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misc: rockchip decompress: add dm resets support 

Using dm reset API to reset decompress module.

There seems to be some unknown cause to make the module
in abnormal state, which output the wrong decompress
data. Let's reset it before starting decompress.

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ic4113eec0701f83059453fa263810d31caa406eb
This commit is contained in:
Joseph Chen 2020-07-27 11:12:54 +08:00
parent ed670690bb
commit b367c66bb3
1 changed files with 17 additions and 6 deletions
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23
drivers/misc/rockchip_decompress.c
View File

@ -8,6 +8,7 @@
#include <linux/bitops.h>
#include <misc.h>
#include <irq-generic.h>
#include <reset.h>
DECLARE_GLOBAL_DATA_PTR;
@ -80,8 +81,8 @@ DECLARE_GLOBAL_DATA_PTR;
HDEIEN | DSIEN)
struct rockchip_decom_priv {
struct reset_ctl rst;
void __iomem *base;
unsigned long soft_reset_base;
bool idle_check_once;
bool done;
int cached; /* 1: access the data through dcache; 0: no dcache */
@ -95,6 +96,11 @@ static int rockchip_decom_start(struct udevice *dev, void *buf)
unsigned int limit_hi = param->size_src >> 32;
ulong align_input, align_len;
#if CONFIG_IS_ENABLED(DM_RESET)
reset_assert(&priv->rst);
udelay(10);
reset_deassert(&priv->rst);
#endif
if (!priv->cached) {
/* src: make sure we get the real compressed data from ddr */
align_input =
@ -119,9 +125,6 @@ static int rockchip_decom_start(struct udevice *dev, void *buf)
priv->done = false;
writel(0x00800080, priv->soft_reset_base);
writel(0x00800000, priv->soft_reset_base);
if (param->mode == DECOM_LZ4)
writel(LZ4_CONT_CSUM_CHECK_EN |
LZ4_HEAD_CSUM_CHECK_EN |
@ -233,14 +236,22 @@ static int rockchip_decom_ofdata_to_platdata(struct udevice *dev)
return -ENOENT;
priv->cached = dev_read_u32_default(dev, "data-cached", 0);
priv->soft_reset_base = dev_read_u32_default(dev, "soft-reset-addr", 0)
& 0xffffffff;
return 0;
}
static int rockchip_decom_probe(struct udevice *dev)
{
#if CONFIG_IS_ENABLED(DM_RESET)
struct rockchip_decom_priv *priv = dev_get_priv(dev);
int ret;
ret = reset_get_by_name(dev, "dresetn", &priv->rst);
if (ret) {
debug("reset_get_by_name() failed: %d\n", ret);
return ret;
}
#endif
return 0;
}