Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [131/223] drm/radeon/kms: add workaround for dce3 ddc line vbios bug | Date | Mon, 13 Dec 2010 00:47:13 +0100 (CET) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Alex Deucher <alexdeucher@gmail.com>
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>
--- drivers/gpu/drm/radeon/radeon_atombios.c | 8 ++++++++ 1 file changed, 8 insertions(+)
Index: linux/drivers/gpu/drm/radeon/radeon_atombios.c =================================================================== --- linux.orig/drivers/gpu/drm/radeon/radeon_atombios.c +++ linux/drivers/gpu/drm/radeon/radeon_atombios.c @@ -84,6 +84,14 @@ static inline struct radeon_i2c_bus_rec 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;
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