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| author | Alex Deucher <alexander.deucher@amd.com> | 2011-11-21 12:10:14 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-11-22 20:09:08 +0000 |
| commit | d724502a9d7a46f4a56a1663b1f50d2dc9d1ef40 (patch) | |
| tree | 399935f90134c38f90157896d9fa3d0495d49b0b /drivers | |
| parent | 26cc40a83384178bfaefbcfb4786591498f3e190 (diff) | |
| download | linux-d724502a9d7a46f4a56a1663b1f50d2dc9d1ef40.tar.gz linux-d724502a9d7a46f4a56a1663b1f50d2dc9d1ef40.tar.bz2 linux-d724502a9d7a46f4a56a1663b1f50d2dc9d1ef40.zip | |
drm/radeon/kms: fix up gpio i2c mask bits for r4xx for real
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.
I missed this part the first time through.
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>
Diffstat (limited to 'drivers')
| -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 fecd705a1a5f..933a2cd7bb55 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -181,6 +181,18 @@ void radeon_atombios_i2c_init(struct radeon_device *rdev) gpio = &i2c_info->asGPIO_Info[i]; i2c.valid = false; + /* 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) && |