Hi Adam,

Am Sonntag, dem 03.10.2021 um 05:43 -0500 schrieb Adam Ford:

On Fri, Oct 1, 2021 at 8:00 PM Lucas Stach [off-list ref] wrote:

quoted

This reverts commit a77ebdd9f553. It turns out that the VPU domain has no
different requirements, even though the downstream ATF implementation seems
to suggest otherwise. Powering on the domain with the reset asserted works
fine. As the changed sequence has caused sporadic issues with the GPU
domains, just revert the change to go back to the working sequence.

Cc: <redacted> # 5.14
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
---

Lucas,

I applied your series to the 5.14.y kernel to test with the
imx8mm-beacon board, but I found that it doesn't wake from sleep.
I'll experiment with other versions of ATF.  If nobody else has this
problem, I'll assume, it's an error on my part.

I've tested this series on the i.MX8MM-EVK and a custom (not yet
public) i.MX8MM board and both did work as expected with both system
suspend/resume and runtime power management for the display parts. I've
used the upstream TF-A release v2.5.

Regards,
Lucas

adam

quoted

 drivers/soc/imx/gpcv2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 34a9ac1f2b9b..8b7a01773aec 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c

@@ -244,6 +244,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
                goto out_regulator_disable;
        }

+       reset_control_assert(domain->reset);
+
        if (domain->bits.pxx) {
                /* request the domain to power up */
                regmap_update_bits(domain->regmap, GPC_PU_PGC_SW_PUP_REQ,

@@ -266,8 +268,6 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
                                  GPC_PGC_CTRL_PCR);
        }

-       reset_control_assert(domain->reset);
-
        /* delay for reset to propagate */
        udelay(5);

--

2.30.2

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