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sunxi: Fix H3 DRAM DQ read delay configuration

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The read delays were set incorrectly, leading to reliability
issues at higher DRAM clock speeds. This commit adjusts this
to match the vendor boot0 behaviour.

Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Tested-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
master
Jens Kuske 10 years ago committed by Hans de Goede
parent 23baf66f25
commit bb3654629a
1 changed files with 6 additions and 6 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 12
      arch/arm/cpu/armv7/sunxi/dram_sun8i_h3.c

12
arch/arm/cpu/armv7/sunxi/dram_sun8i_h3.c
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@ -73,10 +73,10 @@ static void mctl_dq_delay(u32 read, u32 write)
for (i = 0; i < 4; i++) { for (i = 0; i < 4; i++) {
val = DATX_IOCR_WRITE_DELAY((write >> (i * 4)) & 0xf) | val = DATX_IOCR_WRITE_DELAY((write >> (i * 4)) & 0xf) |
DATX_IOCR_READ_DELAY((read >> (i * 4)) & 0xf); DATX_IOCR_READ_DELAY(((read >> (i * 4)) & 0xf) * 2);
for (j = DATX_IOCR_DQ(0); j <= DATX_IOCR_DM; j++) for (j = DATX_IOCR_DQ(0); j <= DATX_IOCR_DM; j++)
setbits_le32(&mctl_ctl->datx[i].iocr[j], val); writel(val, &mctl_ctl->datx[i].iocr[j]);
} }
clrbits_le32(&mctl_ctl->pgcr[0], 1 << 26); clrbits_le32(&mctl_ctl->pgcr[0], 1 << 26);
@ -85,8 +85,8 @@ static void mctl_dq_delay(u32 read, u32 write)
val = DATX_IOCR_WRITE_DELAY((write >> (16 + i * 4)) & 0xf) | val = DATX_IOCR_WRITE_DELAY((write >> (16 + i * 4)) & 0xf) |
DATX_IOCR_READ_DELAY((read >> (16 + i * 4)) & 0xf); DATX_IOCR_READ_DELAY((read >> (16 + i * 4)) & 0xf);
setbits_le32(&mctl_ctl->datx[i].iocr[DATX_IOCR_DQS], val); writel(val, &mctl_ctl->datx[i].iocr[DATX_IOCR_DQS]);
setbits_le32(&mctl_ctl->datx[i].iocr[DATX_IOCR_DQSN], val); writel(val, &mctl_ctl->datx[i].iocr[DATX_IOCR_DQSN]);
} }
setbits_le32(&mctl_ctl->pgcr[0], 1 << 26); setbits_le32(&mctl_ctl->pgcr[0], 1 << 26);
@ -436,8 +436,8 @@ unsigned long sunxi_dram_init(void)
(struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE; (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
struct dram_para para = { struct dram_para para = {
.read_delays = 0x00007979, .read_delays = 0x00007979, /* dram_tpr12 */
.write_delays = 0x6aaa0000, .write_delays = 0x6aaa0000, /* dram_tpr11 */
.dual_rank = 0, .dual_rank = 0,
.bus_width = 32, .bus_width = 32,
.row_bits = 15, .row_bits = 15,

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