From 3888d4639e78802c4ec1086127124e890461b9e4 Mon Sep 17 00:00:00 2001 From: Jens Rottmann Date: Mon, 28 Apr 2008 02:15:22 -0700 Subject: [PATCH] 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. Signed-off-by: Jens Rottmann Cc: Jordan Crouse Cc: "Antonino A. Daplas" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/geode/lxfb_ops.c | 112 ++++++++++++++++++++++++--------- 1 file changed, 81 insertions(+), 31 deletions(-) diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c index a52c180062..afe8e33ac1 100644 --- a/drivers/video/geode/lxfb_ops.c +++ b/drivers/video/geode/lxfb_ops.c @@ -35,35 +35,85 @@ static const struct { unsigned int pllval; unsigned int freq; } pll_table[] = { - { 0x000031AC, 24923 }, - { 0x0000215D, 25175 }, - { 0x00001087, 27000 }, - { 0x0000216C, 28322 }, - { 0x0000218D, 28560 }, - { 0x000010C9, 31200 }, - { 0x00003147, 31500 }, - { 0x000010A7, 33032 }, - { 0x00002159, 35112 }, - { 0x00004249, 35500 }, - { 0x00000057, 36000 }, - { 0x0000219A, 37889 }, - { 0x00002158, 39168 }, - { 0x00000045, 40000 }, - { 0x00000089, 43163 }, - { 0x000010E7, 44900 }, - { 0x00002136, 45720 }, - { 0x00003207, 49500 }, - { 0x00002187, 50000 }, - { 0x00004286, 56250 }, - { 0x000010E5, 60065 }, - { 0x00004214, 65000 }, - { 0x00001105, 68179 }, - { 0x000031E4, 74250 }, - { 0x00003183, 75000 }, - { 0x00004284, 78750 }, - { 0x00001104, 81600 }, - { 0x00006363, 94500 }, - { 0x00005303, 97520 }, + { 0x000131AC, 6231 }, + { 0x0001215D, 6294 }, + { 0x00011087, 6750 }, + { 0x0001216C, 7081 }, + { 0x0001218D, 7140 }, + { 0x000110C9, 7800 }, + { 0x00013147, 7875 }, + { 0x000110A7, 8258 }, + { 0x00012159, 8778 }, + { 0x00014249, 8875 }, + { 0x00010057, 9000 }, + { 0x0001219A, 9472 }, + { 0x00012158, 9792 }, + { 0x00010045, 10000 }, + { 0x00010089, 10791 }, + { 0x000110E7, 11225 }, + { 0x00012136, 11430 }, + { 0x00013207, 12375 }, + { 0x00012187, 12500 }, + { 0x00014286, 14063 }, + { 0x000110E5, 15016 }, + { 0x00014214, 16250 }, + { 0x00011105, 17045 }, + { 0x000131E4, 18563 }, + { 0x00013183, 18750 }, + { 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 }, { 0x00002183, 100187 }, { 0x00002122, 101420 }, { 0x00001081, 108000 }, @@ -138,7 +188,7 @@ static void lx_set_clock(struct fb_info *info) unsigned int diff, min, best = 0; unsigned int freq, i; - freq = (unsigned int) (0x3b9aca00 / info->var.pixclock); + freq = (unsigned int) (1000000000 / info->var.pixclock); min = abs(pll_table[0].freq - freq); @@ -150,7 +200,7 @@ static void lx_set_clock(struct fb_info *info) } } - lx_set_dotpll(pll_table[best].pllval & 0x7FFF); + lx_set_dotpll(pll_table[best].pllval & 0x00017FFF); } static void lx_graphics_disable(struct fb_info *info) -- 2.39.5