V3:
- Includes bugfix reported on IRC
genpd_link and genpd should be checked for NULL on the cleanup path.
Matti Lehtimäki
- Retains NULL check before dev_pm_domain_attach_by_name()
I experimented with the suggested drop but of_property_match_string()
chokes
Link: https://lore.kernel.org/lkml/[email protected]/T/#m10e5a43d0245f13eca177ef2f65b24259c641030
Konrad
- Fixes spelling caught by codespell - Konrad
Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3
sm8250-testable: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3+sm8250
V2:
- Incorporates Konrad's suggestion re: removing 'id'
- Adds RB - Konrad
- Adds in a flag to indicate if a VFE has a power domain.
As I rebased this series I realised we had some magic indexing for VFE v
VFE Lite, which isn't the root cause of my bug bear in this series but is
the same sin - inferring functionality from indexing.
Once we transition fully to named pds we won't need a 'has_pd' to flag
which VFEs need power-domain attachment and which don't.
That transition will require populating all upstream dtsi with pd-names
and then deprecating the old way.
has_pd is a far better choice than inferring from indexes so, I've added.
Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/commits/aa45a2b58aa1e187a2698a65164d694251f08fa1
V1:
At the moment the Qcom CAMSS driver relies on the declaration order of
power-domains within the dtsi to determine which power-domain relates to a
VFE and which power-domain relates to the top-level (top) CAMSS
power-domain.
VFE power-domains must be declared prior to the top power-domain. The top
power-domain must be declared last. Early SoCs have just one top
power-domain with later SoCs introducing VFE specific power-domains.
Differentiating between the number of power-domains results in lots of code
which is brittle and which we can mostly get rid of with named
power-domains.
The reliance on declaration ordering is in-effect magic number indexing.
This series introduces named power-domains for CAMSS and refactors some of
the code in CAMSS to support the new named power-domains. We continue to
support the legacy indexing model with an intention to remove after a
reasonable transition period.
New SoC additions should use named power-domains from now on.
Tested on x13s, rb5, db410c
Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/linux-next-23-10-23-camss-named-power-domains
Bryan O'Donoghue (5):
media: qcom: camss: Flag which VFEs require a power-domain
media: qcom: camss: Convert to per-VFE pointer for power-domain
linkages
media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where
applicable
media: qcom: camss: Move VFE power-domain specifics into vfe.c
media: qcom: camss: Add support for named power-domains
.../media/platform/qcom/camss/camss-vfe-170.c | 36 --------
.../media/platform/qcom/camss/camss-vfe-4-1.c | 8 +-
.../media/platform/qcom/camss/camss-vfe-4-7.c | 36 --------
.../media/platform/qcom/camss/camss-vfe-4-8.c | 31 -------
.../media/platform/qcom/camss/camss-vfe-480.c | 36 --------
drivers/media/platform/qcom/camss/camss-vfe.c | 77 ++++++++++++++++
drivers/media/platform/qcom/camss/camss-vfe.h | 16 ++++
drivers/media/platform/qcom/camss/camss.c | 87 ++++++++++++-------
drivers/media/platform/qcom/camss/camss.h | 7 +-
9 files changed, 156 insertions(+), 178 deletions(-)
--
2.42.0
---
Bryan O'Donoghue (5):
media: qcom: camss: Flag which VFEs require a power-domain
media: qcom: camss: Convert to per-VFE pointer for power-domain linkages
media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable
media: qcom: camss: Move VFE power-domain specifics into vfe.c
media: qcom: camss: Add support for named power-domains
drivers/media/platform/qcom/camss/camss-vfe-170.c | 36 ----------
drivers/media/platform/qcom/camss/camss-vfe-4-1.c | 8 +--
drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 36 ----------
drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 31 --------
drivers/media/platform/qcom/camss/camss-vfe-480.c | 36 ----------
drivers/media/platform/qcom/camss/camss-vfe.c | 79 ++++++++++++++++++++
drivers/media/platform/qcom/camss/camss-vfe.h | 16 +++++
drivers/media/platform/qcom/camss/camss.c | 87 ++++++++++++++---------
drivers/media/platform/qcom/camss/camss.h | 7 +-
9 files changed, 158 insertions(+), 178 deletions(-)
---
base-commit: 48016737a9af47328dd321df4dd3479ed5e2041d
change-id: 20231031-b4-camss-named-power-domains-cc2ac2722543
Best regards,
--
Bryan O'Donoghue <[email protected]>
Right now we use the top-level camss structure to provide pointers via
VFE id index back to genpd linkages.
