From: 黄涛 Date: Fri, 29 Jul 2011 08:22:28 +0000 (+0800) Subject: rk29: clock: default codec pll rate set to 297MHz X-Git-Tag: firefly_0821_release~10053^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=605d984dce13030a6c2f7c7e0a0e669ef6bf00e9;p=firefly-linux-kernel-4.4.55.git rk29: clock: default codec pll rate set to 297MHz --- diff --git a/arch/arm/mach-rk29/clock.c b/arch/arm/mach-rk29/clock.c index 2a8838a3f459..6f78ea504875 100755 --- a/arch/arm/mach-rk29/clock.c +++ b/arch/arm/mach-rk29/clock.c @@ -135,13 +135,17 @@ static int clksel_set_rate_div(struct clk *clk, unsigned long rate) return -ENOENT; } -static long clksel_round_rate_div(struct clk *clk, unsigned long rate) +static long clksel_round_rate_div_by_parent(struct clk *clk, unsigned long rate, struct clk *parent, unsigned long max_rate) { u32 div; unsigned long prev = ULONG_MAX, actual; + if (max_rate < rate) + max_rate = rate; for (div = 0; div <= clk->clksel_mask; div++) { - actual = clk->parent->rate / (div + 1); + actual = parent->rate / (div + 1); + if (actual > max_rate) + continue; if (actual > rate) prev = actual; if (actual && actual <= rate) { @@ -154,11 +158,18 @@ static long clksel_round_rate_div(struct clk *clk, unsigned long rate) } if (div > clk->clksel_mask) div = clk->clksel_mask; - pr_debug("clock %s, target rate %ld, rounded rate %ld (div %d)\n", clk->name, rate, actual, div + 1); + pr_debug("clock %s, target rate %ld, max rate %ld, rounded rate %ld (div %d)\n", clk->name, rate, max_rate, actual, div + 1); return actual; } +#if 0 +static long clksel_round_rate_div(struct clk *clk, unsigned long rate) +{ + return clksel_round_rate_div_by_parent(clk, rate, clk->parent, ULONG_MAX); +} +#endif + static int clksel_set_rate_shift(struct clk *clk, unsigned long rate) { u32 shift; @@ -589,9 +600,11 @@ static const struct codec_pll_set codec_pll[] = { // rate parent band NR NF NO CODEC_PLL(108000, 24, LOW, 1, 18, 4), // for TV CODEC_PLL(648000, 24, HIGH, 1, 27, 1), - CODEC_PLL(297000, 27, LOW, 1, 22, 2), // for HDMI + CODEC_PLL(148500, 27, LOW, 1, 22, 4), // for HDMI + CODEC_PLL(297000, 27, LOW, 1, 22, 2), CODEC_PLL(445500, 27, LOW, 2, 33, 1), CODEC_PLL(594000, 27, HIGH, 1, 22, 1), + CODEC_PLL(891000, 27, HIGH, 1, 33, 1), CODEC_PLL(300000, 24, LOW, 1, 25, 2), // for GPU CODEC_PLL(360000, 24, LOW, 1, 15, 1), CODEC_PLL(408000, 24, LOW, 1, 17, 1), @@ -1708,12 +1721,31 @@ static struct clk hclk_vdpu = { static int clk_gpu_set_rate(struct clk *clk, unsigned long rate) { - if (clk->parent == &codec_pll_clk && rate != codec_pll_clk.rate && rate == general_pll_clk.rate) { - clk_set_parent_nolock(clk, &general_pll_clk); - } else if (clk->parent == &general_pll_clk && rate != general_pll_clk.rate) { - clk_set_parent_nolock(clk, &codec_pll_clk); + unsigned long max_rate = rate / 100 * 105; /* +5% */ + struct clk *parents[] = { &general_pll_clk, &codec_pll_clk, &ddr_pll_clk }; + int i; + unsigned long best_rate = 0; + struct clk *best_parent = clk->parent; + + for (i = 0; i < ARRAY_SIZE(parents); i++) { + unsigned long new_rate = clksel_round_rate_div_by_parent(clk, rate, parents[i], max_rate); + if (new_rate == rate) { + best_rate = new_rate; + best_parent = parents[i]; + break; + } + if (new_rate > max_rate) + continue; + if (new_rate > best_rate) { + best_rate = new_rate; + best_parent = parents[i]; + } } - return clksel_set_rate_div(clk, clksel_round_rate_div(clk, rate)); + if (!best_rate) + return -ENOENT; + if (best_parent != clk->parent) + clk_set_parent_nolock(clk, best_parent); + return clksel_set_rate_div(clk, best_rate); } static struct clk clk_gpu = { @@ -2645,14 +2677,14 @@ void __init rk29_clock_init2(enum periph_pll ppll_rate, enum codec_pll cpll_rate printk(KERN_INFO "Clocking rate (apll/dpll/cpll/gpll/core/aclk_cpu/hclk_cpu/pclk_cpu/aclk_periph/hclk_periph/pclk_periph): %ld/%ld/%ld/%ld/%ld/%ld/%ld/%ld/%ld/%ld/%ld MHz", arm_pll_clk.rate / MHZ, ddr_pll_clk.rate / MHZ, codec_pll_clk.rate / MHZ, general_pll_clk.rate / MHZ, clk_core.rate / MHZ, aclk_cpu.rate / MHZ, hclk_cpu.rate / MHZ, pclk_cpu.rate / MHZ, aclk_periph.rate / MHZ, hclk_periph.rate / MHZ, pclk_periph.rate / MHZ); - printk(KERN_CONT " (20110725)\n"); + printk(KERN_CONT " (20110729)\n"); preset_lpj = loops_per_jiffy; } void __init rk29_clock_init(enum periph_pll ppll_rate) { - rk29_clock_init2(ppll_rate, codec_pll_445mhz, true); + rk29_clock_init2(ppll_rate, codec_pll_297mhz, true); } #ifdef CONFIG_PROC_FS diff --git a/arch/arm/mach-rk29/include/mach/board.h b/arch/arm/mach-rk29/include/mach/board.h index 2e3dcfdc6230..2ec4d4c853a5 100755 --- a/arch/arm/mach-rk29/include/mach/board.h +++ b/arch/arm/mach-rk29/include/mach/board.h @@ -329,14 +329,13 @@ enum periph_pll { enum codec_pll { codec_pll_297mhz = 297000000, /* for HDMI */ codec_pll_300mhz = 300000000, - codec_pll_445mhz = 445500000, /* for HDMI */ codec_pll_504mhz = 504000000, codec_pll_552mhz = 552000000, codec_pll_594mhz = 594000000, /* for HDMI */ codec_pll_600mhz = 600000000, }; -void __init rk29_clock_init(enum periph_pll ppll_rate); /* codec pll is 445.5MHz, has xin27m */ +void __init rk29_clock_init(enum periph_pll ppll_rate); /* codec pll is 297MHz, has xin27m */ void __init rk29_clock_init2(enum periph_pll ppll_rate, enum codec_pll cpll_rate, bool has_xin27m); /* for USB detection */