linux-kernel - [PATCH v2 6/7] phy: rockchip: phy-rockchip-inno-csidphy: add support for rk3588 variant

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Message-Id: <20250616-rk3588-csi-dphy-v2-6-7a94f079b712@collabora.com>
Date: Tue, 19 Aug 2025 01:00:40 +0200
From: Michael Riesch via B4 Relay <devnull+michael.riesch.collabora.com@...nel.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Kever Yang <kever.yang@...k-chips.com>, 
 Jagan Teki <jagan@...rulasolutions.com>, 
 Sebastian Reichel <sebastian.reichel@...labora.com>, 
 Diederik de Haas <didi.debian@...ow.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Heiko Stuebner <heiko@...ech.de>, 
 Collabora Kernel Team <kernel@...labora.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-phy@...ts.infradead.org, 
 Michael Riesch <michael.riesch@...labora.com>
Subject: [PATCH v2 6/7] phy: rockchip: phy-rockchip-inno-csidphy: add
 support for rk3588 variant

From: Michael Riesch <michael.riesch@...labora.com>

The Rockchip RK3588 MIPI CSI-2 DPHY can be supported using the existing
phy-rockchip-inno-csidphy driver, the notable differences being
 - the control bits in the GRF
 - the additional reset line
Add support for this variant.

Signed-off-by: Michael Riesch <michael.riesch@...labora.com>
---
 drivers/phy/rockchip/phy-rockchip-inno-csidphy.c | 28 ++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c
index 6c4ddcd7e5de..c79fb53d8ee5 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c
@@ -30,6 +30,8 @@
 #define RK3568_GRF_VI_CON0		0x0340
 #define RK3568_GRF_VI_CON1		0x0344
 
+#define RK3588_CSIDPHY_GRF_CON0		0x0000
+
 /* PHY */
 #define CSIDPHY_CTRL_LANE_ENABLE		0x00
 #define CSIDPHY_CTRL_LANE_ENABLE_CK		BIT(6)
@@ -117,6 +119,12 @@ static const struct dphy_reg rk3568_grf_dphy_regs[] = {
 	[GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK3568_GRF_VI_CON0, 1, 8),
 };
 
+static const struct dphy_reg rk3588_grf_dphy_regs[] = {
+	[GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK3588_CSIDPHY_GRF_CON0, 4, 0),
+	[GRF_DPHY_CSIPHY_DATALANE_EN] = PHY_REG(RK3588_CSIDPHY_GRF_CON0, 4, 4),
+	[GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK3588_CSIDPHY_GRF_CON0, 1, 8),
+};
+
 struct hsfreq_range {
 	u32 range_h;
 	u8 cfg_bit;
@@ -183,6 +191,11 @@ static const char *const rk3368_reset_names[] = {
 	"apb"
 };
 
+static const char *const rk3588_reset_names[] = {
+	"apb",
+	"phy"
+};
+
 static void rockchip_inno_csidphy_ths_settle(struct rockchip_inno_csidphy *priv,
 					     int hsfreq, int offset)
 {
@@ -390,6 +403,17 @@ static const struct dphy_drv_data rk3568_mipidphy_drv_data = {
 	.resets_num = ARRAY_SIZE(rk3368_reset_names),
 };
 
+static const struct dphy_drv_data rk3588_mipidphy_drv_data = {
+	.pwrctl_offset = -1,
+	.ths_settle_offset = RK3568_CSIDPHY_CLK_WR_THS_SETTLE,
+	.calib_offset = RK3568_CSIDPHY_CLK_CALIB_EN,
+	.hsfreq_ranges = rk1808_mipidphy_hsfreq_ranges,
+	.num_hsfreq_ranges = ARRAY_SIZE(rk1808_mipidphy_hsfreq_ranges),
+	.grf_regs = rk3588_grf_dphy_regs,
+	.resets = rk3588_reset_names,
+	.resets_num = ARRAY_SIZE(rk3588_reset_names),
+};
+
 static const struct of_device_id rockchip_inno_csidphy_match_id[] = {
 	{
 		.compatible = "rockchip,px30-csi-dphy",
@@ -411,6 +435,10 @@ static const struct of_device_id rockchip_inno_csidphy_match_id[] = {
 		.compatible = "rockchip,rk3568-csi-dphy",
 		.data = &rk3568_mipidphy_drv_data,
 	},
+	{
+		.compatible = "rockchip,rk3588-csi-dphy",
+		.data = &rk3588_mipidphy_drv_data,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, rockchip_inno_csidphy_match_id);

-- 
2.39.5