In effect this hard-codes VFE indexes to power-domain indexes in the
dtsi and mandates a very particular ordering of power domains in the
dtsi, which bears no relationship to a real hardware dependency.
As a first step to rationalising the VFE power-domain code and breaking
the magic indexing in dtsi use per-VFE pointers to genpd linkages.
The top-level index in msm_vfe_subdev_init is still used to attain the
initial so no functional or logical change arises from this change.
Reviewed-by: Konrad Dybcio <[email protected]>
Signed-off-by: Bryan O'Donoghue <[email protected]>
---
drivers/media/platform/qcom/camss/camss-vfe-170.c | 15 +++++++--------
drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 15 +++++----------
drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 13 +++++--------
drivers/media/platform/qcom/camss/camss-vfe-480.c | 15 +++++++--------
drivers/media/platform/qcom/camss/camss-vfe.c | 3 +++
drivers/media/platform/qcom/camss/camss-vfe.h | 2 ++
6 files changed, 29 insertions(+), 34 deletions(-)
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-170.c b/drivers/media/platform/qcom/camss/camss-vfe-170.c
index 0b211fed12760..7451484317cc3 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -638,7 +638,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
if (vfe->id >= camss->res->vfe_num)
return;
- device_link_del(camss->genpd_link[vfe->id]);
+ device_link_del(vfe->genpd_link);
}
/*
@@ -648,16 +648,15 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
static int vfe_pm_domain_on(struct vfe_device *vfe)
{
struct camss *camss = vfe->camss;
- enum vfe_line_id id = vfe->id;
- if (id >= camss->res->vfe_num)
+ if (vfe->id >= camss->res->vfe_num)
return 0;
- camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id],
- DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME |
- DL_FLAG_RPM_ACTIVE);
- if (!camss->genpd_link[id])
+ vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+ DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_RPM_ACTIVE);
+ if (!vfe->genpd_link)
return -EINVAL;
return 0;
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
index b65ed0fef595e..2b4e7e039407b 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
@@ -1109,14 +1109,10 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
*/
static void vfe_pm_domain_off(struct vfe_device *vfe)
{
- struct camss *camss;
-
if (!vfe)
return;
- camss = vfe->camss;
-
- device_link_del(camss->genpd_link[vfe->id]);
+ device_link_del(vfe->genpd_link);
}
/*
@@ -1126,13 +1122,12 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
static int vfe_pm_domain_on(struct vfe_device *vfe)
{
struct camss *camss = vfe->camss;
- enum vfe_line_id id = vfe->id;
- camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id], DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
+ vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
- if (!camss->genpd_link[id]) {
- dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", id);
+ if (!vfe->genpd_link) {
+ dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
return -EINVAL;
}
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
index 7b3805177f037..5e95343241304 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
@@ -1099,9 +1099,7 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
*/
static void vfe_pm_domain_off(struct vfe_device *vfe)
{
- struct camss *camss = vfe->camss;
-
- device_link_del(camss->genpd_link[vfe->id]);
+ device_link_del(vfe->genpd_link);
}
/*
@@ -1111,13 +1109,12 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
static int vfe_pm_domain_on(struct vfe_device *vfe)
{
struct camss *camss = vfe->camss;
- enum vfe_line_id id = vfe->id;
- camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id], DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
+ vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
- if (!camss->genpd_link[id]) {
- dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", id);
+ if (!vfe->genpd_link) {
+ dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
return -EINVAL;
}
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/media/platform/qcom/camss/camss-vfe-480.c
index f2368b77fc6d6..a70b8633bb3eb 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -463,7 +463,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
if (vfe->id >= camss->res->vfe_num)
return;
- device_link_del(camss->genpd_link[vfe->id]);
+ device_link_del(vfe->genpd_link);
