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viafb: fix IGA1 modesetting on VX900
Even if the documentation calls this bit "Reserved" it has to be set to 0 for correct modesetting on IGA1. Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: stable@vger.kernel.org
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@ -1810,6 +1810,9 @@ static void hw_init(void)
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break;
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}
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/* magic required on VX900 for correct modesetting on IGA1 */
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via_write_reg_mask(VIACR, 0x45, 0x00, 0x01);
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/* probably this should go to the scaling code one day */
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via_write_reg_mask(VIACR, 0xFD, 0, 0x80); /* VX900 hw scale on IGA2 */
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viafb_write_regx(scaling_parameters, ARRAY_SIZE(scaling_parameters));
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