The current code tries to handle the case where CONFIG_PM isn't selected
by first calling our runtime_resume implementation and then properly
report the power state to the runtime_pm core.
This allows to have a functionning device even if pm_runtime_get_*
functions are nops.
However, the device power state if CONFIG_PM is enabled is
RPM_SUSPENDED, and thus our vc4_hdmi_write() and vc4_hdmi_read() calls
in the runtime_pm hooks will now report a warning since the device might
not be properly powered.
Even more so, we need CONFIG_PM enabled since the previous RaspberryPi
have a power domain that needs to be powered up for the HDMI controller
to be usable.
The previous patch has created a dependency on CONFIG_PM, now we can
just assume it's there and only call pm_runtime_resume_and_get() to make
sure our device is powered in bind.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 77e3ec52b175..73fb2f91c3e4 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -2971,18 +2971,16 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
vc4_hdmi->disable_4kp60 = true;
}
- /*
- * We need to have the device powered up at this point to call
- * our reset hook and for the CEC init.
- */
- ret = vc4_hdmi_runtime_resume(dev);
- if (ret)
- goto err_put_ddc;
-
- pm_runtime_get_noresume(dev);
- pm_runtime_set_active(dev);
pm_runtime_enable(dev);
+ /*
+ * We need to have the device powered up at this point to call
+ * our reset hook and for the CEC init.
+ */
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ goto err_disable_runtime_pm;
+
if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") ||
of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) &&
HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) {
@@ -3027,6 +3025,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
err_destroy_encoder:
drm_encoder_cleanup(encoder);
pm_runtime_put_sync(dev);
+err_disable_runtime_pm:
pm_runtime_disable(dev);
err_put_ddc:
put_device(&vc4_hdmi->ddc->dev);
--
2.36.1
