Comment 94 for bug 256142
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#94 |
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0e1f616
(Get the code!)
Bandwidth calculations may not be needed. Since the underrun seems to happen only with FBC, and since FBC is only enabled when only plane A is on, a solution would be: when enabling FBC, set DSPARB to 95/95; when disabling FBC, set DSPARB back to the default value 28/59.
Moreover, the FBC could perhaps be disabled for very high resolutions. (But is the chip fast enough to drive them?) At least in my case, 64/95 is fine for 1600x1200x4 at 60Hz. So I guess 1920x1200 should be fine with 95/95.