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authorAlex Deucher <alexander.deucher@amd.com>2011-11-14 14:32:01 -0500
committerDave Airlie <airlied@redhat.com>2011-11-15 19:43:39 +0000
commit6c47e5c23aa2a7c54ad7ac13af4bd56cd9e703bf (patch)
tree402aa8b11f3ec82492212498452c63e517cf5e61 /drivers/gpu
parentb872a37437e93df9d112ce674752b3b3a0a17020 (diff)
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>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_atombios.c12
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 d2d179267af..0a4ec1ed02c 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) &&