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msm: camera: icp: Check HW state prior to IRQ processing

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Check ICP HW state before processing any IRQ to avoid
any unclocked access.

CRs-Fixed: 2816854
Change-Id: I31fc03f655b1068f5d171385891eba7d281bd4fd
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>
This commit is contained in:
Karthik Anantha Ram 2020-11-11 14:58:16 -08:00
commit ddfe75dc7a
1 changed files with 18 additions and 0 deletions
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18
drivers/cam_icp/icp_hw/a5_hw/a5_core.c
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@ -297,6 +297,7 @@ int cam_a5_init_hw(void *device_priv,
struct cam_a5_device_core_info *core_info = NULL;
struct a5_soc_info *a5_soc_info;
struct cam_icp_cpas_vote cpas_vote;
unsigned long flags;
int rc = 0;
if (!device_priv) {
@ -356,6 +357,10 @@ int cam_a5_init_hw(void *device_priv,
ICP_SIERRA_A5_CSR_ACCESS);
}
spin_lock_irqsave(&a5_dev->hw_lock, flags);
a5_dev->hw_state = CAM_HW_STATE_POWER_UP;
spin_unlock_irqrestore(&a5_dev->hw_lock, flags);
error:
return rc;
}
@ -366,6 +371,7 @@ int cam_a5_deinit_hw(void *device_priv,
struct cam_hw_info *a5_dev = device_priv;
struct cam_hw_soc_info *soc_info = NULL;
struct cam_a5_device_core_info *core_info = NULL;
unsigned long flags;
int rc = 0;
if (!device_priv) {
@ -381,6 +387,10 @@ int cam_a5_deinit_hw(void *device_priv,
return -EINVAL;
}
spin_lock_irqsave(&a5_dev->hw_lock, flags);
a5_dev->hw_state = CAM_HW_STATE_POWER_DOWN;
spin_unlock_irqrestore(&a5_dev->hw_lock, flags);
rc = cam_a5_disable_soc_resources(soc_info);
if (rc)
CAM_ERR(CAM_ICP, "soc disable is failed: %d", rc);
@ -462,6 +472,14 @@ irqreturn_t cam_a5_irq(int irq_num, void *data)
return IRQ_HANDLED;
}
spin_lock(&a5_dev->hw_lock);
if (a5_dev->hw_state == CAM_HW_STATE_POWER_DOWN) {
CAM_WARN(CAM_ICP, "ICP HW powered off");
spin_unlock(&a5_dev->hw_lock);
return IRQ_HANDLED;
}
spin_unlock(&a5_dev->hw_lock);
soc_info = &a5_dev->soc_info;
core_info = (struct cam_a5_device_core_info *)a5_dev->core_info;
hw_info = core_info->a5_hw_info;