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Create a new mhdp helper driver and move all those functions into. cdns_mhdp_reg_write() is renamed to cdns_mhdp_dp_reg_write(), because it use the DPTX command ID DPTX_WRITE_REGISTER. New cdns_mhdp_reg_write() is created with the general command ID GENERAL_REGISTER_WRITE. Rewrite cdns_mhdp_set_firmware_active() in mhdp8546 core driver, use cdns_mhdp_mailbox_send() to replace cdns_mhdp_mailbox_write() same as the other mailbox access functions. Replaces the local mutex mbox_mutex with a global mutex mhdp_mailbox_mutex to prevent race conditions in mailbox access by multi drivers. Signed-off-by: Sandor Yu --- v16->v17: - Replaces the local mutex mbox_mutex with a global mutex mhdp_mailbox_mutex v12->v16: *No change. V11->v12: - Move status initialize out of mbox_mutex. - Reorder API functions in alphabetical. - Add notes for malibox access functions. - Add year 2024 to copyright. drivers/gpu/drm/bridge/cadence/Kconfig | 4 + drivers/gpu/drm/bridge/cadence/Makefile | 1 + .../gpu/drm/bridge/cadence/cdns-mhdp-helper.c | 307 +++++++++++++ .../drm/bridge/cadence/cdns-mhdp8546-core.c | 425 ++++-------------- .../drm/bridge/cadence/cdns-mhdp8546-core.h | 47 +- .../drm/bridge/cadence/cdns-mhdp8546-hdcp.c | 36 +- include/drm/bridge/cdns-mhdp-helper.h | 94 ++++ 7 files changed, 507 insertions(+), 407 deletions(-) create mode 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp-helper.c create mode 100644 include/drm/bridge/cdns-mhdp-helper.h diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig b/drivers/gpu/drm/bridge/cadence/Kconfig index cced81633ddcd..e0973339e9e33 100644 --- a/drivers/gpu/drm/bridge/cadence/Kconfig +++ b/drivers/gpu/drm/bridge/cadence/Kconfig @@ -21,6 +21,9 @@ config DRM_CDNS_DSI_J721E the routing of the DSS DPI signal to the Cadence DSI. endif +config CDNS_MHDP_HELPER + tristate + config DRM_CDNS_MHDP8546 tristate "Cadence DPI/DP bridge" select DRM_DISPLAY_DP_HELPER @@ -28,6 +31,7 @@ config DRM_CDNS_MHDP8546 select DRM_DISPLAY_HELPER select DRM_KMS_HELPER select DRM_PANEL_BRIDGE + select CDNS_MHDP_HELPER depends on OF help Support Cadence DPI to DP bridge. This is an internal diff --git a/drivers/gpu/drm/bridge/cadence/Makefile b/drivers/gpu/drm/bridge/cadence/Makefile index c95fd5b81d137..087dc074820d7 100644 --- a/drivers/gpu/drm/bridge/cadence/Makefile +++ b/drivers/gpu/drm/bridge/cadence/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o cdns-dsi-y := cdns-dsi-core.o cdns-dsi-$(CONFIG_DRM_CDNS_DSI_J721E) += cdns-dsi-j721e.o +obj-$(CONFIG_CDNS_MHDP_HELPER) += cdns-mhdp-helper.o obj-$(CONFIG_DRM_CDNS_MHDP8546) += cdns-mhdp8546.o cdns-mhdp8546-y := cdns-mhdp8546-core.o cdns-mhdp8546-hdcp.o cdns-mhdp8546-$(CONFIG_DRM_CDNS_MHDP8546_J721E) += cdns-mhdp8546-j721e.o diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp-helper.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-helper.c new file mode 100644 index 0000000000000..c60a6b69a5343 --- /dev/null +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-helper.c @@ -0,0 +1,307 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023, 2024 NXP Semiconductor, Inc. + * + */ +#include +#include +#include + +/* Protects mailbox communications with the firmware */ +DEFINE_MUTEX(mhdp_mailbox_mutex); + +/* Mailbox helper functions */ +static int cdns_mhdp_mailbox_read(struct cdns_mhdp_base *base) +{ + int ret, empty; + + WARN_ON(!mutex_is_locked(&mhdp_mailbox_mutex)); + + ret = readx_poll_timeout(readl, base->regs + CDNS_MAILBOX_EMPTY, + empty, !empty, MAILBOX_RETRY_US, + MAILBOX_TIMEOUT_US); + if (ret < 0) + return ret; + + return readl(base->regs + CDNS_MAILBOX_RX_DATA) & 0xff; +} + +static int cdns_mhdp_mailbox_write(struct cdns_mhdp_base *base, u8 val) +{ + int ret, full; + + WARN_ON(!mutex_is_locked(&mhdp_mailbox_mutex)); + + ret = readx_poll_timeout(readl, base->regs + CDNS_MAILBOX_FULL, + full, !full, MAILBOX_RETRY_US, + MAILBOX_TIMEOUT_US); + if (ret < 0) + return ret; + + writel(val, base->regs + CDNS_MAILBOX_TX_DATA); + + return 0; +} + +int cdns_mhdp_mailbox_recv_header(struct cdns_mhdp_base *base, + u8 module_id, u8 opcode, + u16 req_size) +{ + u32 mbox_size, i; + u8 header[4]; + int ret; + + /* read the header of the message */ + for (i = 0; i < sizeof(header); i++) { + ret = cdns_mhdp_mailbox_read(base); + if (ret < 0) + return ret; + + header[i] = ret; + } + + mbox_size = get_unaligned_be16(header + 2); + + if (opcode != header[0] || module_id != header[1] || + req_size != mbox_size) { + /* + * If the message in mailbox is not what we want, we need to + * clear the mailbox by reading its contents. + */ + for (i = 0; i < mbox_size; i++) + if (cdns_mhdp_mailbox_read(base) < 0) + break; + + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_mailbox_recv_header); + +int cdns_mhdp_mailbox_recv_data(struct cdns_mhdp_base *base, + u8 *buff, u16 buff_size) +{ + u32 i; + int ret; + + for (i = 0; i < buff_size; i++) { + ret = cdns_mhdp_mailbox_read(base); + if (ret < 