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Implement sending these messages through the OCM. The code is largely based on the anx7411.c USB-C driver. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/bridge/analogix/anx7625.c | 68 +++++++++++++++++++++++++++= ++++ drivers/gpu/drm/bridge/analogix/anx7625.h | 12 ++++++ 2 files changed, 80 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/br= idge/analogix/anx7625.c index 8dc6e3b16968..c43519097a45 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1484,6 +1484,73 @@ static void anx7625_start_dp_work(struct anx7625_dat= a *ctx) } =20 #if IS_REACHABLE(CONFIG_TYPEC) +static u8 anx7625_checksum(u8 *buf, u8 len) +{ + u8 ret =3D 0; + u8 i; + + for (i =3D 0; i < len; i++) + ret +=3D buf[i]; + + return ret; +} + +static int anx7625_read_msg_ctrl_status(struct anx7625_data *ctx) +{ + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, CMD_SEND_BUF); +} + +static int anx7625_wait_msg_empty(struct anx7625_data *ctx) +{ + int val; + + return readx_poll_timeout(anx7625_read_msg_ctrl_status, ctx, + val, (val < 0) || (val =3D=3D 0), + 2000, 2000 * 150); +} + +static int anx7625_send_msg(struct anx7625_data *ctx, u8 type, u8 *buf, u8= size) +{ + struct fw_msg *msg =3D &ctx->send_msg; + u8 crc; + int ret; + + size =3D min_t(u8, size, (u8)MAX_BUF_LEN); + memcpy(msg->buf, buf, size); + msg->msg_type =3D type; + + /* msg len equals buffer length + msg_type */ + msg->msg_len =3D size + 1; + + crc =3D anx7625_checksum((u8 *)msg, size + HEADER_LEN); + msg->buf[size] =3D 0 - crc; + + ret =3D anx7625_wait_msg_empty(ctx); + if (ret) + return ret; + + ret =3D anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, + CMD_SEND_BUF + 1, size + HEADER_LEN, + &msg->msg_type); + ret |=3D anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, CMD_SEND_BUF, + msg->msg_len); + return ret; +} + +static int anx7625_typec_dr_set(struct typec_port *port, enum typec_data_r= ole role) +{ + struct anx7625_data *ctx =3D typec_get_drvdata(port); + + if (role =3D=3D ctx->typec_data_role) + return 0; + + return anx7625_send_msg(ctx, 0x11, NULL, 0); +} + +static const struct typec_operations anx7625_typec_ops =3D { + .dr_set =3D anx7625_typec_dr_set, +}; + static void anx7625_typec_set_orientation(struct anx7625_data *ctx) { u32 val =3D anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS); @@ -1542,6 +1609,7 @@ static int anx7625_typec_register(struct anx7625_data= *ctx) typec_cap.orientation_aware =3D true; =20 typec_cap.driver_data =3D ctx; + typec_cap.ops =3D &anx7625_typec_ops; =20 ctx->typec_port =3D typec_register_port(ctx->dev, &typec_cap); if (IS_ERR(ctx->typec_port)) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/br= idge/analogix/anx7625.h index a18561c213af..957d234ec07c 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -67,6 +67,9 @@ #define CC2_RA BIT(5) #define CC2_RP (BIT(6) | BIT(7)) =20 +#define CMD_SEND_BUF 0xC0 +#define CMD_RECV_BUF 0xE0 + /******** END of I2C Address 0x58 ********/ =20 /***************************************************************/ @@ -462,6 +465,14 @@ struct anx7625_i2c_client { struct typec_port; struct usb_role_switch; =20 +#define MAX_BUF_LEN 30 +struct fw_msg { + u8 msg_len; + u8 msg_type; + u8 buf[MAX_BUF_LEN]; +} __packed; +#define HEADER_LEN 2 + struct anx7625_data { struct anx7625_platform_data pdata; struct platform_device *audio_pdev; @@ -497,6 +508,7 @@ struct anx7625_data { struct drm_connector *connector; struct mipi_dsi_device *dsi; struct drm_dp_aux aux; + struct fw_msg send_msg; }; =20 #endif /* __ANX7625_H__ */ --=20 2.47.3