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PM / devfreq: rockchip-dfi: introduce channel mask

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Different Rockchip SoC variants have a different number of channels.
Introduce a channel mask to make the number of channels configurable
from SoC initialization code.

Link: https://lore.kernel.org/all/20231018061714.3553817-8-s.hauer@pengutronix.de/
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Sascha Hauer 2023-10-18 08:16:55 +02:00 committed by Chanwoo Choi
parent 9991166494
commit 63dcf38eb5
1 changed files with 19 additions and 6 deletions
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25
drivers/devfreq/event/rockchip-dfi.c
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@ -18,10 +18,11 @@
#include <linux/list.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/bits.h>
#include <soc/rockchip/rk3399_grf.h>
#define RK3399_DMC_NUM_CH 2
#define DMC_MAX_CHANNELS 2
/* DDRMON_CTRL */
#define DDRMON_CTRL 0x04
@ -44,7 +45,7 @@ struct dmc_count_channel {
};
struct dmc_count {
struct dmc_count_channel c[RK3399_DMC_NUM_CH];
struct dmc_count_channel c[DMC_MAX_CHANNELS];
};
/*
@ -61,6 +62,8 @@ struct rockchip_dfi {
struct regmap *regmap_pmu;
struct clk *clk;
u32 ddr_type;
unsigned int channel_mask;
unsigned int max_channels;
};
static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
@ -95,7 +98,9 @@ static void rockchip_dfi_read_counters(struct devfreq_event_dev *edev, struct dm
u32 i;
void __iomem *dfi_regs = dfi->regs;
for (i = 0; i < RK3399_DMC_NUM_CH; i++) {
for (i = 0; i < dfi->max_channels; i++) {
if (!(dfi->channel_mask & BIT(i)))
continue;
count->c[i].access = readl_relaxed(dfi_regs +
DDRMON_CH0_DFI_ACCESS_NUM + i * 20);
count->c[i].total = readl_relaxed(dfi_regs +
@ -145,9 +150,14 @@ static int rockchip_dfi_get_event(struct devfreq_event_dev *edev,
rockchip_dfi_read_counters(edev, &count);
/* We can only report one channel, so find the busiest one */
for (i = 0; i < RK3399_DMC_NUM_CH; i++) {
u32 a = count.c[i].access - last->c[i].access;
u32 t = count.c[i].total - last->c[i].total;
for (i = 0; i < dfi->max_channels; i++) {
u32 a, t;
if (!(dfi->channel_mask & BIT(i)))
continue;
a = count.c[i].access - last->c[i].access;
t = count.c[i].total - last->c[i].total;
if (a > access) {
access = a;
@ -185,6 +195,9 @@ static int rk3399_dfi_init(struct rockchip_dfi *dfi)
dfi->ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
RK3399_PMUGRF_DDRTYPE_MASK;
dfi->channel_mask = GENMASK(1, 0);
dfi->max_channels = 2;
return 0;
};