0) + return ret; + + buff[i] = ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_mailbox_recv_data); + +int cdns_mhdp_mailbox_send(struct cdns_mhdp_base *base, u8 module_id, + u8 opcode, u16 size, u8 *message) +{ + u8 header[4]; + int ret, i; + + header[0] = opcode; + header[1] = module_id; + put_unaligned_be16(size, header + 2); + + for (i = 0; i < sizeof(header); i++) { + ret = cdns_mhdp_mailbox_write(base, header[i]); + if (ret) + return ret; + } + + for (i = 0; i < size; i++) { + ret = cdns_mhdp_mailbox_write(base, message[i]); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_mailbox_send); + +/* General helper functions */ +int cdns_mhdp_reg_read(struct cdns_mhdp_base *base, u32 addr, u32 *value) +{ + u8 msg[4], resp[8]; + int ret; + + put_unaligned_be32(addr, msg); + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_GENERAL, + GENERAL_REGISTER_READ, + sizeof(msg), msg); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_header(base, MB_MODULE_ID_GENERAL, + GENERAL_REGISTER_READ, + sizeof(resp)); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_data(base, resp, sizeof(resp)); + if (ret) + goto out; + + /* Returned address value should be the same as requested */ + if (memcmp(msg, resp, sizeof(msg))) { + ret = -EINVAL; + goto out; + } + + *value = get_unaligned_be32(resp + 4); + +out: + mutex_unlock(&mhdp_mailbox_mutex); + if (ret) { + dev_err(base->dev, "Failed to read register\n"); + *value = 0; + } + + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_reg_read); + +int cdns_mhdp_reg_write(struct cdns_mhdp_base *base, u32 addr, u32 val) +{ + u8 msg[8]; + int ret; + + put_unaligned_be32(addr, msg); + put_unaligned_be32(val, msg + 4); + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_GENERAL, + GENERAL_REGISTER_WRITE, + sizeof(msg), msg); + + mutex_unlock(&mhdp_mailbox_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_reg_write); + +/* DPTX helper functions */ +int cdns_mhdp_dp_reg_write(struct cdns_mhdp_base *base, u16 addr, u32 val) +{ + u8 msg[6]; + int ret; + + put_unaligned_be16(addr, msg); + put_unaligned_be32(val, msg + 2); + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_DP_TX, + DPTX_WRITE_REGISTER, sizeof(msg), msg); + + mutex_unlock(&mhdp_mailbox_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_dp_reg_write); + +int cdns_mhdp_dp_reg_write_bit(struct cdns_mhdp_base *base, u16 addr, + u8 start_bit, u8 bits_no, u32 val) +{ + u8 field[8]; + int ret; + + put_unaligned_be16(addr, field); + field[2] = start_bit; + field[3] = bits_no; + put_unaligned_be32(val, field + 4); + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_DP_TX, + DPTX_WRITE_FIELD, sizeof(field), field); + + mutex_unlock(&mhdp_mailbox_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_dp_reg_write_bit); + +int cdns_mhdp_dpcd_read(struct cdns_mhdp_base *base, + u32 addr, u8 *data, u16 len) +{ + u8 msg[5], reg[5]; + int ret; + + put_unaligned_be16(len, msg); + put_unaligned_be24(addr, msg + 2); + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_DP_TX, + DPTX_READ_DPCD, sizeof(msg), msg); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_header(base, MB_MODULE_ID_DP_TX, + DPTX_READ_DPCD, + sizeof(reg) + len); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_data(base, reg, sizeof(reg)); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_data(base, data, len); + +out: + mutex_unlock(&mhdp_mailbox_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_dpcd_read); + +int cdns_mhdp_dpcd_write(struct cdns_mhdp_base *base, u32 addr, u8 value) +{ + u8 msg[6], reg[5]; + int ret; + + put_unaligned_be16(1, msg); + put_unaligned_be24(addr, msg + 2); + msg[5] = value; + + mutex_lock(&mhdp_mailbox_mutex); + + ret = cdns_mhdp_mailbox_send(base, MB_MODULE_ID_DP_TX, + DPTX_WRITE_DPCD, sizeof(msg), msg); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_header(base, MB_MODULE_ID_DP_TX, + DPTX_WRITE_DPCD, sizeof(reg)); + if (ret) + goto out; + + ret = cdns_mhdp_mailbox_recv_data(base, reg, sizeof(reg)); + if (ret) + goto out; + + if (addr != get_unaligned_be24(reg + 2)) + ret = -EINVAL; + +out: + mutex_unlock(&mhdp_mailbox_mutex); + + if (ret) + dev_err(base->dev, "dpcd write failed: %d\n", ret); + return ret; +} +EXPORT_SYMBOL_GPL(cdns_mhdp_dpcd_write); + +MODULE_DESCRIPTION("Cadence MHDP Helper driver"); +MODULE_AUTHOR("Sandor Yu "); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index dee640ab1d3ad..3ceba90a682da 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -73,301 +73,31 @@ static void cdns_mhdp_bridge_hpd_disable(struct drm_bridge *bridge) mhdp->regs + CDNS_APB_INT_MASK); } -static int cdns_mhdp_mailbox_read(struct cdns_mhdp_device *mhdp) -{ - int ret, empty; - - WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex)); - - ret = readx_poll_timeout(readl, mhdp->regs + CDNS_MAILBOX_EMPTY, - empty, !empty, MAILBOX_RETRY_US, - MAILBOX_TIMEOUT_US); - if (ret < 0) - return ret; - - return readl(mhdp->regs + CDNS_MAILBOX_RX_DATA) & 0xff; -} - -static int