linux-kernel - [PATCH 05/16] media: qcom: camss: csiphy-3ph: Move CSIPHY variables to data field inside csiphy struct

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Message-ID: <20241225133523.4034820-6-quic_depengs@quicinc.com>
Date: Wed, 25 Dec 2024 19:05:12 +0530
From: Depeng Shao <quic_depengs@...cinc.com>
To: <rfoss@...nel.org>, <todor.too@...il.com>, <bryan.odonoghue@...aro.org>,
        <mchehab@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <vladimir.zapolskiy@...aro.org>
CC: <quic_eberman@...cinc.com>, <quic_depengs@...cinc.com>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...cinc.com>
Subject: [PATCH 05/16] media: qcom: camss: csiphy-3ph: Move CSIPHY variables to data field inside csiphy struct

From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>

A .data field in the csiphy device structure allows us to extend out the
register layout of the three phase capable CSIPHY layer.

Move the existing lane configuration structure to an encapsulating
structure -> struct csiphy_device_regs which is derived from the .data
field populated at PHY init time, as opposed to calculated at lane
configuration.

Reviewed-by: default avatarVladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Signed-off-by: Depeng Shao <quic_depengs@...cinc.com>
---
 .../qcom/camss/camss-csiphy-3ph-1-0.c         | 54 ++++++++++---------
 .../media/platform/qcom/camss/camss-csiphy.h  |  6 +++
 2 files changed, 36 insertions(+), 24 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
index b283df7634bb..39cc7109ccf0 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
@@ -470,32 +470,10 @@ static void csiphy_gen1_config_lanes(struct csiphy_device *csiphy,
 static void csiphy_gen2_config_lanes(struct csiphy_device *csiphy,
 				     u8 settle_cnt)
 {
-	const struct csiphy_lane_regs *r;
-	int i, array_size;
+	const struct csiphy_lane_regs *r = csiphy->regs->lane_regs;
+	int i, array_size = csiphy->regs->lane_array_size;
 	u32 val;
 
-	switch (csiphy->camss->res->version) {
-	case CAMSS_7280:
-		r = &lane_regs_sm8250[0];
-		array_size = ARRAY_SIZE(lane_regs_sm8250);
-		break;
-	case CAMSS_8250:
-		r = &lane_regs_sm8250[0];
-		array_size = ARRAY_SIZE(lane_regs_sm8250);
-		break;
-	case CAMSS_8280XP:
-		r = &lane_regs_sc8280xp[0];
-		array_size = ARRAY_SIZE(lane_regs_sc8280xp);
-		break;
-	case CAMSS_845:
-		r = &lane_regs_sdm845[0];
-		array_size = ARRAY_SIZE(lane_regs_sdm845);
-		break;
-	default:
-		WARN(1, "unknown cspi version\n");
-		return;
-	}
-
 	for (i = 0; i < array_size; i++, r++) {
 		switch (r->csiphy_param_type) {
 		case CSIPHY_SETTLE_CNT_LOWER_BYTE:
@@ -588,6 +566,34 @@ static void csiphy_lanes_disable(struct csiphy_device *csiphy,
 
 static int csiphy_init(struct csiphy_device *csiphy)
 {
+	struct device *dev = csiphy->camss->dev;
+	struct csiphy_device_regs *regs;
+
+	regs = devm_kmalloc(dev, sizeof(*regs), GFP_KERNEL);
+	if (!regs)
+		return -ENOMEM;
+
+	csiphy->regs = regs;
+
+	switch (csiphy->camss->res->version) {
+	case CAMSS_845:
+		regs->lane_regs = &lane_regs_sdm845[0];
+		regs->lane_array_size = ARRAY_SIZE(lane_regs_sdm845);
+		break;
+	case CAMSS_7280:
+	case CAMSS_8250:
+		regs->lane_regs = &lane_regs_sm8250[0];
+		regs->lane_array_size = ARRAY_SIZE(lane_regs_sm8250);
+		break;
+	case CAMSS_8280XP:
+		regs->lane_regs = &lane_regs_sc8280xp[0];
+		regs->lane_array_size = ARRAY_SIZE(lane_regs_sc8280xp);
+		break;
+	default:
+		WARN(1, "unknown csiphy version\n");
+		return -ENODEV;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.h b/drivers/media/platform/qcom/camss/camss-csiphy.h
index 49393dfd5215..4d731597fed7 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy.h
+++ b/drivers/media/platform/qcom/camss/camss-csiphy.h
@@ -85,6 +85,11 @@ struct csiphy_subdev_resources {
 	const struct csiphy_formats *formats;
 };
 
+struct csiphy_device_regs {
+	const struct csiphy_lane_regs *lane_regs;
+	int lane_array_size;
+};
+
 struct csiphy_device {
 	struct camss *camss;
 	u8 id;
@@ -103,6 +108,7 @@ struct csiphy_device {
 	struct csiphy_config cfg;
 	struct v4l2_mbus_framefmt fmt[MSM_CSIPHY_PADS_NUM];
 	const struct csiphy_subdev_resources *res;
+	struct csiphy_device_regs *regs;
 };
 
 struct camss_subdev_resources;
-- 
2.34.1