diff options
| author | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-03-10 22:39:22 +0000 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-03-12 10:22:00 +0000 |
| commit | 97597a39778eefb628eb7734a18f32c7880ad0e0 (patch) | |
| tree | f57989f5f90c9b28035ec41bf5769176d0b95475 /drivers/video/via/hw.c | |
| parent | f5b1c4b3b6d407ec5a9d93ca12738c4c7911000c (diff) | |
| download | kernel_samsung_crespo-97597a39778eefb628eb7734a18f32c7880ad0e0.zip kernel_samsung_crespo-97597a39778eefb628eb7734a18f32c7880ad0e0.tar.gz kernel_samsung_crespo-97597a39778eefb628eb7734a18f32c7880ad0e0.tar.bz2 | |
viafb: always return the best possible clock
Before this patch only clocks that perfectly match were used and if
none existed this was not handled properly. This patch changes this
to always use the closest clock supported. This should behave like
before for clocks that have a perfect match but be much saner for
clocks which are slightly off.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/via/hw.c')
| -rw-r--r-- | drivers/video/via/hw.c | 60 |
1 files changed, 28 insertions, 32 deletions
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c index 8c1393e..a7a5614 100644 --- a/drivers/video/via/hw.c +++ b/drivers/video/via/hw.c @@ -1677,40 +1677,36 @@ static u32 vx855_encode_pll(struct pll_config pll) u32 viafb_get_clk_value(int clk) { u32 value = 0; - int i = 0; + int i, best = 0; - while (i < NUM_TOTAL_PLL_TABLE && clk != pll_value[i].clk) - i++; - - if (i == NUM_TOTAL_PLL_TABLE) { - printk(KERN_WARNING "viafb_get_clk_value: PLL lookup failed!"); - } else { - switch (viaparinfo->chip_info->gfx_chip_name) { - case UNICHROME_CLE266: - case UNICHROME_K400: - value = cle266_encode_pll(pll_value[i].cle266_pll); - break; - - case UNICHROME_K800: - case UNICHROME_PM800: - case UNICHROME_CN700: - value = k800_encode_pll(pll_value[i].k800_pll); - break; - - case UNICHROME_CX700: - case UNICHROME_CN750: - case UNICHROME_K8M890: - case UNICHROME_P4M890: - case UNICHROME_P4M900: - case UNICHROME_VX800: - value = k800_encode_pll(pll_value[i].cx700_pll); - break; + for (i = 1; i < ARRAY_SIZE(pll_value); i++) { + if (abs(pll_value[i].clk - clk) + < abs(pll_value[best].clk - clk)) + best = i; + } - case UNICHROME_VX855: - case UNICHROME_VX900: - value = vx855_encode_pll(pll_value[i].vx855_pll); - break; - } + switch (viaparinfo->chip_info->gfx_chip_name) { + case UNICHROME_CLE266: + case UNICHROME_K400: + value = cle266_encode_pll(pll_value[best].cle266_pll); + break; + case UNICHROME_K800: + case UNICHROME_PM800: + case UNICHROME_CN700: + value = k800_encode_pll(pll_value[best].k800_pll); + break; + case UNICHROME_CX700: + case UNICHROME_CN750: + case UNICHROME_K8M890: + case UNICHROME_P4M890: + case UNICHROME_P4M900: + case UNICHROME_VX800: + value = k800_encode_pll(pll_value[best].cx700_pll); + break; + case UNICHROME_VX855: + case UNICHROME_VX900: + value = vx855_encode_pll(pll_value[best].vx855_pll); + break; } return value; |