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fix "lxfb: extend PLL table to support dotclocks below 25 MHz"

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The following patch caused a regression with OLPC panels:

 commit 3888d4639e
    lxfb: extend PLL table to support dotclocks below 25 MHz

    Extends the PLL frequency table of the AMD Geode-LX frame buffer driver to
    make use of the DIV4 bit, thus adding support for dotclocks between 6 and 25
    MHz.  These are needed for small LCDs (e.g.  320x240).  Also inserts some
    intermediate steps between pre-existing frequencies.

The problem was the insertion of intermediate steps into the frequency
table; they would cause the wrong frequency to be matched.  This patch
drops those intermediate frequencies while keeping the sub-25MHz
frequencies.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Jens Rottmann <JRottmann@LiPPERT-AT.de>
Tested-by: Andres Salomon <dilinger@debian.org>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jens Rottmann 2008-05-14 16:05:32 -07:00 committed by Linus Torvalds
parent 8b8b498836
commit 82f55af06a
1 changed files with 0 additions and 22 deletions
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22
drivers/video/geode/lxfb_ops.c
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@ -63,54 +63,32 @@ static const struct {
{ 0x00014284, 19688 },
{ 0x00011104, 20400 },
{ 0x00016363, 23625 },
{ 0x00015303, 24380 },
{ 0x000031AC, 24923 },
{ 0x0000215D, 25175 },
{ 0x00001087, 27000 },
{ 0x0000216C, 28322 },
{ 0x0000218D, 28560 },
{ 0x00010041, 29913 },
{ 0x000010C9, 31200 },
{ 0x00003147, 31500 },
{ 0x000141A1, 32400 },
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{ 0x00012182, 33375 },
{ 0x000141B1, 33750 },
{ 0x00002159, 35112 },
{ 0x00004249, 35500 },
{ 0x00000057, 36000 },
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{ 0x0000219A, 37889 },
{ 0x00002158, 39168 },
{ 0x00000045, 40000 },
{ 0x000131A1, 40500 },
{ 0x00010061, 42301 },
{ 0x00000089, 43163 },
{ 0x00012151, 43875 },
{ 0x000010E7, 44900 },
{ 0x00002136, 45720 },
{ 0x000152E1, 47250 },
{ 0x00010071, 48000 },
{ 0x00003207, 49500 },
{ 0x00002187, 50000 },
{ 0x00014291, 50625 },
{ 0x00011101, 51188 },
{ 0x00017481, 54563 },
{ 0x00004286, 56250 },
{ 0x00014170, 57375 },
{ 0x00016210, 58500 },
{ 0x000010E5, 60065 },
{ 0x00013140, 62796 },
{ 0x00004214, 65000 },
{ 0x00016250, 65250 },
{ 0x00001105, 68179 },
{ 0x000141C0, 69600 },
{ 0x00015220, 70160 },
{ 0x00010050, 72000 },
{ 0x000031E4, 74250 },
{ 0x00003183, 75000 },
{ 0x00004284, 78750 },
{ 0x00012130, 80052 },
{ 0x00001104, 81600 },
{ 0x00006363, 94500 },
{ 0x00005303, 97520 },