CNTL);
ulData = ulOrigDAC_CNTL;
ulData |= DAC_CMP_EN;
ulData &= ~(DAC_RANGE_CNTL_MASK
| DAC_PDWN);
ulData |= 0 x2;
OUTREG(DAC_CNTL, ulData);
mdelay(1 );
ulData = INREG(DAC_CNTL);
connected = (DAC_CMP_OUTPUT & ulData) ? 1 : 0 ;
ulData = ulOrigVCLK_ECP_CNTL;
ulMask = 0 xFFFFFFFFL;
OUTPLLP(VCLK_ECP_CNTL, ulData, ulMask);
OUTREG(DAC_CNTL, ulOrigDAC_CNTL );
OUTREG(DAC_EXT_CNTL, ulOrigDAC_EXT_CNTL );
OUTREG(CRTC_EXT_CNTL, ulOrigCRTC_EXT_CNTL);
}
return connected ? MT_CRT : MT_NONE;
}
/*
* Parse the " monitor_layout " string if any . This code is mostly
* copied from XFree ' s radeon driver
*/
static int radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
const char *monitor_layout)
{
char s1[5 ], s2[5 ];
int i = 0 , second = 0 ;
const char *s;
if (!monitor_layout)
return 0 ;
s = monitor_layout;
do {
switch (*s) {
case ',' :
s1[i] = '\0' ;
i = 0 ;
second = 1 ;
break ;
case ' ' :
case '\0' :
break ;
default :
if (i > 4 )
break ;
if (second)
s2[i] = *s;
else
s1[i] = *s;
i++;
}
if (i > 4 )
i = 4 ;
} while (*s++);
if (second)
s2[i] = 0 ;
else {
s1[i] = 0 ;
s2[0 ] = 0 ;
}
if (strcmp(s1, "CRT" ) == 0 )
rinfo->mon1_type = MT_CRT;
else if (strcmp(s1, "TMDS" ) == 0 )
rinfo->mon1_type = MT_DFP;
else if (strcmp(s1, "LVDS" ) == 0 )
rinfo->mon1_type = MT_LCD;
if (strcmp(s2, "CRT" ) == 0 )
rinfo->mon2_type = MT_CRT;
else if (strcmp(s2, "TMDS" ) == 0 )
rinfo->mon2_type = MT_DFP;
else if (strcmp(s2, "LVDS" ) == 0 )
rinfo->mon2_type = MT_LCD;
return 1 ;
}
/*
* Probe display on both primary and secondary card ' s connector ( if any )
* by various available techniques ( i2c , OF device tree , BIOS , . . . ) and
* try to retrieve EDID . The algorithm here comes from XFree ' s radeon
* driver
*/
void radeon_probe_screens(struct radeonfb_info *rinfo,
const char *monitor_layout, int ignore_edid)
{
#ifdef CONFIG_FB_RADEON_I2C
int ddc_crt2_used = 0 ;
#endif
int tmp, i;
radeon_parse_connector_info(rinfo);
if (radeon_parse_monitor_layout(rinfo, monitor_layout)) {
/*
* If user specified a monitor_layout option , use it instead
* of auto - detecting . Maybe we should only use this argument
* on the first radeon card probed or provide a way to specify
* a layout for each card ?
