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MLK-17083 soc: imx: limit VPU/CPU bandwidth for lcdif on i.MX8MQ 

Config NOC to limit bandwidth to 4GB for both VPU
and CPU to avoid lcdif flickering only when lcdif is enabled.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Bai Ping <ping.bai@nxp.com>
(cherry picked from commit 8ab89ebeb94a423792bf588bdf2354c5960d8f13)
pull/10/head
Anson Huang 2017-12-06 21:51:32 +08:00 committed by Jason Liu
parent 2b3f5aa4e8
commit 5fcf6c83c3
2 changed files with 33 additions and 0 deletions
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30
drivers/soc/imx/soc-imx8.c
View File

@ -257,6 +257,33 @@ static ssize_t imx8_get_soc_uid(struct device *dev,
static struct device_attribute imx8_uid =
__ATTR(soc_uid, S_IRUGO, imx8_get_soc_uid, NULL);
static void __init imx8mq_noc_init(void)
{
struct device_node *np;
const char *status;
int statlen;
struct arm_smccc_res res;
np = of_find_compatible_node(NULL, NULL, "fsl,imx8mq-lcdif");
if (!np)
return;
status = of_get_property(np, "status", &statlen);
if (status == NULL)
return;
if (statlen > 0) {
if (!strcmp(status, "disabled"))
return;
}
pr_info("Config NOC for VPU and CPU\n");
arm_smccc_smc(FSL_SIP_NOC, FSL_SIP_NOC_LCDIF, 0,
0, 0, 0, 0, 0, &res);
if (res.a0)
pr_err("Config NOC for VPU and CPU fail!\n");
}
static int __init imx8_soc_init(void)
{
struct soc_device_attribute *soc_dev_attr;
@ -287,6 +314,9 @@ static int __init imx8_soc_init(void)
device_create_file(soc_device_to_device(soc_dev), &imx8_uid);
if (of_machine_is_compatible("fsl,imx8mq"))
imx8mq_noc_init();
return 0;
free_rev:

3
include/soc/imx/fsl_sip.h
View File

@ -57,4 +57,7 @@
#define FSL_SIP_GET_SOC_INFO 0xc2000006
#define FSL_SIP_NOC 0xc2000008
#define FSL_SIP_NOC_LCDIF 0x0
#endif