diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2011-11-14 14:32:01 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-11-15 19:43:39 +0000 |
| commit | 6c47e5c23aa2a7c54ad7ac13af4bd56cd9e703bf (patch) | |
| tree | 402aa8b11f3ec82492212498452c63e517cf5e61 | |
| parent | b872a37437e93df9d112ce674752b3b3a0a17020 (diff) | |
| download | linux-6c47e5c23aa2a7c54ad7ac13af4bd56cd9e703bf.tar.bz2 | |
drm/radeon/kms: fix up gpio i2c mask bits for r4xx
Fixes i2c test failures when i2c_algo_bit.bit_test=1.
The hw doesn't actually require a mask, so just set it
to the default mask bits for r1xx-r4xx radeon ddc.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atombios.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index d2d179267af3..0a4ec1ed02c0 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -85,6 +85,18 @@ static struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_device *rd for (i = 0; i < num_indices; i++) { gpio = &i2c_info->asGPIO_Info[i]; + /* r4xx mask is technically not used by the hw, so patch in the legacy mask bits */ + if ((rdev->family == CHIP_R420) || + (rdev->family == CHIP_R423) || + (rdev->family == CHIP_RV410)) { + if ((le16_to_cpu(gpio->usClkMaskRegisterIndex) == 0x0018) || + (le16_to_cpu(gpio->usClkMaskRegisterIndex) == 0x0019) || + (le16_to_cpu(gpio->usClkMaskRegisterIndex) == 0x001a)) { + gpio->ucClkMaskShift = 0x19; + gpio->ucDataMaskShift = 0x18; + } + } + /* some evergreen boards have bad data for this entry */ if (ASIC_IS_DCE4(rdev)) { if ((i == 7) && |