*/
pr_debug("Using specified monitor layout: %s" , monitor_layout);
#ifdef CONFIG_FB_RADEON_I2C
if (!ignore_edid) {
if (rinfo->mon1_type != MT_NONE)
if (!radeon_probe_i2c_connector(rinfo, ddc_dvi, &rinfo->mon1_EDID)) {
radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon1_EDID);
ddc_crt2_used = 1 ;
}
if (rinfo->mon2_type != MT_NONE)
if (!radeon_probe_i2c_connector(rinfo, ddc_vga, &rinfo->mon2_EDID) &&
!ddc_crt2_used)
radeon_probe_i2c_connector(rinfo, ddc_crt2, &rinfo->mon2_EDID);
}
#endif /* CONFIG_FB_RADEON_I2C */
if (rinfo->mon1_type == MT_NONE) {
if (rinfo->mon2_type != MT_NONE) {
rinfo->mon1_type = rinfo->mon2_type;
rinfo->mon1_EDID = rinfo->mon2_EDID;
} else {
rinfo->mon1_type = MT_CRT;
printk(KERN_INFO "radeonfb: No valid monitor, assuming CRT on first port\n" );
}
rinfo->mon2_type = MT_NONE;
rinfo->mon2_EDID = NULL;
}
} else {
/*
* Auto - detecting display type ( well . . . trying to . . . )
*/
pr_debug("Starting monitor auto detection...\n" );
#if defined (DEBUG) && defined (CONFIG_FB_RADEON_I2C)
{
u8 *EDIDs[4 ] = { NULL, NULL, NULL, NULL };
int i;
for (i = 0 ; i < 4 ; i++)
radeon_probe_i2c_connector(rinfo, i + 1 , &EDIDs[i]);
}
#endif /* DEBUG */
/*
* Old single head cards
*/
if (!rinfo->has_CRTC2) {
#if defined (CONFIG_PPC) || defined (CONFIG_SPARC)
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0 ,
&rinfo->mon1_EDID);
#endif /* CONFIG_PPC || CONFIG_SPARC */
#ifdef CONFIG_FB_RADEON_I2C
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type =
radeon_probe_i2c_connector(rinfo, ddc_dvi,
&rinfo->mon1_EDID);
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type =
radeon_probe_i2c_connector(rinfo, ddc_vga,
&rinfo->mon1_EDID);
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type =
radeon_probe_i2c_connector(rinfo, ddc_crt2,
&rinfo->mon1_EDID);
#endif /* CONFIG_FB_RADEON_I2C */
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type = MT_CRT;
goto bail;
}
/*
* Check for cards with reversed DACs or TMDS controllers using BIOS
*/
if (rinfo->bios_seg &&
(tmp = BIOS_IN16(rinfo->fp_bios_start + 0 x50))) {
for (i = 1 ; i < 4 ; i++) {
unsigned int tmp0;
if (!BIOS_IN8(tmp + i*2 ) && i > 1 )
break ;
tmp0 = BIOS_IN16(tmp + i*2 );
if ((!(tmp0 & 0 x01)) && (((tmp0 >> 8 ) & 0 x0f) == ddc_dvi)) {
rinfo->reversed_DAC = 1 ;
printk(KERN_INFO "radeonfb: Reversed DACs detected\n" );
}
if ((((tmp0 >> 8 ) & 0 x0f) == ddc_dvi) && ((tmp0 >> 4 ) & 0 x01)) {
rinfo->reversed_TMDS = 1 ;
printk(KERN_INFO "radeonfb: Reversed TMDS detected\n" );
}
}
}
/*
* Probe primary head ( DVI or laptop internal panel )
*/
#if defined (CONFIG_PPC) || defined (CONFIG_SPARC)
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type = radeon_probe_OF_head(rinfo, 0 ,
&rinfo->mon1_EDID);
#endif /* CONFIG_PPC || CONFIG_SPARC */
#ifdef CONFIG_FB_RADEON_I2C
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_dvi,
&rinfo->mon1_EDID);
if (rinfo->mon1_type == MT_NONE) {
rinfo->mon1_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
&rinfo->mon1_EDID);
if (rinfo->mon1_type != MT_NONE)
ddc_crt2_used = 1 ;
}
#endif /* CONFIG_FB_RADEON_I2C */
if (rinfo->mon1_type == MT_NONE && rinfo->is_mobility &&
((rinfo->bios_seg && (INREG(BIOS_4_SCRATCH) & 4 ))
|| (INREG(LVDS_GEN_CNTL) & LVDS_ON))) {
rinfo->mon1_type = MT_LCD;
printk("Non-DDC laptop panel detected\n" );
}
if (rinfo->mon1_type == MT_NONE)
rinfo->mon1_type = radeon_crt_is_connected(rinfo, rinfo->reversed_DAC);
/*
* Probe secondary head ( mostly VGA , can be DVI )
*/
#if defined (CONFIG_PPC) || defined (CONFIG_SPARC)
if (rinfo->mon2_type == MT_NONE)
rinfo->mon2_type = radeon_probe_OF_head(rinfo, 1 ,
&rinfo->mon2_EDID);
#endif /* CONFIG_PPC || defined(CONFIG_SPARC) */
#ifdef CONFIG_FB_RADEON_I2C
if (rinfo->mon2_type == MT_NONE)
rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_vga,