}
/*
@@ -473,16 +473,15 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
static int vfe_pm_domain_on(struct vfe_device *vfe)
{
struct camss *camss = vfe->camss;
- enum vfe_line_id id = vfe->id;
- if (id >= camss->res->vfe_num)
+ if (vfe->id >= camss->res->vfe_num)
return 0;
- camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id],
- DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME |
- DL_FLAG_RPM_ACTIVE);
- if (!camss->genpd_link[id])
+ vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+ DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_RPM_ACTIVE);
+ if (!vfe->genpd_link)
return -EINVAL;
return 0;
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 4839e2cedfe58..94267b9974554 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1347,6 +1347,9 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
if (!res->line_num)
return -EINVAL;
+ if (res->has_pd)
+ vfe->genpd = camss->genpd[id];
+
vfe->line_num = res->line_num;
vfe->ops->subdev_init(dev, vfe);
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index 09baded0dcdd6..c1c50023d4876 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -150,6 +150,8 @@ struct vfe_device {
const struct vfe_hw_ops_gen1 *ops_gen1;
struct vfe_isr_ops isr_ops;
struct camss_video_ops video_ops;
+ struct device *genpd;
+ struct device_link *genpd_link;
};
struct camss_subdev_resources;
--
2.42.0
At the moment we have some complex code for determining if a VFE requires a
power-domain attachment. Particularly discordant in this scheme is the
subtle reliance on VFE and VFE Lite declaration ordering in our resources.
VFE id is used to determine if a VFE is lite or not and consequently if a
VFE requires power-domain attachment. VFE Lite though is not a correct
delineation between power-domain and non power-domain state since early
SoCs have neither VFE Lite nor power-domains attached to VFEs.
Introduce has_pd to the VFE resource structure to allow the CAMSS code to
understand if it needs to try to attach a power-domain for a given VFE.
As a side-effect from this we no longer need to care about VFE Lite or
non-Lite or the id number associated with either and which order the
VFE/VFE Lite was declared in.
Reviewed-by: Konrad Dybcio <[email protected]>
Signed-off-by: Bryan O'Donoghue <[email protected]>
---
drivers/media/platform/qcom/camss/camss.c | 8 ++++++++
drivers/media/platform/qcom/camss/camss.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index 8e78dd8d5961e..ed01a3ac7a38e 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -278,6 +278,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
.reg = { "vfe0" },
.interrupt = { "vfe0" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_4_7
},
@@ -298,6 +299,7 @@ static const struct camss_subdev_resources vfe_res_8x96[] = {
.reg = { "vfe1" },
.interrupt = { "vfe1" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_4_7
}
};
@@ -468,6 +470,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
.reg = { "vfe0" },
.interrupt = { "vfe0" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_4_8
},
@@ -491,6 +494,7 @@ static const struct camss_subdev_resources vfe_res_660[] = {
.reg = { "vfe1" },
.interrupt = { "vfe1" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_4_8
}
};
@@ -658,6 +662,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
.reg = { "vfe0" },
.interrupt = { "vfe0" },
.line_num = 4,
+ .has_pd = true,
.ops = &vfe_ops_170
},
@@ -680,6 +685,7 @@ static const struct camss_subdev_resources vfe_res_845[] = {
.reg = { "vfe1" },
.interrupt = { "vfe1" },
.line_num = 4,
+ .has_pd = true,
.ops = &vfe_ops_170
},
@@ -840,6 +846,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
.reg = { "vfe0" },
.interrupt = { "vfe0" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_480
},
/* VFE1 */
@@ -860,6 +867,7 @@ static const struct camss_subdev_resources vfe_res_8250[] = {
.reg = { "vfe1" },
.interrupt = { "vfe1" },
.line_num = 3,
+ .has_pd = true,
.ops = &vfe_ops_480
},
/* VFE2 (lite) */
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index 8acad7321c09d..b854cff1774d4 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -49,6 +49,7 @@ struct camss_subdev_resources {
char *reg[CAMSS_RES_MAX];
char *interrupt[CAMSS_RES_MAX];
u8 line_num;
+ bool has_pd;
const void *ops;
};
--
2.42.0
For the various versions of VFE we have a boiler-plate
pm_domain_on/pm_domain_off callback pair of the general form.
