diff mbox series

[3/3] media: rcar-csi2: Add support for C-PHY on R-Car V4H

Message ID 20230211145310.3819989-4-niklas.soderlund+renesas@ragnatech.se (mailing list archive)
State Superseded
Delegated to: Kieran Bingham
Headers show
Series media: rcar-csi2: Add support for V4H | expand

Commit Message

Niklas Söderlund Feb. 11, 2023, 2:53 p.m. UTC 
Add support for C-PHY on R-Car V4H. While the V4H supports both D-PHY
and C-PHY this patch only adds support for the C-PHY mode due to lack of
documentation and hardware to test on.

The V4H is the first Gen4 device that is enabled in the rcar-csi2
driver. There is much overlap with the Gen3 driver, the primary
difference is in how the receiver is started. The V4H have a much larger
register space and some addresses overlap with Gen3.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 .../platform/renesas/rcar-vin/rcar-csi2.c     | 288 ++++++++++++++++++
 1 file changed, 288 insertions(+)

Comments

Geert Uytterhoeven Feb. 13, 2023, 3:45 p.m. UTC | #1 
Hi Niklas,

On Sat, Feb 11, 2023 at 4:06 PM Niklas Söderlund
<niklas.soderlund+renesas@ragnatech.se> wrote:
> Add support for C-PHY on R-Car V4H. While the V4H supports both D-PHY
> and C-PHY this patch only adds support for the C-PHY mode due to lack of
> documentation and hardware to test on.
>
> The V4H is the first Gen4 device that is enabled in the rcar-csi2
> driver. There is much overlap with the Gen3 driver, the primary
> difference is in how the receiver is started. The V4H have a much larger
> register space and some addresses overlap with Gen3.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

Thanks for your patch!

> --- a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
> +++ b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c

> @@ -1503,6 +1781,12 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a779a0 = {
>         .support_dphy = true,
>  };
>
> +static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = {
> +       .start_receiver = rcsi2_start_receiver_v4h,

The description of "[PATCH 1/3] media: rcar-csi2: Prepare for Gen4
support" suggests you also need a different procedure for
.enter_standby()?  But perhaps not doing the procedure is just the right
thing to do?

> +       .use_isp = true,
> +       .support_cphy = true,
> +};
> +
>  static const struct of_device_id rcar_csi2_of_table[] = {
>         {
>                 .compatible = "renesas,r8a774a1-csi2",

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
Niklas Söderlund Feb. 13, 2023, 4:10 p.m. UTC | #2 
Hi Geert,

Thanks for your feedback.

On 2023-02-13 16:45:18 +0100, Geert Uytterhoeven wrote:
> Hi Niklas,
> 
> On Sat, Feb 11, 2023 at 4:06 PM Niklas Söderlund
> <niklas.soderlund+renesas@ragnatech.se> wrote:
> > Add support for C-PHY on R-Car V4H. While the V4H supports both D-PHY
> > and C-PHY this patch only adds support for the C-PHY mode due to lack of
> > documentation and hardware to test on.
> >
> > The V4H is the first Gen4 device that is enabled in the rcar-csi2
> > driver. There is much overlap with the Gen3 driver, the primary
> > difference is in how the receiver is started. The V4H have a much larger
> > register space and some addresses overlap with Gen3.
> >
> > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> 
> Thanks for your patch!
> 
> > --- a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
> > +++ b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
> 
> > @@ -1503,6 +1781,12 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a779a0 = {
> >         .support_dphy = true,
> >  };
> >
> > +static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = {
> > +       .start_receiver = rcsi2_start_receiver_v4h,
> 
> The description of "[PATCH 1/3] media: rcar-csi2: Prepare for Gen4
> support" suggests you also need a different procedure for
> .enter_standby()?  But perhaps not doing the procedure is just the right
> thing to do?

They are indeed different, but doing nothing in enter_standby() for V4H 
is the correct thing.

Maybe the function enter_standby(), could have been better named as 
enter_standby_extra() or pre_enter_standby(). As for both on Gen3 and 
V4H after enter_standby(), if present, have been called the rest 
controller is asserted and the module is powers off.

