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Commit 6c47e5c2 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent b872a374

drivers/gpu/drm/radeon/radeon_atombios.c

+12 −0
Original line number Diff line number Diff line
@@ -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) &&