cdns_mhdp_mailbox_write(struct cdns_mhdp_device *mhdp, u8 val) -{ - int ret, full; - - WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex)); - - ret = readx_poll_timeout(readl, mhdp->regs + CDNS_MAILBOX_FULL, - full, !full, MAILBOX_RETRY_US, - MAILBOX_TIMEOUT_US); - if (ret < 0) - return ret; - - writel(val, mhdp->regs + CDNS_MAILBOX_TX_DATA); - - return 0; -} - -static int cdns_mhdp_mailbox_recv_header(struct cdns_mhdp_device *mhdp, - u8 module_id, u8 opcode, - u16 req_size) -{ - u32 mbox_size, i; - u8 header[4]; - int ret; - - /* read the header of the message */ - for (i = 0; i < sizeof(header); i++) { - ret = cdns_mhdp_mailbox_read(mhdp); - if (ret < 0) - return ret; - - header[i] = ret; - } - - mbox_size = get_unaligned_be16(header + 2); - - if (opcode != header[0] || module_id != header[1] || - req_size != mbox_size) { - /* - * If the message in mailbox is not what we want, we need to - * clear the mailbox by reading its contents. - */ - for (i = 0; i < mbox_size; i++) - if (cdns_mhdp_mailbox_read(mhdp) < 0) - break; - - return -EINVAL; - } - - return 0; -} - -static int cdns_mhdp_mailbox_recv_data(struct cdns_mhdp_device *mhdp, - u8 *buff, u16 buff_size) -{ - u32 i; - int ret; - - for (i = 0; i < buff_size; i++) { - ret = cdns_mhdp_mailbox_read(mhdp); - if (ret < 0) - return ret; - - buff[i] = ret; - } - - return 0; -} - -static int cdns_mhdp_mailbox_send(struct cdns_mhdp_device *mhdp, u8 module_id, - u8 opcode, u16 size, u8 *message) -{ - u8 header[4]; - int ret, i; - - header[0] = opcode; - header[1] = module_id; - put_unaligned_be16(size, header + 2); - - for (i = 0; i < sizeof(header); i++) { - ret = cdns_mhdp_mailbox_write(mhdp, header[i]); - if (ret) - return ret; - } - - for (i = 0; i < size; i++) { - ret = cdns_mhdp_mailbox_write(mhdp, message[i]); - if (ret) - return ret; - } - - return 0; -} - -static -int cdns_mhdp_reg_read(struct cdns_mhdp_device *mhdp, u32 addr, u32 *value) -{ - u8 msg[4], resp[8]; - int ret; - - put_unaligned_be32(addr, msg); - - mutex_lock(&mhdp->mbox_mutex); - - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_GENERAL, - GENERAL_REGISTER_READ, - sizeof(msg), msg); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_GENERAL, - GENERAL_REGISTER_READ, - sizeof(resp)); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_data(mhdp, resp, sizeof(resp)); - if (ret) - goto out; - - /* Returned address value should be the same as requested */ - if (memcmp(msg, resp, sizeof(msg))) { - ret = -EINVAL; - goto out; - } - - *value = get_unaligned_be32(resp + 4); - -out: - mutex_unlock(&mhdp->mbox_mutex); - if (ret) { - dev_err(mhdp->dev, "Failed to read register\n"); - *value = 0; - } - - return ret; -} - -static -int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val) -{ - u8 msg[6]; - int ret; - - put_unaligned_be16(addr, msg); - put_unaligned_be32(val, msg + 2); - - mutex_lock(&mhdp->mbox_mutex); - - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, - DPTX_WRITE_REGISTER, sizeof(msg), msg); - - mutex_unlock(&mhdp->mbox_mutex); - - return ret; -} - -static -int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr, - u8 start_bit, u8 bits_no, u32 val) -{ - u8 field[8]; - int ret; - - put_unaligned_be16(addr, field); - field[2] = start_bit; - field[3] = bits_no; - put_unaligned_be32(val, field + 4); - - mutex_lock(&mhdp->mbox_mutex); - - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, - DPTX_WRITE_FIELD, sizeof(field), field); - - mutex_unlock(&mhdp->mbox_mutex); - - return ret; -} - -static -int cdns_mhdp_dpcd_read(struct cdns_mhdp_device *mhdp, - u32 addr, u8 *data, u16 len) -{ - u8 msg[5], reg[5]; - int ret; - - put_unaligned_be16(len, msg); - put_unaligned_be24(addr, msg + 2); - - mutex_lock(&mhdp->mbox_mutex); - - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, - DPTX_READ_DPCD, sizeof(msg), msg); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, - DPTX_READ_DPCD, - sizeof(reg) + len); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg)); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_data(mhdp, data, len); - -out: - mutex_unlock(&mhdp->mbox_mutex); - - return ret; -} - static -int cdns_mhdp_dpcd_write(struct cdns_mhdp_device *mhdp, u32 addr, u8 value) +int cdns_mhdp_set_firmware_active(struct cdns_mhdp_device *mhdp, bool enable) { - u8 msg[6], reg[5]; + u8 status; int ret; - put_unaligned_be16(1, msg); - put_unaligned_be24(addr, msg + 2); - msg[5] = value; - - mutex_lock(&mhdp->mbox_mutex); + status = enable ? FW_ACTIVE : FW_STANDBY; - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, - DPTX_WRITE_DPCD, sizeof(msg), msg); - if (ret) - goto out; - - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, - DPTX_WRITE_DPCD, sizeof(reg)); - if (ret) - goto out; + mutex_lock(&mhdp_mailbox_mutex); - ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg)); + ret = cdns_mhdp_mailbox_send(&mhdp->base, MB_MODULE_ID_GENERAL, + GENERAL_MAIN_CONTROL, sizeof(status), &status); if (ret) goto out; - if (addr != get_unaligned_be24(reg + 