From af7c708ed5d286372ea57e3685f8a354ef9f57bc Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 30 Nov 2010 00:15:10 -0500 Subject: [PATCH] drm/radeon/kms: add workaround for dce3 ddc line vbios bug commit 3074adc8b6d9bf28b574a58241b958057a69a7a0 upstream. fixes: https://bugzilla.kernel.org/show_bug.cgi?id=23752 Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_atombios.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 8e43ddae70c..3779265c3b9 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -98,6 +98,14 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev } } + /* 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; @@ -174,6 +182,14 @@ void radeon_atombios_i2c_init(struct radeon_device *rdev) } } + /* 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; + } + i2c.mask_clk_reg = le16_to_cpu(gpio->usClkMaskRegisterIndex) * 4; i2c.mask_data_reg = le16_to_cpu(gpio->usDataMaskRegisterIndex) * 4; i2c.en_clk_reg = le16_to_cpu(gpio->usClkEnRegisterIndex) * 4; -- 2.39.2