[PATCH 3/8] media: iris: migrate firmware loading to qcom_mdt_pas_load() and qcom_pas_prepare_and_auth_reset()

[Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>]

iris_load_fw_to_memory() calls qcom_mdt_load() which bundles metadata
init, memory setup, and segment loading with no PAS context, and
iris_fw_load() calls qcom_pas_auth_and_reset() which skips the shmbridge
prepare step required before TrustZone authentication.

Since the auth call is in a different function from where the PAS context
is allocated, add a pas_ctx pointer to struct iris_core so it can be
threaded between the two call sites.  Replace qcom_mdt_load() with
devm_qcom_pas_context_alloc() and qcom_mdt_pas_load() in
iris_load_fw_to_memory(), storing the context in core->pas_ctx, then
pass it to qcom_pas_prepare_and_auth_reset() in iris_fw_load().

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
---
 drivers/media/platform/qcom/iris/iris_core.h  |  2 ++
 .../media/platform/qcom/iris/iris_firmware.c  | 20 ++++++++-----------
 2 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/media/platform/qcom/iris/iris_core.h b/drivers/media/platform/qcom/iris/iris_core.h
index 24da60448cf2..68e6adcc1dfd 100644
--- a/drivers/media/platform/qcom/iris/iris_core.h
+++ b/drivers/media/platform/qcom/iris/iris_core.h
@@ -8,6 +8,7 @@
 
 #include <linux/types.h>
 #include <linux/pm_domain.h>
+#include <linux/firmware/qcom/qcom_pas.h>
 #include <media/v4l2-device.h>
 
 #include "iris_hfi_common.h"
@@ -123,6 +124,7 @@ struct iris_core {
 	/* encoder and decoder have overlapping caps, so two different arrays are required */
 	struct platform_inst_fw_cap		inst_fw_caps_dec[INST_FW_CAP_MAX];
 	struct platform_inst_fw_cap		inst_fw_caps_enc[INST_FW_CAP_MAX];
+	struct qcom_pas_context			*pas_ctx;
 };
 
 int iris_core_init(struct iris_core *core);
diff --git a/drivers/media/platform/qcom/iris/iris_firmware.c b/drivers/media/platform/qcom/iris/iris_firmware.c
index 21cdf1c39835..e73a5dd98b88 100644
--- a/drivers/media/platform/qcom/iris/iris_firmware.c
+++ b/drivers/media/platform/qcom/iris/iris_firmware.c
@@ -115,9 +115,7 @@ static int iris_load_fw_to_memory(struct iris_core *core)
 	struct resource res;
 	phys_addr_t mem_phys;
 	const char *fw_name;
-	size_t res_size;
 	ssize_t fw_size;
-	void *mem_virt;
 	int ret;
 
 	ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res);
@@ -125,7 +123,6 @@ static int iris_load_fw_to_memory(struct iris_core *core)
 		return ret;
 
 	mem_phys = res.start;
-	res_size = resource_size(&res);
 
 	firmware = iris_detect_firmware(core, &fw_name);
 	if (IS_ERR(firmware))
@@ -134,21 +131,20 @@ static int iris_load_fw_to_memory(struct iris_core *core)
 	core->iris_firmware_data = core->iris_firmware_desc->firmware_data;
 
 	fw_size = qcom_mdt_get_size(firmware);
-	if (fw_size < 0 || res_size < (size_t)fw_size) {
+	if (fw_size < 0 || resource_size(&res) < (size_t)fw_size) {
 		ret = -EINVAL;
 		goto err_release_fw;
 	}
 
-	mem_virt = memremap(mem_phys, res_size, MEMREMAP_WC);
-	if (!mem_virt) {
-		ret = -ENOMEM;
+	core->pas_ctx = devm_qcom_pas_context_alloc(dev, IRIS_PAS_ID, mem_phys,
+						    resource_size(&res));
+	if (IS_ERR(core->pas_ctx)) {
+		ret = PTR_ERR(core->pas_ctx);
+		core->pas_ctx = NULL;
 		goto err_release_fw;
 	}
 
-	ret = qcom_mdt_load(dev, firmware, fw_name,
-			    IRIS_PAS_ID, mem_virt, mem_phys, res_size, NULL);
-
-	memunmap(mem_virt);
+	ret = qcom_mdt_pas_load(core->pas_ctx, firmware, fw_name, NULL);
 err_release_fw:
 	release_firmware(firmware);
 
@@ -166,7 +162,7 @@ int iris_fw_load(struct iris_core *core)
 		return ret;
 	}
 
-	ret = qcom_pas_auth_and_reset(IRIS_PAS_ID);
+	ret = qcom_pas_prepare_and_auth_reset(core->pas_ctx);
 	if (ret)  {
 		dev_err(core->dev, "auth and reset failed: %d\n", ret);
 		return ret;
-- 
2.55.0