- Error check.
Not always done but applicable to all.
- device_link_add (DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
DL_FLAG_RPM_ACTIVE);
- Error check returning -EINVAL on error.
- Return 0
Reduce the pattern down to a common callback. VFE 4.1 is a special case
which to me also indicates that it is worthwhile maintaining an indirection
for the vfe_pm_domain_{on|off} for now.
Otherwise lets chuck out a bunch of needlessly replicated code.
Reviewed-by: Konrad Dybcio <[email protected]>
Suggested-by: Matti Lehtimäki <[email protected]>
Signed-off-by: Bryan O'Donoghue <[email protected]>
---
drivers/media/platform/qcom/camss/camss-vfe-170.c | 35 -----------------------
drivers/media/platform/qcom/camss/camss-vfe-4-1.c | 8 +++---
drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 31 --------------------
drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 28 ------------------
drivers/media/platform/qcom/camss/camss-vfe-480.c | 35 -----------------------
drivers/media/platform/qcom/camss/camss-vfe.c | 34 ++++++++++++++++++++++
drivers/media/platform/qcom/camss/camss-vfe.h | 12 ++++++++
7 files changed, 50 insertions(+), 133 deletions(-)
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-170.c b/drivers/media/platform/qcom/camss/camss-vfe-170.c
index 7451484317cc3..795ac3815339a 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -627,41 +627,6 @@ static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
spin_unlock_irqrestore(&vfe->output_lock, flags);
}
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- if (vfe->id >= camss->res->vfe_num)
- return;
-
- device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- if (vfe->id >= camss->res->vfe_num)
- return 0;
-
- vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
- DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME |
- DL_FLAG_RPM_ACTIVE);
- if (!vfe->genpd_link)
- return -EINVAL;
-
- return 0;
-}
-
/*
* vfe_queue_buffer - Add empty buffer
* @vid: Video device structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
index 2911e4126e7ad..ef6b34c915df1 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c
@@ -936,7 +936,7 @@ static irqreturn_t vfe_isr(int irq, void *dev)
* vfe_pm_domain_off - Disable power domains specific to this VFE.
* @vfe: VFE Device
*/
-static void vfe_pm_domain_off(struct vfe_device *vfe)
+static void vfe_4_1_pm_domain_off(struct vfe_device *vfe)
{
/* nop */
}
@@ -945,7 +945,7 @@ static void vfe_pm_domain_off(struct vfe_device *vfe)
* vfe_pm_domain_on - Enable power domains specific to this VFE.
* @vfe: VFE Device
*/
-static int vfe_pm_domain_on(struct vfe_device *vfe)
+static int vfe_4_1_pm_domain_on(struct vfe_device *vfe)
{
return 0;
}
@@ -999,8 +999,8 @@ const struct vfe_hw_ops vfe_ops_4_1 = {
.hw_version = vfe_hw_version,
.isr_read = vfe_isr_read,
.isr = vfe_isr,
- .pm_domain_off = vfe_pm_domain_off,
- .pm_domain_on = vfe_pm_domain_on,
+ .pm_domain_off = vfe_4_1_pm_domain_off,
+ .pm_domain_on = vfe_4_1_pm_domain_on,
.reg_update_clear = vfe_reg_update_clear,
.reg_update = vfe_reg_update,
.subdev_init = vfe_subdev_init,
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
index 2b4e7e039407b..7655d22a9fda2 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
@@ -1103,37 +1103,6 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
writel_relaxed(VFE_0_IRQ_CMD_GLOBAL_CLEAR, vfe->base + VFE_0_IRQ_CMD);
}
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
- if (!vfe)
- return;
-
- device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
-
- if (!vfe->genpd_link) {
- dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
- return -EINVAL;
- }
-
- return 0;
-}
-
static void vfe_violation_read(struct vfe_device *vfe)
{
u32 violation = readl_relaxed(vfe->base + VFE_0_VIOLATION_STATUS);
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