2)) - ret = -EINVAL; - -out: - mutex_unlock(&mhdp->mbox_mutex); - - if (ret) - dev_err(mhdp->dev, "dpcd write failed: %d\n", ret); - return ret; -} - -static -int cdns_mhdp_set_firmware_active(struct cdns_mhdp_device *mhdp, bool enable) -{ - u8 msg[5]; - int ret, i; - - msg[0] = GENERAL_MAIN_CONTROL; - msg[1] = MB_MODULE_ID_GENERAL; - msg[2] = 0; - msg[3] = 1; - msg[4] = enable ? FW_ACTIVE : FW_STANDBY; - - mutex_lock(&mhdp->mbox_mutex); - - for (i = 0; i < sizeof(msg); i++) { - ret = cdns_mhdp_mailbox_write(mhdp, msg[i]); - if (ret) - goto out; - } - - /* read the firmware state */ - ret = cdns_mhdp_mailbox_recv_data(mhdp, msg, sizeof(msg)); + ret = cdns_mhdp_mailbox_recv_header(&mhdp->base, MB_MODULE_ID_GENERAL, + GENERAL_MAIN_CONTROL, + sizeof(status)); if (ret) goto out; - ret = 0; + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, &status, sizeof(status)); out: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); if (ret < 0) dev_err(mhdp->dev, "set firmware active failed\n"); @@ -380,24 +110,24 @@ int cdns_mhdp_get_hpd_status(struct cdns_mhdp_device *mhdp) u8 status; int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_send(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_HPD_STATE, 0, NULL); if (ret) goto err_get_hpd; - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_recv_header(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_HPD_STATE, sizeof(status)); if (ret) goto err_get_hpd; - ret = cdns_mhdp_mailbox_recv_data(mhdp, &status, sizeof(status)); + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, &status, sizeof(status)); if (ret) goto err_get_hpd; - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); dev_dbg(mhdp->dev, "%s: HPD %splugged\n", __func__, status ? "" : "un"); @@ -405,7 +135,7 @@ int cdns_mhdp_get_hpd_status(struct cdns_mhdp_device *mhdp) return status; err_get_hpd: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -418,28 +148,28 @@ int cdns_mhdp_get_edid_block(void *data, u8 *edid, u8 msg[2], reg[2], i; int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); for (i = 0; i < 4; i++) { msg[0] = block / 2; msg[1] = block % 2; - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_send(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_GET_EDID, sizeof(msg), msg); if (ret) continue; - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_recv_header(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_GET_EDID, sizeof(reg) + length); if (ret) continue; - ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg)); + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, reg, sizeof(reg)); if (ret) continue; - ret = cdns_mhdp_mailbox_recv_data(mhdp, edid, length); + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, edid, length); if (ret) continue; @@ -447,7 +177,7 @@ int cdns_mhdp_get_edid_block(void *data, u8 *edid, break; } - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); if (ret) dev_err(mhdp->dev, "get block[%d] edid failed: %d\n", @@ -462,21 +192,21 @@ int cdns_mhdp_read_hpd_event(struct cdns_mhdp_device *mhdp) u8 event = 0; int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_send(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_READ_EVENT, 0, NULL); if (ret) goto out; - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_recv_header(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_READ_EVENT, sizeof(event)); if (ret < 0) goto out; - ret = cdns_mhdp_mailbox_recv_data(mhdp, &event, sizeof(event)); + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, &event, sizeof(event)); out: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); if (ret < 0) return ret; @@ -510,22 +240,22 @@ int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp, unsigned int nlanes, put_unaligned_be16(udelay, payload + 1); memcpy(payload + 3, lanes_data, nlanes); - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); - ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_send(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_ADJUST_LT, sizeof(payload), payload); if (ret) goto out; /* Yes, read the DPCD read command response */ - ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX, + ret = cdns_mhdp_mailbox_recv_header(&mhdp->base, MB_MODULE_ID_DP_TX, DPTX_READ_DPCD, sizeof(hdr) + DP_LINK_STATUS_SIZE); if (ret) goto out; - ret = cdns_mhdp_mailbox_recv_data(mhdp, hdr, sizeof(hdr)); + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, hdr, sizeof(hdr)); if (ret) goto out; @@ -533,11 +263,11 @@ int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp, unsigned int nlanes, if (addr != DP_LANE0_1_STATUS) goto out; - ret = cdns_mhdp_mailbox_recv_data(mhdp, link_status, + ret = cdns_mhdp_mailbox_recv_data(&mhdp->base, link_status, DP_LINK_STATUS_SIZE); out: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); if (ret) dev_err(mhdp->dev, "Failed to adjust Link Training.