diff options
| author | Leonard Crestez <leonard.crestez@nxp.com> | 2019-04-30 18:06:12 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-05-13 11:51:31 +0300 |
| commit | 8d5d766f00726efd0abd2e7835b0e538fe4ad6e4 (patch) | |
| tree | 075116346ac613427c243517359fa797c93dabe7 | |
| parent | ed61e18a4b4e445ae8622a4faec6a259601cc4a5 (diff) | |
| download | linux-8d5d766f00726efd0abd2e7835b0e538fe4ad6e4.tar.xz | |
soc: imx: gpc: Use GENPD_FLAG_RPM_ALWAYS_ON for ERR009619
This allows PU domain to be turned off in suspend and save power.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/soc/imx/gpc.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c index 7d14a4b4e82a..29b43651c261 100644 --- a/drivers/soc/imx/gpc.c +++ b/drivers/soc/imx/gpc.c @@ -431,10 +431,19 @@ static int imx_gpc_probe(struct platform_device *pdev) return ret; } - /* Disable PU power down in normal operation if ERR009619 is present */ + /* + * Disable PU power down by runtime PM if ERR009619 is present. + * + * The PRE clock will be paused for several cycles when turning on the + * PU domain LDO from power down state. If PRE is in use at that time, + * the IPU/PRG cannot get the correct display data from the PRE. + * + * This is not a concern when the whole system enters suspend state, so + * it's safe to power down PU in this case. + */ if (of_id_data->err009619_present) imx_gpc_domains[GPC_PGC_DOMAIN_PU].base.flags |= - GENPD_FLAG_ALWAYS_ON; + GENPD_FLAG_RPM_ALWAYS_ON; /* Keep DISP always on if ERR006287 is present */ if (of_id_data->err006287_present) |