index 5e95343241304..f52fa30f3853e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
@@ -1093,34 +1093,6 @@ static void vfe_isr_read(struct vfe_device *vfe, u32 *value0, u32 *value1)
writel_relaxed(VFE_0_IRQ_CMD_GLOBAL_CLEAR, vfe->base + VFE_0_IRQ_CMD);
}
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
- device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- vfe->genpd_link = device_link_add(camss->dev, vfe->genpd, DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
-
- if (!vfe->genpd_link) {
- dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", vfe->id);
- return -EINVAL;
- }
-
- return 0;
-}
-
static void vfe_violation_read(struct vfe_device *vfe)
{
u32 violation = readl_relaxed(vfe->base + VFE_0_VIOLATION_STATUS);
diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/media/platform/qcom/camss/camss-vfe-480.c
index a70b8633bb3eb..4652e8b4cff58 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -452,41 +452,6 @@ static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
spin_unlock_irqrestore(&vfe->output_lock, flags);
}
-/*
- * vfe_pm_domain_off - Disable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static void vfe_pm_domain_off(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- if (vfe->id >= camss->res->vfe_num)
- return;
-
- device_link_del(vfe->genpd_link);
-}
-
-/*
- * vfe_pm_domain_on - Enable power domains specific to this VFE.
- * @vfe: VFE Device
- */
-static int vfe_pm_domain_on(struct vfe_device *vfe)
-{
- struct camss *camss = vfe->camss;
-
- if (vfe->id >= camss->res->vfe_num)
- return 0;
-
- vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
- DL_FLAG_STATELESS |
- DL_FLAG_PM_RUNTIME |
- DL_FLAG_RPM_ACTIVE);
- if (!vfe->genpd_link)
- return -EINVAL;
-
- return 0;
-}
-
/*
* vfe_queue_buffer - Add empty buffer
* @vid: Video device structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 94267b9974554..5172eb5612a1c 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -474,6 +474,40 @@ void vfe_isr_reset_ack(struct vfe_device *vfe)
complete(&vfe->reset_complete);
}
+/*
+ * vfe_pm_domain_off - Disable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+void vfe_pm_domain_off(struct vfe_device *vfe)
+{
+ if (!vfe->genpd)
+ return;
+
+ device_link_del(vfe->genpd_link);
+ vfe->genpd_link = NULL;
+}
+
+/*
+ * vfe_pm_domain_on - Enable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+int vfe_pm_domain_on(struct vfe_device *vfe)
+{
+ struct camss *camss = vfe->camss;
+
+ if (!vfe->genpd)
+ return 0;
+
+ vfe->genpd_link = device_link_add(camss->dev, vfe->genpd,
+ DL_FLAG_STATELESS |
+ DL_FLAG_PM_RUNTIME |
+ DL_FLAG_RPM_ACTIVE);
+ if (!vfe->genpd_link)
+ return -EINVAL;
+
+ return 0;
+}
+
static int vfe_match_clock_names(struct vfe_device *vfe,
struct camss_clock *clock)
{
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index c1c50023d4876..992a2103ec44c 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -203,6 +203,18 @@ int vfe_reset(struct vfe_device *vfe);
*/
int vfe_disable(struct vfe_line *line);
+/*
+ * vfe_pm_domain_off - Disable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+void vfe_pm_domain_off(struct vfe_device *vfe);
+
+/*
+ * vfe_pm_domain_on - Enable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+int vfe_pm_domain_on(struct vfe_device *vfe);
+
extern const struct vfe_hw_ops vfe_ops_4_1;
extern const struct vfe_hw_ops vfe_ops_4_7;
extern const struct vfe_hw_ops vfe_ops_4_8;
--
2.42.0
Moving the location of the hooks to VFE power domains has several
advantages.
1. Separation of concerns and functional decomposition.
vfe.c should be responsible for and know best how manage
power-domains for a VFE, excising from camss.c follows this
principle.
2. Embedding a pointer to genpd in struct camss_vfe{} meas that we can
dispense with a bunch of kmalloc array inside of camss.c.