Only that on Gen3 which have more documentation an extra step to poke 
some registers before asserting the reset controller is documented, so 
this is what happens in rcsi2_enter_standby_gen3(). I would not be 
surprised as we get more documentation for V4H we will add a 
rcsi2_enter_standby_gen4() to match updates in the datasheet.


> 
> > +       .use_isp = true,
> > +       .support_cphy = true,
> > +};
> > +
> >  static const struct of_device_id rcar_csi2_of_table[] = {
> >         {
> >                 .compatible = "renesas,r8a774a1-csi2",
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
diff mbox series

Patch

diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
index 5fa4a29064fd..667e24a78087 100644
--- a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c
@@ -133,6 +133,111 @@  struct rcar_csi2;
 #define PHYFRX_FORCERX_MODE_1		BIT(1)
 #define PHYFRX_FORCERX_MODE_0		BIT(0)
 
+/* V4H BASE registers */
+#define V4H_N_LANES_REG					0x0004
+#define V4H_CSI2_RESETN_REG				0x0008
+#define V4H_PHY_MODE_REG				0x001c
+#define V4H_PHY_SHUTDOWNZ_REG				0x0040
+#define V4H_DPHY_RSTZ_REG				0x0044
+#define V4H_FLDC_REG					0x0804
+#define V4H_FLDD_REG					0x0808
+#define V4H_IDIC_REG					0x0810
+#define V4H_PHY_EN_REG					0x2000
+
+#define V4H_ST_PHYST_REG				0x2814
+#define V4H_ST_PHYST_ST_PHY_READY			BIT(31)
+#define V4H_ST_PHYST_ST_STOPSTATE_3			BIT(3)
+#define V4H_ST_PHYST_ST_STOPSTATE_2			BIT(2)
+#define V4H_ST_PHYST_ST_STOPSTATE_1			BIT(1)
+#define V4H_ST_PHYST_ST_STOPSTATE_0			BIT(0)
+
+/* V4H PPI registers */
+#define V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(n)		(0x21800 + ((n) * 2)) /* n = 0 - 9 */
+#define V4H_PPI_STARTUP_RW_COMMON_STARTUP_1_1_REG	0x21822
+#define V4H_PPI_CALIBCTRL_RW_COMMON_BG_0_REG		0x2184c
+#define V4H_PPI_RW_LPDCOCAL_TIMEBASE_REG		0x21c02
+#define V4H_PPI_RW_LPDCOCAL_NREF_REG			0x21c04
+#define V4H_PPI_RW_LPDCOCAL_NREF_RANGE_REG		0x21c06
+#define V4H_PPI_RW_LPDCOCAL_TWAIT_CONFIG_REG		0x21c0a
+#define V4H_PPI_RW_LPDCOCAL_VT_CONFIG_REG		0x21c0c
+#define V4H_PPI_RW_LPDCOCAL_COARSE_CFG_REG		0x21c10
+#define V4H_PPI_RW_COMMON_CFG_REG			0x21c6c
+#define V4H_PPI_RW_TERMCAL_CFG_0_REG			0x21c80
+#define V4H_PPI_RW_OFFSETCAL_CFG_0_REG			0x21ca0
+
+/* V4H CORE registers */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_LANE0_CTRL_2_REG(n)	(0x22040 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_LANE1_CTRL_2_REG(n)	(0x22440 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_LANE2_CTRL_2_REG(n)	(0x22840 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_LANE3_CTRL_2_REG(n)	(0x22c40 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_LANE4_CTRL_2_REG(n)	(0x23040 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_IOCTRL_RW_AFE_CB_CTRL_2_REG(n)	(0x23840 + ((n) * 2)) /* n = 0 - 11 */
