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PM / devfreq: rockchip-dfi: fix lpddr4 calculation error

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Fix lpddr4 calculation error about access.
LPDDR4 BL(burst length) = 16,other DDR type BL(burst length) = 8.

Change-Id: Icc1b4f6764fa0b23ec1f7722bda8ffeff1da4ab7
Signed-off-by: YouMin Chen <cym@rock-chips.com>
This commit is contained in:
YouMin Chen
2019-03-05 19:38:11 +08:00
committed by Tao Huang
parent 8b8caafc45
commit 2f756f615c
1 changed files with 11 additions and 3 deletions
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14
drivers/devfreq/event/rockchip-dfi.c
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@@ -380,11 +380,19 @@ static int rockchip_dfi_get_busier_ch(struct devfreq_event_dev *edev)
for (i = 0; i < MAX_DMC_NUM_CH; i++) {
if (!(info->ch_msk & BIT(i)))
continue;
info->ch_usage[i].access = readl_relaxed(dfi_regs +
DDRMON_CH0_DFI_ACCESS_NUM + i * 20) * 4;
info->ch_usage[i].total = readl_relaxed(dfi_regs +
DDRMON_CH0_COUNT_NUM + i * 20);
tmp = info->ch_usage[i].access;
/* LPDDR4 BL = 16,other DDR type BL = 8 */
tmp = readl_relaxed(dfi_regs +
DDRMON_CH0_DFI_ACCESS_NUM + i * 20);
if (info->dram_type == LPDDR4)
tmp *= 8;
else
tmp *= 4;
info->ch_usage[i].access = tmp;
if (tmp > max) {
busier_ch = i;
max = tmp;