3. Splitting up titan top gdsc from vfe/ife gdsc provides a base for
breaking up magic indexes in dtsi.
Suggested-by: Matti Lehtimäki <[email protected]>
Signed-off-by: Bryan O'Donoghue <[email protected]>
---
drivers/media/platform/qcom/camss/camss-vfe.c | 24 +++++++++-
drivers/media/platform/qcom/camss/camss-vfe.h | 2 +
drivers/media/platform/qcom/camss/camss.c | 63 +++++++++++++--------------
drivers/media/platform/qcom/camss/camss.h | 4 +-
4 files changed, 56 insertions(+), 37 deletions(-)
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 5172eb5612a1c..defff24f07ce3 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -14,6 +14,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock_types.h>
#include <linux/spinlock.h>
@@ -1381,8 +1382,13 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
if (!res->line_num)
return -EINVAL;
- if (res->has_pd)
- vfe->genpd = camss->genpd[id];
+ if (res->has_pd) {
+ vfe->genpd = dev_pm_domain_attach_by_id(camss->dev, id);
+ if (IS_ERR(vfe->genpd)) {
+ ret = PTR_ERR(vfe->genpd);
+ return ret;
+ }
+ }
vfe->line_num = res->line_num;
vfe->ops->subdev_init(dev, vfe);
@@ -1506,6 +1512,20 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
return 0;
}
+/*
+ * msm_vfe_genpd_cleanup - Cleanup VFE genpd linkages
+ * @vfe: VFE device
+ *
+ */
+void msm_vfe_genpd_cleanup(struct vfe_device *vfe)
+{
+ if (vfe->genpd_link)
+ device_link_del(vfe->genpd_link);
+
+ if (vfe->genpd)
+ dev_pm_domain_detach(vfe->genpd, true);
+}
+
/*
* vfe_link_setup - Setup VFE connections
* @entity: Pointer to media entity structure
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.h b/drivers/media/platform/qcom/camss/camss-vfe.h
index 992a2103ec44c..cdbe59d8d437e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss/camss-vfe.h
@@ -159,6 +159,8 @@ struct camss_subdev_resources;
int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
const struct camss_subdev_resources *res, u8 id);
+void msm_vfe_genpd_cleanup(struct vfe_device *vfe);
+
int msm_vfe_register_entities(struct vfe_device *vfe,
struct v4l2_device *v4l2_dev);
diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index ed01a3ac7a38e..415164bf00402 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1487,7 +1487,6 @@ static const struct media_device_ops camss_media_ops = {
static int camss_configure_pd(struct camss *camss)
{
struct device *dev = camss->dev;
- int i;
int ret;
camss->genpd_num = of_count_phandle_with_args(dev->of_node,
@@ -1506,45 +1505,36 @@ static int camss_configure_pd(struct camss *camss)
if (camss->genpd_num == 1)
return 0;
- camss->genpd = devm_kmalloc_array(dev, camss->genpd_num,
- sizeof(*camss->genpd), GFP_KERNEL);
- if (!camss->genpd)
- return -ENOMEM;
-
- camss->genpd_link = devm_kmalloc_array(dev, camss->genpd_num,
- sizeof(*camss->genpd_link),
- GFP_KERNEL);
- if (!camss->genpd_link)
- return -ENOMEM;
+ /*
+ * If the number of power-domains is greater than the number of VFEs
+ * then the additional power-domain is for the entire CAMSS block the
+ * 'top' power-domain.
+ */
+ if (camss->genpd_num <= camss->res->vfe_num)
+ 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.