\n"); @@ -847,7 +577,7 @@ static ssize_t cdns_mhdp_transfer(struct drm_dp_aux *aux, unsigned int i; for (i = 0; i < msg->size; ++i) { - ret = cdns_mhdp_dpcd_write(mhdp, + ret = cdns_mhdp_dpcd_write(&mhdp->base, msg->address + i, buf[i]); if (!ret) continue; @@ -859,7 +589,7 @@ static ssize_t cdns_mhdp_transfer(struct drm_dp_aux *aux, return ret; } } else { - ret = cdns_mhdp_dpcd_read(mhdp, msg->address, + ret = cdns_mhdp_dpcd_read(&mhdp->base, msg->address, msg->buffer, msg->size); if (ret) { dev_err(mhdp->dev, @@ -887,12 +617,12 @@ static int cdns_mhdp_link_training_init(struct cdns_mhdp_device *mhdp) if (!mhdp->host.scrambler) reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_PHY_CONFIG, reg32); - cdns_mhdp_reg_write(mhdp, CDNS_DP_ENHNCD, + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_ENHNCD, mhdp->sink.enhanced & mhdp->host.enhanced); - cdns_mhdp_reg_write(mhdp, CDNS_DP_LANE_EN, + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_LANE_EN, CDNS_DP_LANE_EN_LANES(mhdp->link.num_lanes)); cdns_mhdp_link_configure(&mhdp->aux, &mhdp->link); @@ -913,7 +643,7 @@ static int cdns_mhdp_link_training_init(struct cdns_mhdp_device *mhdp) return ret; } - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_PHY_CONFIG, CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_EN | CDNS_PHY_TRAINING_TYPE(1) | @@ -1058,7 +788,7 @@ static bool cdns_mhdp_link_training_channel_eq(struct cdns_mhdp_device *mhdp, CDNS_PHY_TRAINING_TYPE(eq_tps); if (eq_tps != 4) reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_PHY_CONFIG, reg32); drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, (eq_tps != 4) ? eq_tps | DP_LINK_SCRAMBLING_DISABLE : @@ -1322,7 +1052,7 @@ static int cdns_mhdp_link_training(struct cdns_mhdp_device *mhdp, mhdp->host.scrambler ? 0 : DP_LINK_SCRAMBLING_DISABLE); - ret = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, ®32); + ret = cdns_mhdp_reg_read(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, ®32); if (ret < 0) { dev_err(mhdp->dev, "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n", @@ -1333,13 +1063,13 @@ static int cdns_mhdp_link_training(struct cdns_mhdp_device *mhdp, reg32 |= CDNS_DP_NUM_LANES(mhdp->link.num_lanes); reg32 |= CDNS_DP_WR_FAILING_EDGE_VSYNC; reg32 |= CDNS_DP_FRAMER_EN; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, reg32); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, reg32); /* Reset PHY config */ reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1); if (!mhdp->host.scrambler) reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_PHY_CONFIG, reg32); return 0; err: @@ -1347,7 +1077,7 @@ static int cdns_mhdp_link_training(struct cdns_mhdp_device *mhdp, reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1); if (!mhdp->host.scrambler) reg32 |= CDNS_PHY_SCRAMBLER_BYPASS; - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_PHY_CONFIG, reg32); drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); @@ -1461,7 +1191,7 @@ static int cdns_mhdp_link_up(struct cdns_mhdp_device *mhdp) mhdp->link.num_lanes = cdns_mhdp_max_num_lanes(mhdp); /* Disable framer for link training */ - err = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); + err = cdns_mhdp_reg_read(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); if (err < 0) { dev_err(mhdp->dev, "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n", @@ -1470,7 +1200,7 @@ static int cdns_mhdp_link_up(struct cdns_mhdp_device *mhdp) } resp &= ~CDNS_DP_FRAMER_EN; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp); /* Spread AMP if required, enable 8b/10b coding */ amp[0] = cdns_mhdp_get_ssc_supported(mhdp) ? DP_SPREAD_AMP_0_5 : 0; @@ -1834,7 +1564,7 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, if (mode->flags & DRM_MODE_FLAG_INTERLACE) bnd_hsync2vsync |= CDNS_IP_DET_INTERLACE_FORMAT; - cdns_mhdp_reg_write(mhdp, CDNS_BND_HSYNC2VSYNC(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_BND_HSYNC2VSYNC(stream_id), bnd_hsync2vsync); hsync2vsync_pol_ctrl = 0; @@ -1842,10 +1572,10 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, hsync2vsync_pol_ctrl |= CDNS_H2V_HSYNC_POL_ACTIVE_LOW; if (mode->flags & DRM_MODE_FLAG_NVSYNC) hsync2vsync_pol_ctrl |= CDNS_H2V_VSYNC_POL_ACTIVE_LOW; - cdns_mhdp_reg_write(mhdp, CDNS_HSYNC2VSYNC_POL_CTRL(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_HSYNC2VSYNC_POL_CTRL(stream_id), hsync2vsync_pol_ctrl); - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_PXL_REPR(stream_id), pxl_repr); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_PXL_REPR(stream_id), pxl_repr); if (mode->flags & DRM_MODE_FLAG_INTERLACE) dp_framer_sp |= CDNS_DP_FRAMER_INTERLACE; @@ -1853,19 +1583,19 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, dp_framer_sp |= CDNS_DP_FRAMER_HSYNC_POL_LOW; if (mode->flags & DRM_MODE_FLAG_NVSYNC) dp_framer_sp |= CDNS_DP_FRAMER_VSYNC_POL_LOW; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_SP(stream_id), dp_framer_sp); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_SP(stream_id), dp_framer_sp); front_porch = mode->crtc_hsync_start - mode->crtc_hdisplay; back_porch = mode->crtc_htotal - mode->crtc_hsync_end; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRONT_BACK_PORCH(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRONT_BACK_PORCH(stream_id), CDNS_DP_FRONT_PORCH(front_porch) | CDNS_DP_BACK_PORCH(back_porch)); - cdns_mhdp_reg_write(mhdp, CDNS_DP_BYTE_COUNT(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_BYTE_COUNT(stream_id), mode->crtc_hdisplay * bpp / 8); msa_h0 = mode->crtc_htotal - mode->crtc_hsync_start; - cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_0(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_MSA_HORIZONTAL_0(stream_id), CDNS_DP_MSAH0_H_TOTAL(mode->crtc_htotal) | CDNS_DP_MSAH0_HSYNC_START(msa_h0)); @@ -1874,11 +1604,11 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, CDNS_DP_MSAH1_HDISP_WIDTH(mode->crtc_hdisplay); if (mode->flags & DRM_MODE_FLAG_NHSYNC) msa_horizontal_1 |= CDNS_DP_MSAH1_HSYNC_POL_LOW; - cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_1(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_MSA_HORIZONTAL_1(stream_id), msa_horizontal_1); msa_v0 = mode->crtc_vtotal - mode->crtc_vsync_start; - cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_0(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_MSA_VERTICAL_0(stream_id), CDNS_DP_MSAV0_V_TOTAL(mode->crtc_vtotal) | CDNS_DP_MSAV0_VSYNC_START(msa_v0)); @@ -1887,7 +1617,7 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, CDNS_DP_MSAV1_VDISP_WIDTH(mode->crtc_vdisplay); if (mode->flags & DRM_MODE_FLAG_NVSYNC) msa_vertical_1 |= CDNS_DP_MSAV1_VSYNC_POL_LOW; - cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_1(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_MSA_VERTICAL_1(stream_id), msa_vertical_1); if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && @@ -1899,14 +1629,14 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, if (pxlfmt == DRM_COLOR_FORMAT_YCBCR420) misc1 = CDNS_DP_TEST_VSC_SDP; - cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_MISC(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_MSA_MISC(stream_id), misc0 | (misc1 << 8)); - cdns_mhdp_reg_write(mhdp, CDNS_DP_HORIZONTAL(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_HORIZONTAL(stream_id), CDNS_DP_H_HSYNC_WIDTH(hsync) | CDNS_DP_H_H_TOTAL(mode->crtc_hdisplay)); - cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_0(stream_id), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_VERTICAL_0(stream_id), CDNS_DP_V0_VHEIGHT(mode->crtc_vdisplay) | CDNS_DP_V0_VSTART(msa_v0)); @@ -1915,13 +1645,13 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, mode->crtc_vtotal % 2 == 0) dp_vertical_1 |= CDNS_DP_V1_VTOTAL_EVEN; - cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_1(stream_id), dp_vertical_1); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_VERTICAL_1(stream_id), dp_vertical_1); - cdns_mhdp_reg_write_bit(mhdp, CDNS_DP_VB_ID(stream_id), 2, 1, - (mode->flags & DRM_MODE_FLAG_INTERLACE) ? - CDNS_DP_VB_ID_INTERLACED : 0); + cdns_mhdp_dp_reg_write_bit(&mhdp->base, CDNS_DP_VB_ID(stream_id), 2, 1, + (mode->flags & DRM_MODE_FLAG_INTERLACE) ? + CDNS_DP_VB_ID_INTERLACED : 0); - ret = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &framer); + ret = cdns_mhdp_reg_read(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, &framer); if (ret < 0) { dev_err(mhdp->dev, "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n", @@ -1930,7 +1660,7 @@ static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp, } framer |= CDNS_DP_FRAMER_EN; framer &= ~CDNS_DP_NO_VIDEO_MODE; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, framer); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, framer); } static void cdns_mhdp_sst_enable(struct cdns_mhdp_device *mhdp, @@ -1963,15 +1693,15 @@ static void cdns_mhdp_sst_enable(struct cdns_mhdp_device *mhdp, mhdp->stream_id = 0; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_TU, + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_TU, CDNS_DP_FRAMER_TU_VS(vs) | CDNS_DP_FRAMER_TU_SIZE(tu_size) | CDNS_DP_FRAMER_TU_CNT_RST_EN); - cdns_mhdp_reg_write(mhdp, CDNS_DP_LINE_THRESH(0), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_LINE_THRESH(0), line_thresh & GENMASK(5, 0)); - cdns_mhdp_reg_write(mhdp, CDNS_DP_STREAM_CONFIG_2(0), + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_STREAM_CONFIG_2(0), CDNS_DP_SC2_TU_VS_DIFF((tu_size - vs > 3) ? 