&rinfo->mon2_EDID);
if (rinfo->mon2_type == MT_NONE && !ddc_crt2_used)
rinfo->mon2_type = radeon_probe_i2c_connector(rinfo, ddc_crt2,
&rinfo->mon2_EDID);
#endif /* CONFIG_FB_RADEON_I2C */
if (rinfo->mon2_type == MT_NONE)
rinfo->mon2_type = radeon_crt_is_connected(rinfo, !rinfo->reversed_DAC);
/*
* If we only detected port 2 , we swap them , if none detected ,
* assume CRT ( maybe fallback to old BIOS_SCRATCH stuff ? or look
* at FP registers ? )
*/
if (rinfo->mon1_type == MT_NONE) {
if (rinfo->mon2_type != MT_NONE) {
rinfo->mon1_type = rinfo->mon2_type;
rinfo->mon1_EDID = rinfo->mon2_EDID;
} else
rinfo->mon1_type = MT_CRT;
rinfo->mon2_type = MT_NONE;
rinfo->mon2_EDID = NULL;
}
/*
* Deal with reversed TMDS
*/
if (rinfo->reversed_TMDS) {
/* Always keep internal TMDS as primary head */
if (rinfo->mon1_type == MT_DFP || rinfo->mon2_type == MT_DFP) {
int tmp_type = rinfo->mon1_type;
u8 *tmp_EDID = rinfo->mon1_EDID;
rinfo->mon1_type = rinfo->mon2_type;
rinfo->mon1_EDID = rinfo->mon2_EDID;
rinfo->mon2_type = tmp_type;
rinfo->mon2_EDID = tmp_EDID;
if (rinfo->mon1_type == MT_CRT || rinfo->mon2_type == MT_CRT)
rinfo->reversed_DAC ^= 1 ;
}
}
}
if (ignore_edid) {
kfree(rinfo->mon1_EDID);
rinfo->mon1_EDID = NULL;
kfree(rinfo->mon2_EDID);
rinfo->mon2_EDID = NULL;
}
bail:
printk(KERN_INFO "radeonfb: Monitor 1 type %s found\n" ,
radeon_get_mon_name(rinfo->mon1_type));
if (rinfo->mon1_EDID)
printk(KERN_INFO "radeonfb: EDID probed\n" );
if (!rinfo->has_CRTC2)
return ;
printk(KERN_INFO "radeonfb: Monitor 2 type %s found\n" ,
radeon_get_mon_name(rinfo->mon2_type));
if (rinfo->mon2_EDID)
printk(KERN_INFO "radeonfb: EDID probed\n" );
}
/*
* This function applies any arch / model / machine specific fixups
* to the panel info . It may eventually alter EDID block as
* well or whatever is specific to a given model and not probed
* properly by the default code
*/
static void radeon_fixup_panel_info(struct radeonfb_info *rinfo)
{
#ifdef CONFIG_PPC
/*
* LCD Flat panels should use fixed dividers , we enfore that on
* PPC only for now . . .
*/
if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type == MT_LCD
&& rinfo->is_mobility) {
int ppll_div_sel;
u32 ppll_divn;
ppll_div_sel = INREG8(CLOCK_CNTL_INDEX + 1 ) & 0 x3;
radeon_pll_errata_after_index(rinfo);
ppll_divn = INPLL(PPLL_DIV_0 + ppll_div_sel);
rinfo->panel_info.ref_divider = rinfo->pll.ref_div;
rinfo->panel_info.fbk_divider = ppll_divn & 0 x7ff;
rinfo->panel_info.post_divider = (ppll_divn >> 16 ) & 0 x7;
rinfo->panel_info.use_bios_dividers = 1 ;
printk(KERN_DEBUG "radeonfb: Using Firmware dividers 0x%08x "
"from PPLL %d\n" ,
rinfo->panel_info.fbk_divider |
(rinfo->panel_info.post_divider << 16 ),
ppll_div_sel);
}
#endif /* CONFIG_PPC */
}
/*
* Fill up panel infos from a mode definition , either returned by the EDID
* or from the default mode when we can ' t do any better
*/
static void radeon_var_to_panel_info(struct radeonfb_info *rinfo, struct fb_var_screeninfo *var)
{
rinfo->panel_info.xres = var->xres;
rinfo->panel_info.yres = var->yres;
rinfo->panel_info.clock = 100000000 / var->pixclock;
rinfo->panel_info.hOver_plus = var->right_margin;
rinfo->panel_info.hSync_width = var->hsync_len;
rinfo->panel_info.hblank = var->left_margin +
(var->right_margin + var->hsync_len);
rinfo->panel_info.vOver_plus = var->lower_margin;
rinfo->panel_info.vSync_width = var->vsync_len;
rinfo->panel_info.vblank = var->upper_margin +
(var->lower_margin + var->vsync_len);
rinfo->panel_info.hAct_high =
(var->sync & FB_SYNC_HOR_HIGH_ACT) != 0 ;
rinfo->panel_info.vAct_high =
(var->sync & FB_SYNC_VERT_HIGH_ACT) != 0 ;
rinfo->panel_info.valid = 1 ;
/* We use a default of 200ms for the panel power delay,
* I need to have a real schedule ( ) instead of mdelay ' s in the panel code .
