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gpu: nvgpu: Combine delays with GK20A parameters

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Specified locking timeout and IDDQ exit delay as GK20A PLL parameters,
and used this data instead of hard-coded numbers.

Change-Id: I59e16ed11fdba6911f2751195d182e68aed96851
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/735481
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
This commit is contained in:
Alex Frid
2015-04-23 22:21:07 -07:00
committed by Ishan Mittal
parent 11e732387d
commit 30e47f6984
2 changed files with 7 additions and 6 deletions
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12
drivers/gpu/nvgpu/gk20a/clk_gk20a.c
View File

@@ -39,6 +39,10 @@ static struct pll_parms gpc_pll_params = {
1, 255, /* M */
8, 255, /* N */
1, 32, /* PL */
0, 0, 0, 0, 0, /* NA mode parameters: not supported on GK20A */
500, /* Locking and ramping timeout */
0, /* NA mode lock delay: not supported on GK20A */
2, /* IDDQ mode exit delay */
};
#ifdef CONFIG_DEBUG_FS
@@ -185,7 +189,7 @@ static int clk_slide_gpc_pll(struct gk20a *g, u32 n)
{
u32 data, coeff;
u32 nold;
int ramp_timeout = 500;
int ramp_timeout = gpc_pll_params.lock_timeout;
/* get old coefficients */
coeff = gk20a_readl(g, trim_sys_gpcpll_coeff_r());
@@ -307,7 +311,7 @@ static int clk_program_gpc_pll(struct gk20a *g, struct clk_gk20a *clk,
trim_sys_gpcpll_cfg_iddq_power_on_v());
gk20a_writel(g, trim_sys_gpcpll_cfg_r(), cfg);
gk20a_readl(g, trim_sys_gpcpll_cfg_r());
udelay(2);
udelay(gpc_pll_params.iddq_exit_delay);
}
/* disable PLL before changing coefficients */
@@ -341,7 +345,7 @@ static int clk_program_gpc_pll(struct gk20a *g, struct clk_gk20a *clk,
}
/* wait pll lock */
timeout = clk->pll_delay / 2 + 1;
timeout = gpc_pll_params.lock_timeout / 2 + 1;
do {
cfg = gk20a_readl(g, trim_sys_gpcpll_cfg_r());
if (cfg & trim_sys_gpcpll_cfg_pll_lock_true_f())
@@ -456,8 +460,6 @@ static int gk20a_init_clk_setup_sw(struct gk20a *g)
}
ref_rate = clk_get_rate(ref);
clk->pll_delay = 300; /* usec */
clk->gpc_pll.id = GK20A_GPC_PLL;
clk->gpc_pll.clk_in = ref_rate / KHZ;

1
drivers/gpu/nvgpu/gk20a/clk_gk20a.h
View File

@@ -79,7 +79,6 @@ struct clk_gk20a {
struct clk *tegra_clk;
struct pll gpc_pll;
struct pll gpc_pll_last;
u32 pll_delay; /* default PLL settle time */
struct mutex clk_mutex;
bool sw_ready;
bool clk_hw_on;