https://github.com/torvalds/linux
Revision ce495960ff33f96362cf81f0eb7c52d1a89f64be authored by Julia Lemire on 07 March 2013, 15:41:03 UTC, committed by Dave Airlie on 07 March 2013, 22:31:49 UTC
Renesas boards were consistently defaulting to the 1024x768 resolution,
regardless of the native resolution of the monitor plugged in.  It was
determined that the EDID of the monitor was not being read.  Since the
DAC is a shared line, in order to read from or write to it we must take
control of the DAC clock.  This can be done by setting the proper
register to one.

This bug fix sets the register MGA1064_GEN_IO_CTL2 to one.  The DAC
control line can be used to determine whether or not a new monitor has
been plugged in.  But since the hotplug feature is not one we will
support, it has been decided to simply leave the register set to one.

Signed-off-by: Julia Lemire <jlemire@matrox.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
1 parent 0ba5317
History
Tip revision: ce495960ff33f96362cf81f0eb7c52d1a89f64be authored by Julia Lemire on 07 March 2013, 15:41:03 UTC
drm/mgag200: Bug fix: Renesas board now selects native resolution.
Tip revision: ce49596
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