Attachment 38229 Details for Bug 29255 – fix ddc line for VGA

[patch] fix ddc line for VGA

0001-drm-radeon-kms-evergreen-work-around-bad-data-in-som.patch (text/plain), 2.31 KB, created by Alex Deucher on 2010-08-27 13:06:11 UTC

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Creator: Alex Deucher

Created: 2010-08-27 13:06:11 UTC

Size: 2.31 KB

patch

obsolete

>From ec93ada81e4a8f69f742a1ce5b3760e384b1d7b3 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexdeucher@gmail.com>
>Date: Fri, 27 Aug 2010 15:56:56 -0400
>Subject: [PATCH] drm/radeon/kms/evergreen: work around bad data in some i2c tables
>
>The 7th entry in a lot of evergreen i2c gpio tables is partially
>zeroed.  Fix the entry.
>
>Should fix the missing ddc entry in:
>https://bugs.freedesktop.org/show_bug.cgi?id=29255
>
>Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
>---
> drivers/gpu/drm/radeon/radeon_atombios.c |   27 +++++++++++++++++++++++++++
> 1 files changed, 27 insertions(+), 0 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
>index 6114198..ebae14c 100644
>--- a/drivers/gpu/drm/radeon/radeon_atombios.c
>+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
>@@ -85,6 +85,19 @@ 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 evergreen boards have bad data for this entry */
>+			if (ASIC_IS_DCE4(rdev)) {
>+				if ((i == 7) &&
>+				    (gpio->usClkMaskRegisterIndex == 0x1936) &&
>+				    (gpio->sucI2cId.ucAccess == 0)) {
>+					gpio->sucI2cId.ucAccess = 0x97;
>+					gpio->ucDataMaskShift = 8;
>+					gpio->ucDataEnShift = 8;
>+					gpio->ucDataY_Shift = 8;
>+					gpio->ucDataA_Shift = 8;
>+				}
>+			}
>+
> 			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;
>@@ -147,6 +160,20 @@ void radeon_atombios_i2c_init(struct radeon_device *rdev)
> 		for (i = 0; i < num_indices; i++) {
> 			gpio = &i2c_info->asGPIO_Info[i];
> 			i2c.valid = false;
>+
>+			/* some evergreen boards have bad data for this entry */
>+			if (ASIC_IS_DCE4(rdev)) {
>+				if ((i == 7) &&
>+				    (gpio->usClkMaskRegisterIndex == 0x1936) &&
>+				    (gpio->sucI2cId.ucAccess == 0)) {
>+					gpio->sucI2cId.ucAccess = 0x97;
>+					gpio->ucDataMaskShift = 8;
>+					gpio->ucDataEnShift = 8;
>+					gpio->ucDataY_Shift = 8;
>+					gpio->ucDataA_Shift = 8;
>+				}
>+			}
>+
> 			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;
>-- 
>1.7.1.1
>

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