On Thu Jun 12 19:59:04 2025 +0200, Niklas Söderlund wrote: > Add D-PHY support for V4H in addition to the already supported C-PHY. > The common start-up procedure for C-PHY and D-PHY is shared, only PHY > setup differ. Extend the V4H setup with D-PHY support as documented in > the datasheet (Rev.1.21). > > Most of the start-up procedure is only documented as magic values in > tables, there is little documentation to make the settings more clear. > Wherever possible formulas or lookup tables are used as they are > documented in the datasheet. > > Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se> > Tested-by: Tomi Valkeinen <tomi.valkeinen+rene...@ideasonboard.com> > Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com> > Link: > https://lore.kernel.org/r/20250612175904.1126717-5-niklas.soderlund+rene...@ragnatech.se > Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com> > Signed-off-by: Hans Verkuil <hverk...@xs4all.nl>
Patch committed. Thanks, Hans Verkuil drivers/media/platform/renesas/rcar-csi2.c | 230 +++++++++++++++++++++++++++-- 1 file changed, 220 insertions(+), 10 deletions(-) --- diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c index 7ba637d8683b..0350eb76df36 100644 --- a/drivers/media/platform/renesas/rcar-csi2.c +++ b/drivers/media/platform/renesas/rcar-csi2.c @@ -172,6 +172,7 @@ struct rcar_csi2; #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_DDLCAL_CFG_n_REG(n) (0x21c40 + ((n) * 2)) /* n = 0 - 7 */ #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 @@ -185,6 +186,13 @@ struct rcar_csi2; #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_COMMON_RW_DESKEW_FINE_MEM_REG 0x23fe0 + +#define V4H_CORE_DIG_DLANE_l_RW_CFG_n_REG(l, n) (0x26000 + ((l) * 0x400) + ((n) * 2)) +#define V4H_CORE_DIG_DLANE_l_RW_LP_n_REG(l, n) (0x26080 + ((l) * 0x400) + ((n) * 2)) +#define V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, n) (0x26100 + ((l) * 0x400) + ((n) * 2)) +#define V4H_CORE_DIG_DLANE_CLK_RW_LP_n_REG(n) V4H_CORE_DIG_DLANE_l_RW_LP_n_REG(4, (n)) +#define V4H_CORE_DIG_DLANE_CLK_RW_HS_RX_n_REG(n) V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(4, (n)) /* V4H C-PHY */ #define V4H_CORE_DIG_RW_TRIO0_REG(n) (0x22100 + ((n) * 2)) /* n = 0 - 3 */ @@ -1282,11 +1290,193 @@ rcsi2_c_phy_setting_v4h(struct rcar_csi2 *priv, int mbps) return conf; } +struct rcsi2_d_phy_setting_v4h_lut_value { + unsigned int mbps; + unsigned char cfg_1; + unsigned char cfg_5_94; + unsigned char cfg_5_30; + unsigned char lane_ctrl_2_8; + unsigned char rw_hs_rx_3_83; + unsigned char rw_hs_rx_3_20; + unsigned char rw_hs_rx_6; + unsigned char rw_hs_rx_1; +}; + +static const struct rcsi2_d_phy_setting_v4h_lut_value * +rcsi2_d_phy_setting_v4h_lut_lookup(int mbps) +{ + static const struct rcsi2_d_phy_setting_v4h_lut_value values[] = { + { 4500, 0x3f, 0x07, 0x00, 0x01, 0x02, 0x01, 0x0d, 0x10 }, + { 4000, 0x47, 0x08, 0x01, 0x01, 0x05, 0x01, 0x0f, 0x0d }, + { 3600, 0x4f, 0x09, 0x01, 0x01, 0x06, 0x01, 0x10, 0x0b }, + { 3230, 0x57, 0x0a, 0x01, 0x01, 0x06, 0x01, 0x12, 0x09 }, + { 3000, 0x47, 0x08, 0x00, 0x00, 0x03, 0x01, 0x0f, 0x0c }, + { 2700, 0x4f, 0x09, 0x01, 0x00, 0x06, 0x01, 0x10, 0x0b }, + { 2455, 0x57, 0x0a, 0x01, 0x00, 0x06, 0x01, 0x12, 0x09 }, + { 2250, 0x5f, 0x0b, 0x01, 0x00, 0x08, 0x01, 0x13, 0x08 }, + { 2077, 0x67, 0x0c, 0x01, 0x00, 0x06, 0x02, 0x15, 0x0d }, + { 1929, 0x6f, 0x0d, 0x02, 0x00, 0x06, 0x02, 0x17, 0x0d }, + { 1800, 0x77, 0x0e, 0x02, 0x00, 0x06, 0x02, 0x18, 0x0d }, + { 1688, 0x7f, 0x0f, 0x02, 0x00, 0x08, 0x02, 0x1a, 0x0d }, + { 1588, 0x87, 0x10, 0x02, 0x00, 0x08, 0x02, 0x1b, 0x0d }, + { 1500, 0x8f, 0x11, 0x03, 0x00, 0x08, 0x02, 0x1d, 0x0c }, + }; + + for (unsigned int i = 0; i < ARRAY_SIZE(values); i++) + if (mbps >= values[i].mbps) + return &values[i]; + + return NULL; +} + +static int rcsi2_d_phy_setting_v4h(struct rcar_csi2 *priv, int mbps) +{ + const struct rcsi2_d_phy_setting_v4h_lut_value *lut = + rcsi2_d_phy_setting_v4h_lut_lookup(mbps); + u16 val; + + rcsi2_write16(priv, V4H_CORE_DIG_RW_COMMON_REG(7), 0x0000); + rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(7), mbps > 1500 ? 