+#define V4H_CORE_DIG_RW_COMMON_REG(n)			(0x23880 + ((n) * 2)) /* n = 0 - 15 */
+#define V4H_CORE_DIG_ANACTRL_RW_COMMON_ANACTRL_REG(n)	(0x239e0 + ((n) * 2)) /* n = 0 - 3 */
+#define V4H_CORE_DIG_CLANE_1_RW_CFG_0_REG		0x2a400
+#define V4H_CORE_DIG_CLANE_1_RW_HS_TX_6_REG		0x2a60c
+
+/* V4H C-PHY */
+#define V4H_CORE_DIG_RW_TRIO0_REG(n)			(0x22100 + ((n) * 2)) /* n = 0 - 3 */
+#define V4H_CORE_DIG_RW_TRIO1_REG(n)			(0x22500 + ((n) * 2)) /* n = 0 - 3 */
+#define V4H_CORE_DIG_RW_TRIO2_REG(n)			(0x22900 + ((n) * 2)) /* n = 0 - 3 */
+#define V4H_CORE_DIG_CLANE_0_RW_LP_0_REG		0x2a080
+#define V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(n)		(0x2a100 + ((n) * 2)) /* n = 0 - 6 */
+#define V4H_CORE_DIG_CLANE_1_RW_LP_0_REG		0x2a480
+#define V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(n)		(0x2a500 + ((n) * 2)) /* n = 0 - 6 */
+#define V4H_CORE_DIG_CLANE_2_RW_LP_0_REG		0x2a880
+#define V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(n)		(0x2a900 + ((n) * 2)) /* n = 0 - 6 */
+
+struct rcsi2_cphy_setting {
+	u16 msps;
+	u16 rx2;
+	u16 trio0;
+	u16 trio1;
+	u16 trio2;
+	u16 lane27;
+	u16 lane29;
+};
+
+static const struct rcsi2_cphy_setting cphy_setting_table_r8a779g0[] = {
+	{ .msps =   80, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0134, .trio2 = 0x6a, .lane27 = 0x0000, .lane29 = 0x0a24 },
+	{ .msps =  100, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x00f5, .trio2 = 0x55, .lane27 = 0x0000, .lane29 = 0x0a24 },
+	{ .msps =  200, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0077, .trio2 = 0x2b, .lane27 = 0x0000, .lane29 = 0x0a44 },
+	{ .msps =  300, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x004d, .trio2 = 0x1d, .lane27 = 0x0000, .lane29 = 0x0a44 },
+	{ .msps =  400, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0038, .trio2 = 0x16, .lane27 = 0x0000, .lane29 = 0x0a64 },
+	{ .msps =  500, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x002b, .trio2 = 0x12, .lane27 = 0x0000, .lane29 = 0x0a64 },
+	{ .msps =  600, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0023, .trio2 = 0x0f, .lane27 = 0x0000, .lane29 = 0x0a64 },
+	{ .msps =  700, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x001d, .trio2 = 0x0d, .lane27 = 0x0000, .lane29 = 0x0a84 },
+	{ .msps =  800, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0018, .trio2 = 0x0c, .lane27 = 0x0000, .lane29 = 0x0a84 },
+	{ .msps =  900, .rx2 = 0x38, .trio0 = 0x024a, .trio1 = 0x0015, .trio2 = 0x0b, .lane27 = 0x0000, .lane29 = 0x0a84 },
+	{ .msps = 1000, .rx2 = 0x3e, .trio0 = 0x024a, .trio1 = 0x0012, .trio2 = 0x0a, .lane27 = 0x0400, .lane29 = 0x0a84 },
+	{ .msps = 1100, .rx2 = 0x44, .trio0 = 0x024a, .trio1 = 0x000f, .trio2 = 0x09, .lane27 = 0x0800, .lane29 = 0x0a84 },