* we might be possible to figure out a better power delay either from
* MacOS OF tree or from the EDID block ( proprietary extensions ? )
*/
rinfo->panel_info.pwr_delay = 200 ;
}
static void radeon_videomode_to_var(struct fb_var_screeninfo *var,
const struct fb_videomode *mode)
{
var->xres = mode->xres;
var->yres = mode->yres;
var->xres_virtual = mode->xres;
var->yres_virtual = mode->yres;
var->xoffset = 0 ;
var->yoffset = 0 ;
var->pixclock = mode->pixclock;
var->left_margin = mode->left_margin;
var->right_margin = mode->right_margin;
var->upper_margin = mode->upper_margin;
var->lower_margin = mode->lower_margin;
var->hsync_len = mode->hsync_len;
var->vsync_len = mode->vsync_len;
var->sync = mode->sync;
var->vmode = mode->vmode;
}
#ifdef CONFIG_PPC_PSERIES
static int is_powerblade(const char *model)
{
struct device_node *root;
const char * cp;
int len, l, rc = 0 ;
root = of_find_node_by_path("/" );
if (root && model) {
l = strlen(model);
cp = of_get_property(root, "model" , &len);
if (cp)
rc = memcmp(model, cp, min(len, l)) == 0 ;
of_node_put(root);
}
return rc;
}
#endif
/*
* Build the modedb for head 1 ( head 2 will come later ) , check panel infos
* from either BIOS or EDID , and pick up the default mode
*/
void radeon_check_modes(struct radeonfb_info *rinfo, const char *mode_option)
{
struct fb_info * info = rinfo->info;
int has_default_mode = 0 ;
/*
* Fill default var first
*/
info->var = radeonfb_default_var;
INIT_LIST_HEAD(&info->modelist);
/*
* First check out what BIOS has to say
*/
if (rinfo->mon1_type == MT_LCD)
radeon_get_panel_info_BIOS(rinfo);
/*
* Parse EDID detailed timings and deduce panel infos if any . Right now
* we only deal with first entry returned by parse_EDID , we may do better
* some day . . .
*/
if (!rinfo->panel_info.use_bios_dividers && rinfo->mon1_type != MT_CRT
&& rinfo->mon1_EDID) {
struct fb_var_screeninfo var;
pr_debug("Parsing EDID data for panel info\n" );
if (fb_parse_edid(rinfo->mon1_EDID, &var) == 0 ) {
if (var.xres >= rinfo->panel_info.xres &&
var.yres >= rinfo->panel_info.yres)
radeon_var_to_panel_info(rinfo, &var);
}
}
/*
* Do any additional platform / arch fixups to the panel infos
*/
radeon_fixup_panel_info(rinfo);
/*
* If we have some valid panel infos , we setup the default mode based on
* those
*/
if (rinfo->mon1_type != MT_CRT && rinfo->panel_info.valid) {
struct fb_var_screeninfo *var = &info->var;
pr_debug("Setting up default mode based on panel info\n" );
var->xres = rinfo->panel_info.xres;
var->yres = rinfo->panel_info.yres;
var->xres_virtual = rinfo->panel_info.xres;
var->yres_virtual = rinfo->panel_info.yres;
var->xoffset = var->yoffset = 0 ;
var->bits_per_pixel = 8 ;
var->pixclock = 100000000 / rinfo->panel_info.clock;
var->left_margin = (rinfo->panel_info.hblank - rinfo->panel_info.hOver_plus
- rinfo->panel_info.hSync_width);
var->right_margin = rinfo->panel_info.hOver_plus;
var->upper_margin = (rinfo->panel_info.vblank - rinfo->panel_info.vOver_plus
- rinfo->panel_info.vSync_width);
var->lower_margin = rinfo->panel_info.vOver_plus;
var->hsync_len = rinfo->panel_info.hSync_width;
var->vsync_len = rinfo->panel_info.vSync_width;
var->sync = 0 ;
if (rinfo->panel_info.hAct_high)
var->sync |= FB_SYNC_HOR_HIGH_ACT;
if (rinfo->panel_info.vAct_high)
var->sync |= FB_SYNC_VERT_HIGH_ACT;
var->vmode = 0 ;
has_default_mode = 1 ;
}
/*
* Now build modedb from EDID
*/
if (rinfo->mon1_EDID) {
