From: Vladimir Zapolskiy vladimir.zapolskiy@linaro.org
[ Upstream commit 3d658980e6dac2af6a024fdb6ded3d7bc44dc9ff ]
The change to dynamically allocated power domains neglected a case of CAMSS on MSM8916 platform, where a single VFE power domain is neither attached, linked or managed in runtime in any way explicitly.
This is a special case and it shall be kept as is, because the power domain management is done outside of the driver, and it's very different in comparison to all other platforms supported by CAMSS.
Fixes: 6b1814e26989 ("media: camss: Allocate power domain resources dynamically") Signed-off-by: Vladimir Zapolskiy vladimir.zapolskiy@linaro.org Reviewed-by: Robert Foss robert.foss@linaro.org Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/qcom/camss/camss.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index 1118c40886d5..a157cac72e0a 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -1465,6 +1465,14 @@ static int camss_configure_pd(struct camss *camss) return camss->genpd_num; }
+ /* + * If a platform device has just one power domain, then it is attached + * at platform_probe() level, thus there shall be no need and even no + * option to attach it again, this is the case for CAMSS on MSM8916. + */ + if (camss->genpd_num == 1) + return 0; + camss->genpd = devm_kmalloc_array(dev, camss->genpd_num, sizeof(*camss->genpd), GFP_KERNEL); if (!camss->genpd) @@ -1698,6 +1706,9 @@ void camss_delete(struct camss *camss)
pm_runtime_disable(camss->dev);
+ if (camss->genpd_num == 1) + return; + for (i = 0; i < camss->genpd_num; i++) { device_link_del(camss->genpd_link[i]); dev_pm_domain_detach(camss->genpd[i], true);