+	{ .msps = 1200, .rx2 = 0x4a, .trio0 = 0x024a, .trio1 = 0x000e, .trio2 = 0x08, .lane27 = 0x0c00, .lane29 = 0x0a84 },
+	{ .msps = 1300, .rx2 = 0x51, .trio0 = 0x024a, .trio1 = 0x000c, .trio2 = 0x08, .lane27 = 0x0c00, .lane29 = 0x0aa4 },
+	{ .msps = 1400, .rx2 = 0x57, .trio0 = 0x024a, .trio1 = 0x000b, .trio2 = 0x07, .lane27 = 0x1000, .lane29 = 0x0aa4 },
+	{ .msps = 1500, .rx2 = 0x5d, .trio0 = 0x044a, .trio1 = 0x0009, .trio2 = 0x07, .lane27 = 0x1000, .lane29 = 0x0aa4 },
+	{ .msps = 1600, .rx2 = 0x63, .trio0 = 0x044a, .trio1 = 0x0008, .trio2 = 0x07, .lane27 = 0x1400, .lane29 = 0x0aa4 },
+	{ .msps = 1700, .rx2 = 0x6a, .trio0 = 0x044a, .trio1 = 0x0007, .trio2 = 0x06, .lane27 = 0x1400, .lane29 = 0x0aa4 },
+	{ .msps = 1800, .rx2 = 0x70, .trio0 = 0x044a, .trio1 = 0x0007, .trio2 = 0x06, .lane27 = 0x1400, .lane29 = 0x0aa4 },
+	{ .msps = 1900, .rx2 = 0x76, .trio0 = 0x044a, .trio1 = 0x0006, .trio2 = 0x06, .lane27 = 0x1400, .lane29 = 0x0aa4 },
+	{ .msps = 2000, .rx2 = 0x7c, .trio0 = 0x044a, .trio1 = 0x0005, .trio2 = 0x06, .lane27 = 0x1800, .lane29 = 0x0aa4 },
+	{ .msps = 2100, .rx2 = 0x83, .trio0 = 0x044a, .trio1 = 0x0005, .trio2 = 0x05, .lane27 = 0x1800, .lane29 = 0x0aa4 },
+	{ .msps = 2200, .rx2 = 0x89, .trio0 = 0x064a, .trio1 = 0x0004, .trio2 = 0x05, .lane27 = 0x1800, .lane29 = 0x0aa4 },
+	{ .msps = 2300, .rx2 = 0x8f, .trio0 = 0x064a, .trio1 = 0x0003, .trio2 = 0x05, .lane27 = 0x1800, .lane29 = 0x0aa4 },
+	{ .msps = 2400, .rx2 = 0x95, .trio0 = 0x064a, .trio1 = 0x0003, .trio2 = 0x05, .lane27 = 0x1800, .lane29 = 0x0aa4 },
+	{ .msps = 2500, .rx2 = 0x9c, .trio0 = 0x064a, .trio1 = 0x0003, .trio2 = 0x05, .lane27 = 0x1c00, .lane29 = 0x0aa4 },
+	{ .msps = 2600, .rx2 = 0xa2, .trio0 = 0x064a, .trio1 = 0x0002, .trio2 = 0x05, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 2700, .rx2 = 0xa8, .trio0 = 0x064a, .trio1 = 0x0002, .trio2 = 0x05, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 2800, .rx2 = 0xae, .trio0 = 0x064a, .trio1 = 0x0002, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 2900, .rx2 = 0xb5, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3000, .rx2 = 0xbb, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3100, .rx2 = 0xc1, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3200, .rx2 = 0xc7, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3300, .rx2 = 0xce, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3400, .rx2 = 0xd4, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ .msps = 3500, .rx2 = 0xda, .trio0 = 0x084a, .trio1 = 0x0001, .trio2 = 0x04, .lane27 = 0x1c00, .lane29 = 0x0ad4 },
+	{ /* sentinel */ },
+};
+
 struct phtw_value {
 	u16 data;
 	u16 code;
@@ -538,6 +643,11 @@  static void rcsi2_write(struct rcar_csi2 *priv, unsigned int reg, u32 data)
 	iowrite32(data, priv->base + reg);
 }
 