0 : tu_size - vs)); @@ -2006,13 +1736,13 @@ static void cdns_mhdp_atomic_enable(struct drm_bridge *bridge, mhdp->info->ops->enable(mhdp); /* Enable VIF clock for stream 0 */ - ret = cdns_mhdp_reg_read(mhdp, CDNS_DPTX_CAR, &resp); + ret = cdns_mhdp_reg_read(&mhdp->base, CDNS_DPTX_CAR, &resp); if (ret < 0) { dev_err(mhdp->dev, "Failed to read CDNS_DPTX_CAR %d\n", ret); goto out; } - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR, + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_CAR, resp | CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN); connector = drm_atomic_get_new_connector_for_encoder(state, @@ -2083,16 +1813,16 @@ static void cdns_mhdp_atomic_disable(struct drm_bridge *bridge, cdns_mhdp_hdcp_disable(mhdp); mhdp->bridge_enabled = false; - cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); + cdns_mhdp_reg_read(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); resp &= ~CDNS_DP_FRAMER_EN; resp |= CDNS_DP_NO_VIDEO_MODE; - cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp); cdns_mhdp_link_down(mhdp); /* Disable VIF clock for stream 0 */ - cdns_mhdp_reg_read(mhdp, CDNS_DPTX_CAR, &resp); - cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR, + cdns_mhdp_reg_read(&mhdp->base, CDNS_DPTX_CAR, &resp); + cdns_mhdp_reg_write(&mhdp->base, CDNS_DPTX_CAR, resp & ~(CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN)); if (mhdp->info && mhdp->info->ops && mhdp->info->ops->disable) @@ -2471,7 +2201,6 @@ static int cdns_mhdp_probe(struct platform_device *pdev) mhdp->clk = clk; mhdp->dev = dev; - mutex_init(&mhdp->mbox_mutex); mutex_init(&mhdp->link_mutex); spin_lock_init(&mhdp->start_lock); @@ -2502,6 +2231,10 @@ static int cdns_mhdp_probe(struct platform_device *pdev) platform_set_drvdata(pdev, mhdp); + /* init base struct for access mailbox */ + mhdp->base.dev = mhdp->dev; + mhdp->base.regs = mhdp->regs; + mhdp->info = of_device_get_match_data(dev); clk_prepare_enable(clk); diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h index bad2fc0c73066..d209c7b3bbfab 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h @@ -15,6 +15,7 @@ #include #include +#include #include #include #include @@ -27,10 +28,6 @@ struct phy; #define CDNS_APB_CTRL 0x00000 #define CDNS_CPU_STALL BIT(3) -#define CDNS_MAILBOX_FULL 0x00008 -#define CDNS_MAILBOX_EMPTY 0x0000c -#define CDNS_MAILBOX_TX_DATA 0x00010 -#define CDNS_MAILBOX_RX_DATA 0x00014 #define CDNS_KEEP_ALIVE 0x00018 #define CDNS_KEEP_ALIVE_MASK GENMASK(7, 0) @@ -198,45 +195,10 @@ struct phy; #define CDNS_DP_BYTE_COUNT(s) (CDNS_DPTX_STREAM(s) + 0x7c) #define CDNS_DP_BYTE_COUNT_BYTES_IN_CHUNK_SHIFT 16 -/* mailbox */ -#define MAILBOX_RETRY_US 1000 -#define MAILBOX_TIMEOUT_US 2000000 - -#define MB_OPCODE_ID 0 -#define MB_MODULE_ID 1 -#define MB_SIZE_MSB_ID 2 -#define MB_SIZE_LSB_ID 3 -#define MB_DATA_ID 4 - -#define MB_MODULE_ID_DP_TX 0x01 -#define MB_MODULE_ID_HDCP_TX 0x07 -#define MB_MODULE_ID_HDCP_RX 0x08 -#define MB_MODULE_ID_HDCP_GENERAL 0x09 -#define MB_MODULE_ID_GENERAL 0x0a - -/* firmware and opcodes */ +/* firmware */ #define FW_NAME "cadence/mhdp8546.bin" #define CDNS_MHDP_IMEM 0x10000 -#define GENERAL_MAIN_CONTROL 0x01 -#define GENERAL_TEST_ECHO 0x02 -#define GENERAL_BUS_SETTINGS 0x03 -#define GENERAL_TEST_ACCESS 0x04 -#define GENERAL_REGISTER_READ 0x07 - -#define DPTX_SET_POWER_MNG 0x00 -#define DPTX_GET_EDID 0x02 -#define DPTX_READ_DPCD 0x03 -#define DPTX_WRITE_DPCD 0x04 -#define DPTX_ENABLE_EVENT 0x05 -#define DPTX_WRITE_REGISTER 0x06 -#define DPTX_READ_REGISTER 0x07 -#define DPTX_WRITE_FIELD 0x08 -#define DPTX_READ_EVENT 0x0a -#define DPTX_GET_LAST_AUX_STAUS 0x0e -#define DPTX_HPD_STATE 0x11 -#define DPTX_ADJUST_LT 0x12 - #define FW_STANDBY 0 #define FW_ACTIVE 1 @@ -352,6 +314,8 @@ struct cdns_mhdp_hdcp { }; struct cdns_mhdp_device { + struct cdns_mhdp_base base; + void __iomem *regs; void __iomem *sapb_regs; void __iomem *j721e_regs; @@ -362,9 +326,6 @@ struct cdns_mhdp_device { const struct cdns_mhdp_platform_info *info; - /* This is to protect mailbox communications with the firmware */ - struct mutex mbox_mutex; - /* * "link_mutex" protects the access to all the link parameters * including the link training process. Link training will be diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c index 5e3b8edcf7948..21164ff78be23 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c @@ -19,7 +19,7 @@ static int cdns_mhdp_secure_mailbox_read(struct cdns_mhdp_device *mhdp) { int ret, empty; - WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex)); + WARN_ON(!mutex_is_locked(&mhdp_mailbox_mutex)); ret = readx_poll_timeout(readl, mhdp->sapb_regs + CDNS_MAILBOX_EMPTY, empty, !empty, MAILBOX_RETRY_US, @@ -35,7 +35,7 @@ static int cdns_mhdp_secure_mailbox_write(struct cdns_mhdp_device *mhdp, { int ret, full; - WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex)); + WARN_ON(!mutex_is_locked(&mhdp_mailbox_mutex)); ret = readx_poll_timeout(readl, mhdp->sapb_regs + CDNS_MAILBOX_FULL, full, !full, MAILBOX_RETRY_US, @@ -131,7 +131,7 @@ static int cdns_mhdp_hdcp_get_status(struct cdns_mhdp_device *mhdp, u8 hdcp_status[HDCP_STATUS_SIZE]; int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP_TRAN_STATUS_CHANGE, 0, NULL); if (ret) @@ -151,7 +151,7 @@ static int cdns_mhdp_hdcp_get_status(struct cdns_mhdp_device *mhdp, *hdcp_port_status = ((u16)(hdcp_status[0] << 8) | hdcp_status[1]); err_get_hdcp_status: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -172,11 +172,11 @@ static int cdns_mhdp_hdcp_rx_id_valid_response(struct cdns_mhdp_device *mhdp, { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP_TRAN_RESPOND_RECEIVER_ID_VALID, 1, &valid); - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -188,7 +188,7 @@ static int