[PATCH 4/8] media: venus: migrate firmware loading to qcom_mdt_pas_load() and qcom_pas_prepare_and_auth_reset()

[Mukesh Ojha]

venus_load_fw() uses qcom_mdt_load() for the TZ path and a bare
memremap()/qcom_mdt_load_no_init()/memunmap() sequence for the non-TZ
path.  venus_boot() then calls qcom_pas_auth_and_reset() which skips the
shmbridge prepare step required before TrustZone authentication.

For the TZ path, add a pas_ctx pointer to struct video_firmware so the
context can be threaded from venus_load_fw() where it is allocated to
venus_boot() where authentication happens.  Replace qcom_mdt_load() with
devm_qcom_pas_context_alloc() and qcom_mdt_pas_load(), storing the
context in core->fw.pas_ctx, then pass it to
qcom_pas_prepare_and_auth_reset() in venus_boot().

For the non-TZ path, pass NULL to qcom_mdt_load_no_init() directly,
removing the explicit memremap()/memunmap() since qcom_mdt_load_no_init()
handles the mapping internally when mem_region is NULL.

Signed-off-by: Mukesh Ojha <mukesh.ojha@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/qcom/venus/core.h     |  2 ++
 drivers/media/platform/qcom/venus/firmware.c | 29 +++++++++-----------
 2 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 46705a666776..adcf67043bf6 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -9,6 +9,7 @@
 
 #include <linux/bitops.h>
 #include <linux/list.h>
+#include <linux/firmware/qcom/qcom_pas.h>
 #include <media/videobuf2-v4l2.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
@@ -223,6 +224,7 @@ struct venus_core {
 		size_t mapped_mem_size;
 		phys_addr_t mem_phys;
 		size_t mem_size;
+		struct qcom_pas_context *pas_ctx;
 	} fw;
 	struct mutex lock;
 	struct list_head instances;
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 3a38ff985822..4ea4c7769ac3 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -86,7 +86,6 @@ static int venus_load_fw(struct venus_core *core, const char *fwname,
 	struct resource res;
 	struct device *dev;
 	ssize_t fw_size;
-	void *mem_va;
 	int ret;
 
 	*mem_phys = 0;
@@ -117,21 +116,19 @@ static int venus_load_fw(struct venus_core *core, const char *fwname,
 		goto err_release_fw;
 	}
 
-	mem_va = memremap(*mem_phys, *mem_size, MEMREMAP_WC);
-	if (!mem_va) {
-		dev_err(dev, "unable to map memory region %pa size %#zx\n", mem_phys, *mem_size);
-		ret = -ENOMEM;
-		goto err_release_fw;
-	}
-
-	if (core->use_tz)
-		ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID,
-				    mem_va, *mem_phys, *mem_size, NULL);
-	else
-		ret = qcom_mdt_load_no_init(dev, mdt, fwname, mem_va,
+	if (core->use_tz) {
+		core->fw.pas_ctx = devm_qcom_pas_context_alloc(dev, VENUS_PAS_ID,
+							       *mem_phys, *mem_size);
+		if (IS_ERR(core->fw.pas_ctx)) {
+			ret = PTR_ERR(core->fw.pas_ctx);
+			core->fw.pas_ctx = NULL;
+			goto err_release_fw;
+		}
+		ret = qcom_mdt_pas_load(core->fw.pas_ctx, mdt, fwname, NULL);
+	} else {
+		ret = qcom_mdt_load_no_init(dev, mdt, fwname, NULL,
 					    *mem_phys, *mem_size, NULL);
-
-	memunmap(mem_va);
+	}
 err_release_fw:
 	release_firmware(mdt);
 	return ret;
@@ -237,7 +234,7 @@ int venus_boot(struct venus_core *core)
 	core->fw.mem_phys = mem_phys;
 
 	if (core->use_tz)
-		ret = qcom_pas_auth_and_reset(VENUS_PAS_ID);
+		ret = qcom_pas_prepare_and_auth_reset(core->fw.pas_ctx);
 	else
 		ret = venus_boot_no_tz(core, mem_phys, mem_size);
 
-- 
2.55.0