+static void rcsi2_write16(struct rcar_csi2 *priv, unsigned int reg, u16 data)
+{
+	iowrite16(data, priv->base + reg);
+}
+
 static void rcsi2_enter_standby_gen3(struct rcar_csi2 *priv)
 {
 	rcsi2_write(priv, PHYCNT_REG, 0);
@@ -645,6 +755,10 @@  static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp,
 	mbps = v4l2_ctrl_g_ctrl_int64(ctrl) * bpp;
 	do_div(mbps, lanes * 1000000);
 
+	/* Adjust for C-PHY */
+	if (priv->cphy)
+		do_div(mbps, 2.8);
+
 	return mbps;
 }
 
@@ -833,6 +947,170 @@  static int rcsi2_start_receiver_gen3(struct rcar_csi2 *priv)
 	return 0;
 }
 
+static int rcsi2_wait_phy_start_v4h(struct rcar_csi2 *priv, u32 match)
+{
+	unsigned int timeout;
+	u32 status;
+
+	for (timeout = 0; timeout <= 10; timeout++) {
+		status = rcsi2_read(priv, V4H_ST_PHYST_REG);
+		if ((status & match) == match)
+			return 0;
+
+		usleep_range(1000, 2000);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int rcsi2_c_phy_setting_v4h(struct rcar_csi2 *priv, int msps)
+{
+	const struct rcsi2_cphy_setting *conf;
+
+	for (conf = cphy_setting_table_r8a779g0; conf->msps != 0; conf++) {
+		if (conf->msps > msps)
+			break;
+	}
+
+	if (!conf->msps) {
+		dev_err(priv->dev, "Unsupported PHY speed for msps setting (%u Msps)", msps);
+		return -ERANGE;
+	}
+
+	/* C-PHY specific */
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_COMMON_REG(7), 0x0155);
+	rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(7), 0x0068);
+	rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(8), 0x0010);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_LP_0_REG, 0x463c);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_LP_0_REG, 0x463c);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_LP_0_REG, 0x463c);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(0), 0x00d5);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(0), 0x00d5);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(0), 0x00d5);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(1), 0x0013);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(1), 0x0013);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(1), 0x0013);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(5), 0x0013);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(5), 0x0013);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(5), 0x0013);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(6), 0x000a);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(6), 0x000a);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(6), 0x000a);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_0_RW_HS_RX_REG(2), conf->rx2);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_RX_REG(2), conf->rx2);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_2_RW_HS_RX_REG(2), conf->rx2);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE0_CTRL_2_REG(2), 0x0001);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE1_CTRL_2_REG(2), 0);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE2_CTRL_2_REG(2), 0x0001);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE3_CTRL_2_REG(2), 0x0001);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE4_CTRL_2_REG(2), 0);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO0_REG(0), conf->trio0);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO1_REG(0), conf->trio0);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO2_REG(0), conf->trio0);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO0_REG(2), conf->trio2);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO1_REG(2), conf->trio2);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO2_REG(2), conf->trio2);
+
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO0_REG(1), conf->trio1);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO1_REG(1), conf->trio1);
+	rcsi2_write16(priv, V4H_CORE_DIG_RW_TRIO2_REG(1), conf->trio1);
+
+	/*
