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From:   Bryan O'Donoghue <bryan.odonoghue@linaro.org>
To:     hverkuil-cisco@xs4all.nl, laurent.pinchart@ideasonboard.com,
        rfoss@kernel.org, todor.too@gmail.com, agross@kernel.org,
        andersson@kernel.org, konrad.dybcio@linaro.org, mchehab@kernel.org
Cc:     linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Subject: [PATCH 2/4] media: qcom: camss: Use common VFE pm_domain_on/pm_domain_off where applicable
Date:   Tue, 24 Oct 2023 23:42:53 +0100
Message-ID: <20231024224255.754779-3-bryan.odonoghue@linaro.org>
In-Reply-To: <20231024224255.754779-1-bryan.odonoghue@linaro.org>
References: <20231024224255.754779-1-bryan.odonoghue@linaro.org>
MIME-Version: 1.0
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Precedence: bulk

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.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 .../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 | 32 -----------------
 .../media/platform/qcom/camss/camss-vfe-4-8.c | 29 ---------------
 .../media/platform/qcom/camss/camss-vfe-480.c | 36 -------------------
 drivers/media/platform/qcom/camss/camss-vfe.c | 34 ++++++++++++++++++
 drivers/media/platform/qcom/camss/camss-vfe.h | 12 +++++++
 7 files changed, 50 insertions(+), 137 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-vfe-170.c b/drivers/media/platform/qcom/camss/camss-vfe-170.c
index 59b0ea0aac48f..795ac3815339a 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-170.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-170.c
@@ -627,42 +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;
-	enum vfe_line_id id = vfe->id;
-
-	if (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 c668494ee1e98..7655d22a9fda2 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c
@@ -1103,38 +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;
-	enum vfe_line_id id = vfe->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) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", 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 5bd5b6b3c992a..f52fa30f3853e 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c
@@ -1093,35 +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;
-	enum vfe_line_id id = vfe->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) {
-		dev_err(vfe->camss->dev, "Failed to add VFE#%d to power domain\n", 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 ca16a7ebb2903..4652e8b4cff58 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe-480.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c
@@ -452,42 +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;
-	enum vfe_line_id id = vfe->id;
-
-	if (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 3d31f4289b724..fc3733baa668d 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_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;
+	enum vfe_line_id id = vfe->id;
+
+	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