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drm/radeon: fix handling for ddc type 5 on combios 

When ddc type is 5, need to look up the i2c channel
in the i2c table.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-07-19 20:11:44 -04:00
parent 9830605d4c
commit 3d61bd4213
1 changed files with 36 additions and 21 deletions
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51
drivers/gpu/drm/radeon/radeon_combios.c
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@ -719,6 +719,34 @@ static struct radeon_i2c_bus_rec combios_setup_i2c_bus(struct radeon_device *rde
return i2c;
}
static struct radeon_i2c_bus_rec radeon_combios_get_i2c_info_from_table(struct radeon_device *rdev)
{
struct drm_device *dev = rdev->ddev;
struct radeon_i2c_bus_rec i2c;
u16 offset;
u8 id, blocks, clk, data;
int i;
i2c.valid = false;
offset = combios_get_table_offset(dev, COMBIOS_I2C_INFO_TABLE);
if (offset) {
blocks = RBIOS8(offset + 2);
for (i = 0; i < blocks; i++) {
id = RBIOS8(offset + 3 + (i * 5) + 0);
if (id == 136) {
clk = RBIOS8(offset + 3 + (i * 5) + 3);
data = RBIOS8(offset + 3 + (i * 5) + 4);
/* gpiopad */
i2c = combios_setup_i2c_bus(rdev, DDC_MONID,
(1 << clk), (1 << data));
break;
}
}
}
return i2c;
}
void radeon_combios_i2c_init(struct radeon_device *rdev)
{
struct drm_device *dev = rdev->ddev;
@ -755,30 +783,14 @@ void radeon_combios_i2c_init(struct radeon_device *rdev)
} else if (rdev->family == CHIP_RS300 ||
rdev->family == CHIP_RS400 ||
rdev->family == CHIP_RS480) {
u16 offset;
u8 id, blocks, clk, data;
int i;
/* 0x68 */
i2c = combios_setup_i2c_bus(rdev, DDC_CRT2, 0, 0);
rdev->i2c_bus[3] = radeon_i2c_create(dev, &i2c, "MONID");
offset = combios_get_table_offset(dev, COMBIOS_I2C_INFO_TABLE);
if (offset) {
blocks = RBIOS8(offset + 2);
for (i = 0; i < blocks; i++) {
id = RBIOS8(offset + 3 + (i * 5) + 0);
if (id == 136) {
clk = RBIOS8(offset + 3 + (i * 5) + 3);
data = RBIOS8(offset + 3 + (i * 5) + 4);
/* gpiopad */
i2c = combios_setup_i2c_bus(rdev, DDC_MONID,
(1 << clk), (1 << data));
i2c = radeon_combios_get_i2c_info_from_table(rdev);
if (i2c.valid)
rdev->i2c_bus[4] = radeon_i2c_create(dev, &i2c, "GPIOPAD_MASK");
break;
}
}
}
} else if ((rdev->family == CHIP_R200) ||
(rdev->family >= CHIP_R300)) {
/* 0x68 */
@ -2321,6 +2333,9 @@ bool radeon_get_legacy_connector_info_from_bios(struct drm_device *dev)
connector = (tmp >> 12) & 0xf;
ddc_type = (tmp >> 8) & 0xf;
if (ddc_type == 5)
ddc_i2c = radeon_combios_get_i2c_info_from_table(rdev);
else
ddc_i2c = combios_setup_i2c_bus(rdev, ddc_type, 0, 0);
switch (connector) {