+	 * Configure pin-swap.
+	 * TODO: This registers is not documented yet, the values should depend
+	 * on the 'clock-lanes' and 'data-lanes' devicetree properties.
+	 */
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_CFG_0_REG, 0xf5);
+	rcsi2_write16(priv, V4H_CORE_DIG_CLANE_1_RW_HS_TX_6_REG, 0x5000);
+
+	/* Leave Shutdown mode */
+	rcsi2_write(priv, V4H_DPHY_RSTZ_REG, BIT(0));
+	rcsi2_write(priv, V4H_PHY_SHUTDOWNZ_REG, BIT(0));
+
+	/* Wait for calibration */
+	if (rcsi2_wait_phy_start_v4h(priv, V4H_ST_PHYST_ST_PHY_READY)) {
+		dev_err(priv->dev, "PHY calibration failed\n");
+		return -ETIMEDOUT;
+	}
+
+	/* C-PHY setting - analog programing*/
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE0_CTRL_2_REG(9), conf->lane29);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANE0_CTRL_2_REG(7), conf->lane27);
+
+	return 0;
+}
+
+static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv)
+{
+	const struct rcar_csi2_format *format;
+	unsigned int msps, lanes;
+	int ret;
+
+	/* Calculate parameters */
+	format = rcsi2_code_to_fmt(priv->mf.code);
+
+	ret = rcsi2_get_active_lanes(priv, &lanes);
+	if (ret)
+		return ret;
+
+	msps = rcsi2_calc_mbps(priv, format->bpp, lanes);
+	if (msps < 0)
+		return msps;
+
+	/* Reset LINK and PHY*/
+	rcsi2_write(priv, V4H_CSI2_RESETN_REG, 0);
+	rcsi2_write(priv, V4H_DPHY_RSTZ_REG, 0);
+	rcsi2_write(priv, V4H_PHY_SHUTDOWNZ_REG, 0);
+
+	/* PHY static setting */
+	rcsi2_write(priv, V4H_PHY_EN_REG, BIT(0));
+	rcsi2_write(priv, V4H_FLDC_REG, 0);
+	rcsi2_write(priv, V4H_FLDD_REG, 0);
+	rcsi2_write(priv, V4H_IDIC_REG, 0);
+	rcsi2_write(priv, V4H_PHY_MODE_REG, BIT(0));
+	rcsi2_write(priv, V4H_N_LANES_REG, lanes - 1);
+
+	/* Reset CSI2 */
+	rcsi2_write(priv, V4H_CSI2_RESETN_REG, BIT(0));
+
+	/* Registers static setting through APB */
+	/* Common setting */
+	rcsi2_write16(priv, V4H_CORE_DIG_ANACTRL_RW_COMMON_ANACTRL_REG(0), 0x1bfd);
+	rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_STARTUP_1_1_REG, 0x0233);
+	rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(6), 0x0027);
+	rcsi2_write16(priv, V4H_PPI_CALIBCTRL_RW_COMMON_BG_0_REG, 0x01f4);
+	rcsi2_write16(priv, V4H_PPI_RW_TERMCAL_CFG_0_REG, 0x0013);
+	rcsi2_write16(priv, V4H_PPI_RW_OFFSETCAL_CFG_0_REG, 0x0003);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_TIMEBASE_REG, 0x004f);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_NREF_REG, 0x0320);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_NREF_RANGE_REG, 0x000f);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_TWAIT_CONFIG_REG, 0xfe18);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_VT_CONFIG_REG, 0x0c3c);
+	rcsi2_write16(priv, V4H_PPI_RW_LPDCOCAL_COARSE_CFG_REG, 0x0105);
+	rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_CB_CTRL_2_REG(6), 0x1000);
+	rcsi2_write16(priv, V4H_PPI_RW_COMMON_CFG_REG, 0x0003);
+
+	/* C-PHY settings */
+	ret = rcsi2_c_phy_setting_v4h(priv, msps);
+	if (ret)
+		return ret;
+
+	rcsi2_wait_phy_start_v4h(priv, V4H_ST_PHYST_ST_STOPSTATE_0 |
+				 V4H_ST_PHYST_ST_STOPSTATE_1 |
+				 V4H_ST_PHYST_ST_STOPSTATE_2);
+
+	return 0;
+}
+
 static int rcsi2_start(struct rcar_csi2 *priv)
 {
 	int ret;
@@ -1503,6 +1781,12 @@  static const struct rcar_csi2_info rcar_csi2_info_r8a779a0 = {
 	.support_dphy = true,
 };
 
+static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = {
+	.start_receiver = rcsi2_start_receiver_v4h,
+	.use_isp = true,
+	.support_cphy = true,
+};
+
 static const struct of_device_id rcar_csi2_of_table[] = {
 	{
 		.compatible = "renesas,r8a774a1-csi2",
@@ -1552,6 +1836,10 @@  static const struct of_device_id rcar_csi2_of_table[] = {
 		.compatible = "renesas,r8a779a0-csi2",
 		.data = &rcar_csi2_info_r8a779a0,
 	},
+	{
+		.compatible = "renesas,r8a779g0-csi2",
+		.data = &rcar_csi2_info_r8a779g0,
+	},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, rcar_csi2_of_table);