cdns_mhdp_hdcp_rx_id_valid(struct cdns_mhdp_device *mhdp, u8 status; int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP_TRAN_IS_REC_ID_VALID, 0, NULL); if (ret) @@ -209,7 +209,7 @@ static int cdns_mhdp_hdcp_rx_id_valid(struct cdns_mhdp_device *mhdp, ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, hdcp_rx_id, 5 * *recv_num); err_rx_id_valid: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -219,10 +219,10 @@ static int cdns_mhdp_hdcp_km_stored_resp(struct cdns_mhdp_device *mhdp, { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP2X_TX_RESPOND_KM, size, km); - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -232,7 +232,7 @@ static int cdns_mhdp_hdcp_tx_is_km_stored(struct cdns_mhdp_device *mhdp, { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP2X_TX_IS_KM_STORED, 0, NULL); if (ret) @@ -246,7 +246,7 @@ static int cdns_mhdp_hdcp_tx_is_km_stored(struct cdns_mhdp_device *mhdp, ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, resp, size); err_is_km_stored: - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -256,10 +256,10 @@ static int cdns_mhdp_hdcp_tx_config(struct cdns_mhdp_device *mhdp, { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP_TRAN_CONFIGURATION, 1, &hdcp_cfg); - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -504,11 +504,11 @@ int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val) { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_GENERAL, HDCP_GENERAL_SET_LC_128, 16, val); - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } @@ -519,11 +519,11 @@ cdns_mhdp_hdcp_set_public_key_param(struct cdns_mhdp_device *mhdp, { int ret; - mutex_lock(&mhdp->mbox_mutex); + mutex_lock(&mhdp_mailbox_mutex); ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX, HDCP2X_TX_SET_PUBLIC_KEY_PARAMS, sizeof(*val), (u8 *)val); - mutex_unlock(&mhdp->mbox_mutex); + mutex_unlock(&mhdp_mailbox_mutex); return ret; } diff --git a/include/drm/bridge/cdns-mhdp-helper.h b/include/drm/bridge/cdns-mhdp-helper.h new file mode 100644 index 0000000000000..a0727cbbace55 --- /dev/null +++ b/include/drm/bridge/cdns-mhdp-helper.h @@ -0,0 +1,94 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2023-2024 NXP Semiconductor, Inc. + */ +#ifndef __CDNS_MHDP_HELPER_H__ +#define __CDNS_MHDP_HELPER_H__ + +#include +#include + +/* mailbox regs offset */ +#define CDNS_MAILBOX_FULL 0x00008 +#define CDNS_MAILBOX_EMPTY 0x0000c +#define CDNS_MAILBOX_TX_DATA 0x00010 +#define CDNS_MAILBOX_RX_DATA 0x00014 + +#define MAILBOX_RETRY_US 1000 +#define MAILBOX_TIMEOUT_US 2000000 + +/* Module ID Code */ +#define MB_MODULE_ID_DP_TX 0x01 +#define MB_MODULE_ID_HDMI_TX 0x03 +#define MB_MODULE_ID_HDCP_TX 0x07 +#define MB_MODULE_ID_HDCP_RX 0x08 +#define MB_MODULE_ID_HDCP_GENERAL 0x09 +#define MB_MODULE_ID_GENERAL 0x0A + +/* General Commands */ +#define GENERAL_MAIN_CONTROL 0x01 +#define GENERAL_TEST_ECHO 0x02 +#define GENERAL_BUS_SETTINGS 0x03 +#define GENERAL_TEST_ACCESS 0x04 +#define GENERAL_REGISTER_WRITE 0x05 +#define GENERAL_WRITE_FIELD 0x06 +#define GENERAL_REGISTER_READ 0x07 +#define GENERAL_GET_HPD_STATE 0x11 + +/* DPTX Commands */ +#define DPTX_SET_POWER_MNG 0x00 +#define DPTX_SET_HOST_CAPABILITIES 0x01 +#define DPTX_GET_EDID 0x02 +#define DPTX_READ_DPCD 0x03 +#define DPTX_WRITE_DPCD 0x04 +#define DPTX_ENABLE_EVENT 0x05 +#define DPTX_WRITE_REGISTER 0x06 +#define DPTX_READ_REGISTER 0x07 +#define DPTX_WRITE_FIELD 0x08 +#define DPTX_TRAINING_CONTROL 0x09 +#define DPTX_READ_EVENT 0x0a +#define DPTX_READ_LINK_STAT 0x0b +#define DPTX_SET_VIDEO 0x0c +#define DPTX_SET_AUDIO 0x0d +#define DPTX_GET_LAST_AUX_STAUS 0x0e +#define DPTX_SET_LINK_BREAK_POINT 0x0f +#define DPTX_FORCE_LANES 0x10 +#define DPTX_HPD_STATE 0x11 +#define DPTX_ADJUST_LT 0x12 + +/* HDMI TX Commands */ +#define HDMI_TX_READ 0x00 +#define HDMI_TX_WRITE 0x01 +#define HDMI_TX_UPDATE_READ 0x02 +#define HDMI_TX_EDID 0x03 +#define HDMI_TX_EVENTS 0x04 +#define HDMI_TX_HPD_STATUS 0x05 + +extern struct mutex mhdp_mailbox_mutex; + +struct cdns_mhdp_base { + struct device *dev; + void __iomem *regs; +}; + +/* Mailbox helper functions */ +int cdns_mhdp_mailbox_recv_data(struct cdns_mhdp_base *base, + u8 *buff, u16 buff_size); +int cdns_mhdp_mailbox_recv_header(struct cdns_mhdp_base *base, + u8 module_id, u8 opcode, u16 req_size); +int cdns_mhdp_mailbox_send(struct cdns_mhdp_base *base, u8 module_id, + u8 opcode, u16 size, u8 *message); + +/* General commands helper functions */ +int cdns_mhdp_reg_read(struct cdns_mhdp_base *base, u32 addr, u32 *value); +int cdns_mhdp_reg_write(struct cdns_mhdp_base *base, u32 addr, u32 val); + +/* DPTX commands helper functions */ +int cdns_mhdp_dp_reg_write(struct cdns_mhdp_base *base, u16 addr, u32 val); +int cdns_mhdp_dp_reg_write_bit(struct cdns_mhdp_base *base, u16 addr, + u8 start_bit, u8 bits_no, u32 val); +int cdns_mhdp_dpcd_read(struct cdns_mhdp_base *base, + u32 addr, u8 *data, u16 len); +int cdns_mhdp_dpcd_write(struct cdns_mhdp_base *base, u32 addr, u8 value); + +#endif /* __CDNS_MHDP_HELPER_H__ */