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bus: mhi: core: Download AMSS image from appropriate function

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During full boot chain firmware download, the PM state worker
downloads the AMSS image after a blocking wait for the SBL
execution environment change when running in PBL transition
itself. Improve this design by having the host download the AMSS
image from the SBL transition of PM state worker thread when a
DEV_ST_TRANSITION_SBL is queued instead of the blocking wait.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1614208985-20851-3-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Bhaumik Bhatt 2021-02-24 15:23:03 -08:00 committed by Manivannan Sadhasivam
parent 925089c190
commit 4884362f69
3 changed files with 29 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
drivers/bus/mhi/core/boot.c
View File

@ -389,7 +389,6 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl,
void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
{
const struct firmware *firmware = NULL;
struct image_info *image_info;
struct device *dev = &mhi_cntrl->mhi_dev->dev;
const char *fw_name;
void *buf;
@ -491,44 +490,42 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
fw_load_ee_pthru:
/* Transitioning into MHI RESET->READY state */
ret = mhi_ready_state_transition(mhi_cntrl);
if (!mhi_cntrl->fbc_download)
return;
if (ret) {
dev_err(dev, "MHI did not enter READY state\n");
goto error_ready_state;
}
/* Wait for the SBL event */
ret = wait_event_timeout(mhi_cntrl->state_event,
mhi_cntrl->ee == MHI_EE_SBL ||
MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
msecs_to_jiffies(mhi_cntrl->timeout_ms));
if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
dev_err(dev, "MHI did not enter SBL\n");
goto error_ready_state;
}
/* Start full firmware image download */
image_info = mhi_cntrl->fbc_image;
ret = mhi_fw_load_bhie(mhi_cntrl,
/* Vector table is the last entry */
&image_info->mhi_buf[image_info->entries - 1]);
if (ret) {
dev_err(dev, "MHI did not load image over BHIe, ret: %d\n",
ret);
goto error_fw_load;
}
dev_info(dev, "Wait for device to enter SBL or Mission mode\n");
return;
error_ready_state:
mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
mhi_cntrl->fbc_image = NULL;
if (mhi_cntrl->fbc_download) {
mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->fbc_image);
mhi_cntrl->fbc_image = NULL;
}
error_fw_load:
mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
wake_up_all(&mhi_cntrl->state_event);
}
int mhi_download_amss_image(struct mhi_controller *mhi_cntrl)
{
struct image_info *image_info = mhi_cntrl->fbc_image;
struct device *dev = &mhi_cntrl->mhi_dev->dev;
int ret;
if (!image_info)
return -EIO;
ret = mhi_fw_load_bhie(mhi_cntrl,
/* Vector table is the last entry */
&image_info->mhi_buf[image_info->entries - 1]);
if (ret) {
dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret);
mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
wake_up_all(&mhi_cntrl->state_event);
}
return ret;
}

1
drivers/bus/mhi/core/internal.h
View File

@ -619,6 +619,7 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl);
int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl);
int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
enum mhi_cmd_type cmd);
int mhi_download_amss_image(struct mhi_controller *mhi_cntrl);
static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl)
{
return (mhi_cntrl->dev_state >= MHI_STATE_M0 &&

2
drivers/bus/mhi/core/pm.c
View File

@ -758,6 +758,8 @@ void mhi_pm_st_worker(struct work_struct *work)
* either SBL or AMSS states
*/
mhi_create_devices(mhi_cntrl);
if (mhi_cntrl->fbc_download)
mhi_download_amss_image(mhi_cntrl);
break;
case DEV_ST_TRANSITION_MISSION_MODE:
mhi_pm_mission_mode_transition(mhi_cntrl);