[PATCH v2 3/5] venus: add check to make scm calls

[Vikash Garodia <vgarodia@codeaurora.org>]

Split the boot api into firmware load and hardware
boot. Also add the checks to invoke scm calls only
if the platform has the required support.

Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>
---
 drivers/media/platform/qcom/venus/core.c     |  4 +-
 drivers/media/platform/qcom/venus/firmware.c | 65 ++++++++++++++++++----------
 drivers/media/platform/qcom/venus/firmware.h |  2 +-
 3 files changed, 45 insertions(+), 26 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 1308488..9a95f9a 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -84,7 +84,7 @@ static void venus_sys_error_handler(struct work_struct *work)
 
 	pm_runtime_get_sync(core->dev);
 
-	ret |= venus_boot(core->dev, core->res->fwname);
+	ret |= venus_boot(core);
 
 	ret |= hfi_core_resume(core, true);
 
@@ -279,7 +279,7 @@ static int venus_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto err_runtime_disable;
 
-	ret = venus_boot(dev, core->res->fwname);
+	ret = venus_boot(core);
 	if (ret)
 		goto err_runtime_disable;
 
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index b4664ed..cb7f48ef 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -81,40 +81,35 @@ int venus_set_hw_state(enum tzbsp_video_state state, struct venus_core *core)
 }
 EXPORT_SYMBOL_GPL(venus_set_hw_state);
 
-int venus_boot(struct device *dev, const char *fwname)
+static int venus_load_fw(struct device *dev, const char *fwname,
+		phys_addr_t *mem_phys, size_t *mem_size)
 {
 	const struct firmware *mdt;
 	struct device_node *node;
-	phys_addr_t mem_phys;
 	struct resource r;
 	ssize_t fw_size;
-	size_t mem_size;
 	void *mem_va;
 	int ret;
 
-	if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
-		return -EPROBE_DEFER;
-
 	node = of_parse_phandle(dev->of_node, "memory-region", 0);
 	if (!node) {
 		dev_err(dev, "no memory-region specified\n");
 		return -EINVAL;
 	}
-
 	ret = of_address_to_resource(node, 0, &r);
 	if (ret)
 		return ret;
 
-	mem_phys = r.start;
-	mem_size = resource_size(&r);
+	*mem_phys = r.start;
+	*mem_size = resource_size(&r);
 
-	if (mem_size < VENUS_FW_MEM_SIZE)
+	if (*mem_size < VENUS_FW_MEM_SIZE)
 		return -EINVAL;
 
-	mem_va = memremap(r.start, mem_size, MEMREMAP_WC);
+	mem_va = memremap(r.start, *mem_size, MEMREMAP_WC);
 	if (!mem_va) {
 		dev_err(dev, "unable to map memory region: %pa+%zx\n",
-			&r.start, mem_size);
+			&r.start, *mem_size);
 		return -ENOMEM;
 	}
 
@@ -128,25 +123,49 @@ int venus_boot(struct device *dev, const char *fwname)
 		release_firmware(mdt);
 		goto err_unmap;
 	}
-
-	ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
-			    mem_size);
+	if (qcom_scm_is_available())
+		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, VENUS_PAS_ID,
+				mem_va, *mem_phys, *mem_size, NULL);
 
 	release_firmware(mdt);
 
-	if (ret)
-		goto err_unmap;
-
-	ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
-	if (ret)
-		goto err_unmap;
-
 err_unmap:
 	memunmap(mem_va);
 	return ret;
 }
+int venus_boot(struct venus_core *core)
+{
+	phys_addr_t mem_phys;
+	size_t mem_size;
+	int ret;
+	struct device *dev;
+
+	if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER))
+		return -EPROBE_DEFER;
+
+	dev = core->dev;
+
+	ret = venus_load_fw(dev, core->res->fwname, &mem_phys, &mem_size);
+	if (ret) {
+		dev_err(dev, "fail to load video firmware\n");
+		return -EINVAL;
+	}
+
+	if (qcom_scm_is_available())
+		ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(venus_boot);
 
 int venus_shutdown(struct device *dev)
 {
-	return qcom_scm_pas_shutdown(VENUS_PAS_ID);
+	int ret = 0;
+
+	if (qcom_scm_is_available())
+		ret = qcom_scm_pas_shutdown(VENUS_PAS_ID);
+	return ret;
 }
diff --git a/drivers/media/platform/qcom/venus/firmware.h b/drivers/media/platform/qcom/venus/firmware.h
index 1336729..0916826 100644
--- a/drivers/media/platform/qcom/venus/firmware.h
+++ b/drivers/media/platform/qcom/venus/firmware.h
@@ -16,7 +16,7 @@
 
 struct device;
 
-int venus_boot(struct device *dev, const char *fwname);
+int venus_boot(struct venus_core *core);
 int venus_shutdown(struct device *dev);
 int venus_set_hw_state(enum tzbsp_video_state, struct venus_core *core);
 
-- 
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