diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2010-11-30 00:15:10 -0500 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-12-14 23:40:11 +0100 |
| commit | 7b86e65e74572b8a2935e136a901a527786d2772 (patch) | |
| tree | bc4099df6d9eeb163b3fe8641aaa3d78411cf981 | |
| parent | 2aa9f3ac2b1027717eb57010b5931d1d85b216fb (diff) | |
drm/radeon/kms: add workaround for dce3 ddc line vbios bug
commit 3074adc8b6d9bf28b574a58241b958057a69a7a0 upstream.
fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=23752
[AK: Dropped hunk for non existing i2c code in .35]
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atombios.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index d7c18e5233e..42d876a5751 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -84,6 +84,14 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev for (i = 0; i < num_indices; i++) { gpio = &i2c_info->asGPIO_Info[i]; + /* some DCE3 boards have bad data for this entry */ + if (ASIC_IS_DCE3(rdev)) { + if ((i == 4) && + (gpio->usClkMaskRegisterIndex == 0x1fda) && + (gpio->sucI2cId.ucAccess == 0x94)) + gpio->sucI2cId.ucAccess = 0x14; + } + if (gpio->sucI2cId.ucAccess == id) { i2c.mask_clk_reg = le16_to_cpu(gpio->usClkMaskRegisterIndex) * 4; i2c.mask_data_reg = le16_to_cpu(gpio->usDataMaskRegisterIndex) * 4; |