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viafb: fix IGA1 modesetting on VX900

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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
This commit is contained in:
Florian Tobias Schandinat 2012-02-22 18:53:08 +00:00
parent 050f0e02c8
commit e29206381a
1 changed files with 3 additions and 0 deletions
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3
drivers/video/via/hw.c
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@ -1810,6 +1810,9 @@ static void hw_init(void)
break;
}
/* magic required on VX900 for correct modesetting on IGA1 */
via_write_reg_mask(VIACR, 0x45, 0x00, 0x01);
/* probably this should go to the scaling code one day */
via_write_reg_mask(VIACR, 0xFD, 0, 0x80); /* VX900 hw scale on IGA2 */
viafb_write_regx(scaling_parameters, ARRAY_SIZE(scaling_parameters));