* document GPIO values better based on AMD docs
* no functional change git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42730 a95241bf-73f2-0310-859d-f6bbb57e9c96
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@ -387,6 +387,8 @@ radeon_gpu_i2c_setup(uint32 connector, uint8 gpio_id)
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gConnector[connector]->connector_ddc_info.valid = true;
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gConnector[connector]->connector_ddc_info.gpio_id = gpio_id;
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// GPIO mask (Allows software to control the GPIO pad)
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// 0 = chip access; 1 = only software;
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gConnector[connector]->connector_ddc_info.mask_scl_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usClkMaskRegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.mask_sda_reg
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@ -396,6 +398,8 @@ radeon_gpu_i2c_setup(uint32 connector, uint8 gpio_id)
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gConnector[connector]->connector_ddc_info.mask_sda_shift
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= (1 << gpio->ucDataMaskShift);
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// GPIO output / write (A) enable
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// 0 = GPIO input (Y); 1 = GPIO output (A);
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gConnector[connector]->connector_ddc_info.gpio_en_scl_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usClkEnRegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_en_sda_reg
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@ -405,6 +409,17 @@ radeon_gpu_i2c_setup(uint32 connector, uint8 gpio_id)
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gConnector[connector]->connector_ddc_info.gpio_en_sda_shift
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= (1 << gpio->ucDataEnShift);
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// GPIO output / write (A)
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gConnector[connector]->connector_ddc_info.gpio_a_scl_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usClkA_RegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_a_sda_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usDataA_RegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_a_scl_shift
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= (1 << gpio->ucClkA_Shift);
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gConnector[connector]->connector_ddc_info.gpio_a_sda_shift
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= (1 << gpio->ucDataA_Shift);
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// GPIO input / read (Y)
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gConnector[connector]->connector_ddc_info.gpio_y_scl_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usClkY_RegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_y_sda_reg
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@ -414,14 +429,6 @@ radeon_gpu_i2c_setup(uint32 connector, uint8 gpio_id)
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gConnector[connector]->connector_ddc_info.gpio_y_sda_shift
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= (1 << gpio->ucDataY_Shift);
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gConnector[connector]->connector_ddc_info.gpio_a_scl_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usClkA_RegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_a_sda_reg
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= B_LENDIAN_TO_HOST_INT16(gpio->usDataA_RegisterIndex) * 4;
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gConnector[connector]->connector_ddc_info.gpio_a_scl_shift
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= (1 << gpio->ucClkA_Shift);
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gConnector[connector]->connector_ddc_info.gpio_a_sda_shift
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= (1 << gpio->ucDataA_Shift);
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}
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return B_OK;
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