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Commit 82f55af0 authored by Jens Rottmann's avatar Jens Rottmann Committed by Linus Torvalds
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fix "lxfb: extend PLL table to support dotclocks below 25 MHz" 



The following patch caused a regression with OLPC panels:

 commit 3888d463
    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: default avatarAndres Salomon <dilinger@debian.org>
Signed-off-by: default avatarJens Rottmann <JRottmann@LiPPERT-AT.de>
Tested-by: default avatarAndres Salomon <dilinger@debian.org>
Acked-by: default avatarJordan Crouse <jordan.crouse@amd.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8b8b4988

drivers/video/geode/lxfb_ops.c

+0 −22
Original line number Diff line number Diff line
@@ -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 },

  { 0x000010A7,  33032 },

  { 0x00012182,  33375 },

  { 0x000141B1,  33750 },

  { 0x00002159,  35112 },

  { 0x00004249,  35500 },

  { 0x00000057,  36000 },

  { 0x000141E1,  37125 },

  { 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 },