40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
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From 354584ddce4f32563c41c5623f4b92f26713e3ae Mon Sep 17 00:00:00 2001
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From: YouMin Chen <cym@rock-chips.com>
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Date: Tue, 5 Mar 2019 19:38:11 +0800
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Subject: [PATCH] PM / devfreq: rockchip-dfi: fix lpddr4 calculation error
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Fix lpddr4 calculation error about access.
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LPDDR4 BL(burst length) = 16,other DDR type BL(burst length) = 8.
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Change-Id: Icc1b4f6764fa0b23ec1f7722bda8ffeff1da4ab7
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Signed-off-by: YouMin Chen <cym@rock-chips.com>
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---
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drivers/devfreq/event/rockchip-dfi.c | 14 +++++++++++---
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1 file changed, 11 insertions(+), 3 deletions(-)
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--- a/drivers/devfreq/event/rockchip-dfi.c
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+++ b/drivers/devfreq/event/rockchip-dfi.c
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@@ -374,11 +374,19 @@ static int rockchip_dfi_get_busier_ch(st
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for (i = 0; i < MAX_DMC_NUM_CH; i++) {
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if (!(info->ch_msk & BIT(i)))
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continue;
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- info->ch_usage[i].access = readl_relaxed(dfi_regs +
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- DDRMON_CH0_DFI_ACCESS_NUM + i * 20) * 4;
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+
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info->ch_usage[i].total = readl_relaxed(dfi_regs +
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DDRMON_CH0_COUNT_NUM + i * 20);
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- tmp = info->ch_usage[i].access;
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+
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+ /* LPDDR4 BL = 16,other DDR type BL = 8 */
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+ tmp = readl_relaxed(dfi_regs +
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+ DDRMON_CH0_DFI_ACCESS_NUM + i * 20);
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+ if (info->dram_type == LPDDR4)
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+ tmp *= 8;
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+ else
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+ tmp *= 4;
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+ info->ch_usage[i].access = tmp;
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+
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if (tmp > max) {
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busier_ch = i;
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max = tmp;
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