*/
- for (i = 0; i < camss->genpd_num; i++) {
- camss->genpd[i] = dev_pm_domain_attach_by_id(camss->dev, i);
- if (IS_ERR(camss->genpd[i])) {
- ret = PTR_ERR(camss->genpd[i]);
- goto fail_pm;
- }
+ camss->genpd = dev_pm_domain_attach_by_id(camss->dev, camss->genpd_num - 1);
+ if (IS_ERR(camss->genpd)) {
+ ret = PTR_ERR(camss->genpd);
+ goto fail_pm;
}
-
- if (i > camss->res->vfe_num) {
- camss->genpd_link[i - 1] = device_link_add(camss->dev, camss->genpd[i - 1],
- DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
- DL_FLAG_RPM_ACTIVE);
- if (!camss->genpd_link[i - 1]) {
- ret = -EINVAL;
- goto fail_pm;
- }
+ camss->genpd_link = device_link_add(camss->dev, camss->genpd,
+ DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
+ DL_FLAG_RPM_ACTIVE);
+ if (!camss->genpd_link) {
+ ret = -EINVAL;
+ goto fail_pm;
}
return 0;
fail_pm:
- for (--i ; i >= 0; i--)
- dev_pm_domain_detach(camss->genpd[i], true);
+ dev_pm_domain_detach(camss->genpd, true);
return ret;
}
@@ -1566,18 +1556,25 @@ static int camss_icc_get(struct camss *camss)
return 0;
}
-static void camss_genpd_cleanup(struct camss *camss)
+static void camss_genpd_subdevice_cleanup(struct camss *camss)
{
int i;
+ for (i = 0; i < camss->vfe_total_num; i++)
+ msm_vfe_genpd_cleanup(&camss->vfe[i]);
+}
+
+static void camss_genpd_cleanup(struct camss *camss)
+{
if (camss->genpd_num == 1)
return;
- if (camss->genpd_num > camss->res->vfe_num)
- device_link_del(camss->genpd_link[camss->genpd_num - 1]);
+ if (camss->genpd_link)
+ device_link_del(camss->genpd_link);
+
+ dev_pm_domain_detach(camss->genpd, true);
- for (i = 0; i < camss->genpd_num; i++)
- dev_pm_domain_detach(camss->genpd[i], true);
+ camss_genpd_subdevice_cleanup(camss);
}
/*
diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h
index b854cff1774d4..1ba824a2cb76c 100644
--- a/drivers/media/platform/qcom/camss/camss.h
+++ b/drivers/media/platform/qcom/camss/camss.h
@@ -107,8 +107,8 @@ struct camss {
struct vfe_device *vfe;
atomic_t ref_count;
int genpd_num;
- struct device **genpd;
- struct device_link **genpd_link;
+ struct device *genpd;
+ struct device_link *genpd_link;
struct icc_path *icc_path[ICC_SM8250_COUNT];
const struct camss_resources *res;
unsigned int vfe_total_num;
--
2.42.0
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 declaration 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 <[email protected]>
---
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 defff24f07ce3..123e5ead7602d 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -1382,7 +1382,29 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
if (!res->line_num)
return -EINVAL;
- if (res->has_pd) {
+ /* 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 (!vfe->genpd && res->has_pd) {
+ /*
+ * 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 415164bf00402..83c0c28a8c953 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -1514,12 +1514,28 @@ 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 1ba824a2cb76c..cd8186fe1797b 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;
bool has_pd;
const void *ops;
@@ -84,6 +85,7 @@ 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
On 1.11.2023 12.54, Bryan O'Donoghue wrote:
> V3:
> - Includes bugfix reported on IRC
> genpd_link and genpd should be checked for NULL on the cleanup path.
> Matti Lehtimäki
> - Retains NULL check before dev_pm_domain_attach_by_name()
> I experimented with the suggested drop but of_property_match_string()
> chokes
> Link: https://lore.kernel.org/lkml/[email protected]/T/#m10e5a43d0245f13eca177ef2f65b24259c641030
> Konrad
> - Fixes spelling caught by codespell - Konrad
>
> Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3
> sm8250-testable: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/b4/b4-camss-named-power-domains-v3+sm8250
>
> V2:
> - Incorporates Konrad's suggestion re: removing 'id'
> - Adds RB - Konrad
> - Adds in a flag to indicate if a VFE has a power domain.
> As I rebased this series I realised we had some magic indexing for VFE v
> VFE Lite, which isn't the root cause of my bug bear in this series but is
> the same sin - inferring functionality from indexing.
> Once we transition fully to named pds we won't need a 'has_pd' to flag
> which VFEs need power-domain attachment and which don't.
> That transition will require populating all upstream dtsi with pd-names
> and then deprecating the old way.
