Right now we use fixed indexes to assign power-domains, with a
requirement for the TOP GDSC to come last in the list.
Adding support for named power-domains means the declaration in the dtsi
can come in any order.
After this change we continue to support the old indexing - if a SoC
resource declration or the in-use dtb doesn't declare power-domain names
we fall back to the default legacy indexing.
>From this point on though new SoC additions should contain named
power-domains, eventually we will drop support for legacy indexing.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
---
drivers/media/platform/qcom/camss/camss-vfe.c | 24 ++++++++++++++++-
drivers/media/platform/qcom/camss/camss.c | 26 +++++++++++++++----
drivers/media/platform/qcom/camss/camss.h | 2 ++
3 files changed, 46 insertions(+), 6 deletions(-)
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index bc14ae4771e31..12c64c505befd 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1381,7 +1381,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
if (!res->line_num)
return -EINVAL;
- if (camss->genpd) {
+ /* Power domain */
+
+ if (res->pd_name) {
+ vfe->genpd = dev_pm_domain_attach_by_name(camss->dev,
+ res->pd_name);
+ if (IS_ERR(vfe->genpd)) {
+ ret = PTR_ERR(vfe->genpd);
+ return ret;
+ }
+ }
+
+ if (camss->genpd && !vfe->genpd) {
+ /*
+ * Legacy magic index.
+ * Requires
+ * power-domain = <VFE_X>,
+ * <VFE_Y>,
+ * <TITAN_TOP>
+ * id must correspondng to the index of the VFE which must
+ * come before the TOP GDSC. VFE Lite has no individually
+ * collapasible domain which is why id < vfe_num is a valid
+ * check.
+ */
vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
if (IS_ERR(vfe->genpd)) {
ret = PTR_ERR(vfe->genpd);
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 523b36d86f6cf..fb5276f4d9448 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1506,12 +1506,28 @@ static int camss_configure_pd(struct camss *camss)
return 0;
/*
- * VFE power domains are in the beginning of the list, and while all
- * power domains should be attached, only if TITAN_TOP power domain is
- * found in the list, it should be linked over here.
+ * If a power-domain name is defined try to use it.
+ * It is possible we are running a new kernel with an old dtb so
+ * fallback to indexes even if a pd_name is defined but not found.
*/
- camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
- if (IS_ERR(camss->genpd)) {
+ if (camss->res->pd_name) {
+ camss->genpd = dev_pm_domain_attach_by_name(camss->dev,
+ camss->res->pd_name);
+ if (IS_ERR(camss->genpd)) {
+ ret = PTR_ERR(camss->genpd);
+ goto fail_pm;
+ }
+ }
+
+ if (!camss->genpd) {
+ /*
+ * Legacy magic index. TITAN_TOP GDSC must be the last
+ * item in the power-domain list.
+ */
+ camss->genpd = dev_pm_domain_attach_by_id(camss->dev,
+ camss->genpd_num - 1);
+ }
+ if (IS_ERR_OR_NULL(camss->genpd)) {
ret = PTR_ERR(camss->genpd);
goto fail_pm;
}
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 95486c494afc6..6762ce9631476 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -48,6 +48,7 @@ struct camss_subdev_resources {
u32 clock_rate[CAMSS_RES_MAX][CAMSS_RES_MAX];
char *reg[CAMSS_RES_MAX];
char *interrupt[CAMSS_RES_MAX];
+ char *pd_name;
u8 line_num;
const void *ops;
};
@@ -83,6 +84,7 @@ enum icc_count {
struct camss_resources {
enum camss_version version;
+ const char *pd_name;
const struct camss_subdev_resources *csiphy_res;
const struct camss_subdev_resources *csid_res;
const struct camss_subdev_resources *ispif_res;
--
2.42.0