0x0028 : 0x0068); + rcsi2_write16(priv, V4H_PPI_STARTUP_RW_COMMON_DPHY_REG(8), 0x0050); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(0), 0x0063); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(7), 0x1132); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(1), 0x1340); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(2), 0x4b13); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(4), 0x000a); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(6), 0x800a); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(7), 0x1109); + + if (mbps > 1500) { + val = DIV_ROUND_UP(5 * mbps, 64); + rcsi2_write16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(3), val); + } + + if (lut) { + rcsi2_modify16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(1), + lut->cfg_1, 0x00ff); + rcsi2_modify16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(5), + lut->cfg_5_94 << 4, 0x03f0); + rcsi2_modify16(priv, V4H_PPI_RW_DDLCAL_CFG_n_REG(5), + lut->cfg_5_30 << 0, 0x000f); + + for (unsigned int l = 0; l < 5; l++) + rcsi2_modify16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 8), + lut->lane_ctrl_2_8 << 12, 0x1000); + } + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_LP_n_REG(l, 0), 0x463c); + + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(0, 2), 0x0000); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(1, 2), 0x0000); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(2, 2), 0x0001); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(3, 2), 0x0000); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(4, 2), 0x0000); + + rcsi2_write16(priv, V4H_CORE_DIG_RW_COMMON_REG(6), 0x0009); + + val = mbps > 1500 ? 0x0800 : 0x0802; + for (unsigned int l = 0; l < 5; l++) + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 12), val); + + val = mbps > 1500 ? 0x0000 : 0x0002; + for (unsigned int l = 0; l < 5; l++) + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 13), val); + + if (mbps >= 80) { + /* 2560: 6, 1280: 5, 640: 4, 320: 3, 160: 2, 80: 1 */ + val = ilog2(mbps / 80) + 1; + rcsi2_modify16(priv, + V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(2, 9), + val << 5, 0xe0); + } + + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_CLK_RW_HS_RX_n_REG(0), 0x091c); + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_CLK_RW_HS_RX_n_REG(7), 0x3b06); + + val = DIV_ROUND_UP(1200, mbps) + 12; + for (unsigned int l = 0; l < 4; l++) + rcsi2_modify16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 0), val << 8, 0xf0); + + val = mbps > 1500 ? 0x0004 : 0x0008; + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_CFG_n_REG(l, 1), val); + + val = mbps > 2500 ? 0x669a : mbps > 1500 ? 0xe69a : 0xe69b; + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 2), val); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_LP_n_REG(l, 0), 0x163c); + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_CLK_RW_LP_n_REG(0), 0x163c); + + if (lut) { + for (unsigned int l = 0; l < 4; l++) + rcsi2_modify16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 1), + lut->rw_hs_rx_1, 0xff); + } + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 3), 0x9209); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 4), 0x0096); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 5), 0x0100); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 6), 0x2d02); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_write16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 7), 0x1b06); + + if (lut) { + /* + * Documentation LUT have two values but document writing both + * values in a single write. + */ + for (unsigned int l = 0; l < 4; l++) + rcsi2_modify16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 3), + lut->rw_hs_rx_3_83 << 3 | lut->rw_hs_rx_3_20, 0x1ff); + + for (unsigned int l = 0; l < 4; l++) + rcsi2_modify16(priv, V4H_CORE_DIG_DLANE_l_RW_HS_RX_n_REG(l, 6), + lut->rw_hs_rx_6 << 8, 0xff00); + } + + static const u16 deskew_fine[] = { + 0x0404, 0x040c, 0x0414, 0x041c, 0x0423, 0x0429, 0x0430, 0x043a, + 0x0445, 0x044a, 0x0450, 0x045a, 0x0465, 0x0469, 0x0472, 0x047a, + 0x0485, 0x0489, 0x0490, 0x049a, 0x04a4, 0x04ac, 0x04b4, 0x04bc, + 0x04c4, 0x04cc, 0x04d4, 0x04dc, 0x04e4, 0x04ec, 0x04f4, 0x04fc, + 0x0504, 0x050c, 0x0514, 0x051c, 0x0523, 0x0529, 0x0530, 0x053a, + 0x0545, 0x054a, 0x0550, 0x055a, 0x0565, 0x0569, 0x0572, 0x057a, + 0x0585, 0x0589, 0x0590, 0x059a, 0x05a4, 0x05ac, 0x05b4, 0x05bc, + 0x05c4, 0x05cc, 0x05d4, 0x05dc, 0x05e4, 0x05ec, 0x05f4, 0x05fc, + 0x0604, 0x060c, 0x0614, 0x061c, 0x0623, 0x0629, 0x0632, 0x063a, + 0x0645, 0x064a, 0x0650, 0x065a, 0x0665, 0x0669, 0x0672, 0x067a, + 0x0685, 0x0689, 0x0690, 0x069a, 0x06a4, 0x06ac, 0x06b4, 0x06bc, + 0x06c4, 0x06cc, 0x06d4, 0x06dc, 0x06e4, 0x06ec, 0x06f4, 0x06fc, + 0x0704, 0x070c, 0x0714, 0x071c, 0x0723, 0x072a, 0x0730, 0x073a, + 0x0745, 0x074a, 0x0750, 0x075a, 0x0765, 0x0769, 0x0772, 0x077a, + 0x0785, 0x0789, 0x0790, 0x079a, 0x07a4, 0x07ac, 0x07b4, 0x07bc, + 0x07c4, 0x07cc, 0x07d4, 0x07dc, 0x07e4, 0x07ec, 0x07f4, 0x07fc, + }; + + for (unsigned int i = 0; i < ARRAY_SIZE(deskew_fine); i++) { + rcsi2_write16(priv, V4H_CORE_DIG_COMMON_RW_DESKEW_FINE_MEM_REG, + deskew_fine[i]); + } + + return 0; +} + static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv, struct v4l2_subdev_state *state) { + const struct rcsi2_cphy_setting *cphy = NULL; const struct rcar_csi2_format *format; - const struct rcsi2_cphy_setting *cphy; const struct v4l2_mbus_framefmt *fmt; unsigned int lanes; int mbps; @@ -1318,7 +1508,8 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv, 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, V4H_PHY_MODE_CPHY); + rcsi2_write(priv, V4H_PHY_MODE_REG, + priv->cphy ? V4H_PHY_MODE_CPHY : V4H_PHY_MODE_DPHY); rcsi2_write(priv, V4H_N_LANES_REG, lanes - 1); rcsi2_write(priv, V4M_FRXM_REG, @@ -1361,9 +1552,15 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv, rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_CB_CTRL_2_REG(5), 0x4000); /* T3: PHY settings */ - cphy = rcsi2_c_phy_setting_v4h(priv, mbps); - if (!cphy) - return -ERANGE; + if (priv->cphy) { + cphy = rcsi2_c_phy_setting_v4h(priv, mbps); + if (!cphy) + return -ERANGE; + } else { + ret = rcsi2_d_phy_setting_v4h(priv, mbps); + if (ret) + return ret; + } /* T4: Leave Shutdown mode */ rcsi2_write(priv, V4H_DPHY_RSTZ_REG, BIT(0)); @@ -1376,11 +1573,23 @@ static int rcsi2_start_receiver_v4h(struct rcar_csi2 *priv, } /* T6: Analog programming */ - for (unsigned int l = 0; l < 3; l++) { - rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 9), - cphy->lane29); - rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 7), - cphy->lane27); + if (priv->cphy) { + for (unsigned int l = 0; l < 3; l++) { + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 9), + cphy->lane29); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 7), + cphy->lane27); + } + } else { + u16 val_2_9 = mbps > 2500 ? 0x14 : mbps > 1500 ? 0x04 : 0x00; + u16 val_2_15 = mbps > 1500 ? 0x03 : 0x00; + + for (unsigned int l = 0; l < 5; l++) { + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 9), + val_2_9); + rcsi2_write16(priv, V4H_CORE_DIG_IOCTRL_RW_AFE_LANEl_CTRL_2_REG(l, 15), + val_2_15); + } } /* T7: Wait for stop state */ @@ -2245,6 +2454,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = { .start_receiver = rcsi2_start_receiver_v4h, .use_isp = true, .support_cphy = true, + .support_dphy = true, }; static const struct rcsi2_register_layout rcsi2_registers_v4m = {