> has_pd is a far better choice than inferring from indexes so, I've added.
>
> Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/commits/aa45a2b58aa1e187a2698a65164d694251f08fa1
>
> V1:
> At the moment the Qcom CAMSS driver relies on the declaration order of
> power-domains within the dtsi to determine which power-domain relates to a
> VFE and which power-domain relates to the top-level (top) CAMSS
> power-domain.
>
> VFE power-domains must be declared prior to the top power-domain. The top
> power-domain must be declared last. Early SoCs have just one top
> power-domain with later SoCs introducing VFE specific power-domains.
>
> Differentiating between the number of power-domains results in lots of code
> which is brittle and which we can mostly get rid of with named
> power-domains.
>
> The reliance on declaration ordering is in-effect magic number indexing.
>
> This series introduces named power-domains for CAMSS and refactors some of
> the code in CAMSS to support the new named power-domains. We continue to
> support the legacy indexing model with an intention to remove after a
> reasonable transition period.
>
> New SoC additions should use named power-domains from now on.
>
> Tested on x13s, rb5, db410c
>
> Link: https://git.codelinaro.org/bryan.odonoghue/kernel/-/tree/linux-next-23-10-23-camss-named-power-domains
>
> Bryan O'Donoghue (5):
> media: qcom: camss: Flag which VFEs require a power-domain
> media: qcom: camss: Convert to per-VFE pointer for power-domain
> linkages
> media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where
> applicable
> media: qcom: camss: Move VFE power-domain specifics into vfe.c
> media: qcom: camss: Add support for named power-domains
>
> .../media/platform/qcom/camss/camss-vfe-170.c | 36 --------
> .../media/platform/qcom/camss/camss-vfe-4-1.c | 8 +-
> .../media/platform/qcom/camss/camss-vfe-4-7.c | 36 --------
> .../media/platform/qcom/camss/camss-vfe-4-8.c | 31 -------
> .../media/platform/qcom/camss/camss-vfe-480.c | 36 --------
> drivers/media/platform/qcom/camss/camss-vfe.c | 77 ++++++++++++++++
> drivers/media/platform/qcom/camss/camss-vfe.h | 16 ++++
> drivers/media/platform/qcom/camss/camss.c | 87 ++++++++++++-------
> drivers/media/platform/qcom/camss/camss.h | 7 +-
> 9 files changed, 156 insertions(+), 178 deletions(-)
>
> --
> 2.42.0
>
> ---
> Bryan O'Donoghue (5):
> media: qcom: camss: Flag which VFEs require a power-domain
> media: qcom: camss: Convert to per-VFE pointer for power-domain linkages
> media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable
> media: qcom: camss: Move VFE power-domain specifics into vfe.c
> media: qcom: camss: Add support for named power-domains
>
> drivers/media/platform/qcom/camss/camss-vfe-170.c | 36 ----------
> drivers/media/platform/qcom/camss/camss-vfe-4-1.c | 8 +--
> drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 36 ----------
> drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 31 --------
> drivers/media/platform/qcom/camss/camss-vfe-480.c | 36 ----------
> drivers/media/platform/qcom/camss/camss-vfe.c | 79 ++++++++++++++++++++
> drivers/media/platform/qcom/camss/camss-vfe.h | 16 +++++
> drivers/media/platform/qcom/camss/camss.c | 87 ++++++++++++++---------
> drivers/media/platform/qcom/camss/camss.h | 7 +-
> 9 files changed, 158 insertions(+), 178 deletions(-)
> ---
> base-commit: 48016737a9af47328dd321df4dd3479ed5e2041d
> change-id: 20231031-b4-camss-named-power-domains-cc2ac2722543
>
> Best regards,
Tested the series using work in progress SC7280 CAMSS.
Power domain handling works correctly.
For the series:
Tested-by: Matti Lehtimäki <[email protected]>
On 01/11/2023 10:54, Bryan O'Donoghue wrote:
> + if (camss->genpd_num <= camss->res->vfe_num)
So based on code I saw in another series form Matti, I'm going to change
this LOC to something that counts has_pd.
I'll send an update for this series shortly once I've validate the change.
---
bod