fb_edid_to_monspecs(rinfo->mon1_EDID, &info->monspecs);
fb_videomode_to_modelist(info->monspecs.modedb,
info->monspecs.modedb_len,
&info->modelist);
rinfo->mon1_modedb = info->monspecs.modedb;
rinfo->mon1_dbsize = info->monspecs.modedb_len;
}
/*
* Finally , if we don ' t have panel infos we need to figure some ( or
* we try to read it from card ) , we try to pick a default mode
* and create some panel infos . Whatever . . .
*/
if (rinfo->mon1_type != MT_CRT && !rinfo->panel_info.valid) {
struct fb_videomode *modedb;
int dbsize;
char modename[32 ];
pr_debug("Guessing panel info...\n" );
if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0 ) {
u32 tmp = INREG(FP_HORZ_STRETCH) & HORZ_PANEL_SIZE;
rinfo->panel_info.xres = ((tmp >> HORZ_PANEL_SHIFT) + 1 ) * 8 ;
tmp = INREG(FP_VERT_STRETCH) & VERT_PANEL_SIZE;
rinfo->panel_info.yres = (tmp >> VERT_PANEL_SHIFT) + 1 ;
}
if (rinfo->panel_info.xres == 0 || rinfo->panel_info.yres == 0 ) {
printk(KERN_WARNING "radeonfb: Can't find panel size, going back to CRT\n" );
rinfo->mon1_type = MT_CRT;
goto pickup_default;
}
printk(KERN_WARNING "radeonfb: Assuming panel size %dx%d\n" ,
rinfo->panel_info.xres, rinfo->panel_info.yres);
modedb = rinfo->mon1_modedb;
dbsize = rinfo->mon1_dbsize;
snprintf(modename, 31 , "%dx%d" , rinfo->panel_info.xres, rinfo->panel_info.yres);
if (fb_find_mode(&info->var, info, modename,
modedb, dbsize, NULL, 8 ) == 0 ) {
printk(KERN_WARNING "radeonfb: Can't find mode for panel size, going back to CRT\n" );
rinfo->mon1_type = MT_CRT;
goto pickup_default;
}
has_default_mode = 1 ;
radeon_var_to_panel_info(rinfo, &info->var);
}
pickup_default:
/*
* Apply passed - in mode option if any
*/
if (mode_option) {
if (fb_find_mode(&info->var, info, mode_option,
info->monspecs.modedb,
info->monspecs.modedb_len, NULL, 8 ) != 0 )
has_default_mode = 1 ;
}
#ifdef CONFIG_PPC_PSERIES
if (!has_default_mode && (
is_powerblade("IBM,8842" ) || /* JS20 */
is_powerblade("IBM,8844" ) || /* JS21 */
is_powerblade("IBM,7998" ) || /* JS12/JS21/JS22 */
is_powerblade("IBM,0792" ) || /* QS21 */
is_powerblade("IBM,0793" ) /* QS22 */
)) {
printk("Falling back to 800x600 on JSxx hardware\n" );
if (fb_find_mode(&info->var, info, "800x600@60" ,
info->monspecs.modedb,
info->monspecs.modedb_len, NULL, 8 ) != 0 )
has_default_mode = 1 ;
}
#endif
/*
* Still no mode , let ' s pick up a default from the db
*/
if (!has_default_mode && info->monspecs.modedb != NULL) {
struct fb_monspecs *specs = &info->monspecs;
struct fb_videomode *modedb = NULL;
/* get preferred timing */
if (specs->misc & FB_MISC_1ST_DETAIL) {
int i;
for (i = 0 ; i < specs->modedb_len; i++) {
if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
modedb = &specs->modedb[i];
break ;
}
}
} else {
/* otherwise, get first mode in database */
modedb = &specs->modedb[0 ];
}
if (modedb != NULL) {
info->var.bits_per_pixel = 8 ;
radeon_videomode_to_var(&info->var, modedb);
has_default_mode = 1 ;
}
}
if (1 ) {
struct fb_videomode mode;
/* Make sure that whatever mode got selected is actually in the
* modelist or the kernel may die
*/
fb_var_to_videomode(&mode, &info->var);
fb_add_videomode(&mode, &info->modelist);
}
}
/*
* The code below is used to pick up a mode in check_var and
* set_var . It should be made generic
*/
/*
* This is used when looking for modes . We assign a " distance " value
* to a mode in the modedb depending how " close " it is from what we
* are looking for .
