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ati-vga: make i2c register and bits configurable 

Prepare to support other ati cards.  Also log access mode and whenever
we got a valid edid block.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2019-06-24 12:08:32 +02:00
parent 136e2612bd
commit ae9a9796ec
1 changed files with 27 additions and 7 deletions
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34
vgasrc/atiext.c
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@ -43,6 +43,11 @@
#define CRT_CRTC_ON 0x00008000
static u32 ati_io_addr VAR16 = 0;
static u32 ati_i2c_reg VAR16;
static u32 ati_i2c_bit_scl_out VAR16;
static u32 ati_i2c_bit_sda_out VAR16;
static u32 ati_i2c_bit_sda_in VAR16;
int
is_ati_mode(struct vgamode_s *vmode_g)
@ -206,18 +211,18 @@ ati_i2c_set_scl_sda(int scl, int sda)
u32 data = 0;
if (!scl)
data |= (1 << 17);
data |= (1 << GET_GLOBAL(ati_i2c_bit_scl_out));
if (!sda)
data |= (1 << 16);
ati_write(GPIO_DVI_DDC, data);
data |= (1 << GET_GLOBAL(ati_i2c_bit_sda_out));
ati_write(GET_GLOBAL(ati_i2c_reg), data);
}
static int
ati_i2c_get_sda(void)
{
u32 data = ati_read(GPIO_DVI_DDC);
u32 data = ati_read(GET_GLOBAL(ati_i2c_reg));
return data & (1 << 8) ? 1 : 0;
return data & (1 << GET_GLOBAL(ati_i2c_bit_sda_in)) ? 1 : 0;
}
static void ati_i2c_start(void)
@ -275,7 +280,6 @@ static void ati_i2c_edid(void)
u8 byte;
int i;
dprintf(1, "ati: reading edid blob\n");
ati_i2c_start();
ati_i2c_send_byte(0x50 << 1 | 1);
ati_i2c_ack();
@ -287,6 +291,22 @@ static void ati_i2c_edid(void)
ati_i2c_stop();
}
static void ati_i2c_edid_radeon(void)
{
int valid;
SET_VGA(ati_i2c_bit_scl_out, 17);
SET_VGA(ati_i2c_bit_sda_out, 16);
SET_VGA(ati_i2c_bit_sda_in, 8);
dprintf(1, "ati: reading edid blob (radeon dvi) ... \n");
SET_VGA(ati_i2c_reg, GPIO_DVI_DDC);
ati_i2c_edid();
valid = (GET_GLOBAL(VBE_edid[0]) == 0x00 &&
GET_GLOBAL(VBE_edid[1]) == 0xff);
dprintf(1, "ati: ... %s\n", valid ? "good" : "invalid");
}
/****************************************************************
* init
****************************************************************/
@ -351,7 +371,7 @@ ati_setup(void)
u16 device = pci_config_readw(bdf, PCI_DEVICE_ID);
switch (device) {
case 0x5159:
ati_i2c_edid();
ati_i2c_edid_radeon();
break;
}