media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable

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 <konrad.dybcio@linaro.org>
Suggested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Tested-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

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 7451484317cc..795ac3815339 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -628,41 +628,6 @@ out_unlock:
 }
 
 /*
- * 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
  * @buf: Buffer to be enqueued
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 2911e4126e7a..ef6b34c915df 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 2b4e7e039407..7655d22a9fda 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 5e9534324130..f52fa30f3853 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 a70b8633bb3e..4652e8b4cff5 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -453,41 +453,6 @@ out_unlock:
 }
 
 /*
- * 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
  * @buf: Buffer to be enqueued
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 32a9cd32ffde..577afd16fdda 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 c1c50023d487..992a2103ec44 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;