* Currently , we don ' t compare that much , we could do better but
* the current fbcon doesn ' t quite mind ; )
*/
static int radeon_compare_modes(const struct fb_var_screeninfo *var,
const struct fb_videomode *mode)
{
int distance = 0 ;
distance = mode->yres - var->yres;
distance += (mode->xres - var->xres)/2 ;
return distance;
}
/*
* This function is called by check_var , it gets the passed in mode parameter , and
* outputs a valid mode matching the passed - in one as closely as possible .
* We need something better ultimately . Things like fbcon basically pass us out
* current mode with xres / yres hacked , while things like XFree will actually
* produce a full timing that we should respect as much as possible .
*
* This is why I added the FB_ACTIVATE_FIND that is used by fbcon . Without this ,
* we do a simple spec match , that ' s all . With it , we actually look for a mode in
* either our monitor modedb or the vesa one if none
*
*/
int radeon_match_mode(struct radeonfb_info *rinfo,
struct fb_var_screeninfo *dest,
const struct fb_var_screeninfo *src)
{
const struct fb_videomode *db = vesa_modes;
int i, dbsize = 34 ;
int has_rmx, native_db = 0 ;
int distance = INT_MAX;
const struct fb_videomode *candidate = NULL;
/* Start with a copy of the requested mode */
memcpy(dest, src, sizeof (struct fb_var_screeninfo));
/* Check if we have a modedb built from EDID */
if (rinfo->mon1_modedb) {
db = rinfo->mon1_modedb;
dbsize = rinfo->mon1_dbsize;
native_db = 1 ;
}
/* Check if we have a scaler allowing any fancy mode */
has_rmx = rinfo->mon1_type == MT_LCD || rinfo->mon1_type == MT_DFP;
/* If we have a scaler and are passed FB_ACTIVATE_TEST or
* FB_ACTIVATE_NOW , just do basic checking and return if the
* mode match
*/
if ((src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST ||
(src->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
/* We don't have an RMX, validate timings. If we don't have
* monspecs , we should be paranoid and not let use go above
* 640 x480 - 60 , but I assume userland knows what it ' s doing here
* ( though I may be proven wrong . . . )
*/
if (has_rmx == 0 && rinfo->mon1_modedb)
if (fb_validate_mode((struct fb_var_screeninfo *)src, rinfo->info))
return -EINVAL;
return 0 ;
}
/* Now look for a mode in the database */
while (db) {
for (i = 0 ; i < dbsize; i++) {
int d;
if (db[i].yres < src->yres)
continue ;
if (db[i].xres < src->xres)
continue ;
d = radeon_compare_modes(src, &db[i]);
/* If the new mode is at least as good as the previous one,
* then it ' s our new candidate
*/
if (d < distance) {
candidate = &db[i];
distance = d;
}
}
db = NULL;
/* If we have a scaler, we allow any mode from the database */
if (native_db && has_rmx) {
db = vesa_modes;
dbsize = 34 ;
native_db = 0 ;
}
}
/* If we have found a match, return it */
if (candidate != NULL) {
radeon_videomode_to_var(dest, candidate);
return 0 ;
}
/* If we haven't and don't have a scaler, fail */
if (!has_rmx)
return -EINVAL;
return 0 ;
}
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