[PATCH v12 3/5] venus: firmware: register separate platform_device for firmware loader

Vikash Garodia
2018-10-17T13:18:21Z

From: Stanimir Varbanov <stanimir.varbanov@linaro.org>

This registers a firmware platform_device and associate it with
video-firmware DT subnode. Then calls dma configure to initialize
dma and iommu.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
drivers/media/platform/qcom/venus/core.c | 14 +++++--
drivers/media/platform/qcom/venus/core.h | 3 ++
drivers/media/platform/qcom/venus/firmware.c | 55 ++++++++++++++++++++++++++++
drivers/media/platform/qcom/venus/firmware.h | 2 +
4 files changed, 70 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 75b9785..440f25f 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -284,6 +284,14 @@ static int venus_probe(struct platform_device *pdev)
if (ret < 0)
goto err_runtime_disable;

+ ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
+ if (ret)
+ goto err_runtime_disable;
+
+ ret = venus_firmware_init(core);
+ if (ret)
+ goto err_runtime_disable;
+
ret = venus_boot(core);
if (ret)
goto err_runtime_disable;
@@ -308,10 +316,6 @@ static int venus_probe(struct platform_device *pdev)
if (ret)
goto err_core_deinit;

- ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
- if (ret)
- goto err_dev_unregister;
-
ret = pm_runtime_put_sync(dev);
if (ret)
goto err_dev_unregister;
@@ -347,6 +351,8 @@ static int venus_remove(struct platform_device *pdev)
venus_shutdown(dev);
of_platform_depopulate(dev);

+ venus_firmware_deinit(core);
+
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 8b85dc8..c629666 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -131,6 +131,9 @@ struct venus_core {
struct device *dev_dec;
struct device *dev_enc;
unsigned int use_tz;
+ struct video_firmware {
+ struct device *dev;
+ } fw;
struct mutex lock;
struct list_head instances;
atomic_t insts_count;
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 1d4f066..98b3b16 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -18,6 +18,8 @@
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
#include <linux/qcom_scm.h>
#include <linux/sizes.h>
#include <linux/soc/qcom/mdt_loader.h>
@@ -144,3 +146,56 @@ int venus_shutdown(struct device *dev)
{
return qcom_scm_pas_shutdown(VENUS_PAS_ID);
}
+
+int venus_firmware_init(struct venus_core *core)
+{
+ struct platform_device_info info;
+ struct platform_device *pdev;
+ struct device_node *np;
+ int ret;
+
+ np = of_get_child_by_name(core->dev->of_node, "video-firmware");
+ if (!np) {
+ core->use_tz = true;
+ return 0;
+ }
+
+ memset(&info, 0, sizeof(info));
+ info.fwnode = &np->fwnode;
+ info.parent = core->dev;
+ info.name = np->name;
+ info.dma_mask = DMA_BIT_MASK(32);
+
+ pdev = platform_device_register_full(&info);
+ if (IS_ERR(pdev)) {
+ of_node_put(np);
+ return PTR_ERR(pdev);
+ }
+
+ pdev->dev.of_node = np;
+
+ ret = of_dma_configure(&pdev->dev, np, true);
+ if (ret) {
+ dev_err(core->dev, "dma configure fail\n");
+ goto err_unregister;
+ }
+
+ core->fw.dev = &pdev->dev;
+
+ of_node_put(np);
+
+ return 0;
+
+err_unregister:
+ platform_device_unregister(pdev);
+ of_node_put(np);
+ return ret;
+}
+
+void venus_firmware_deinit(struct venus_core *core)
+{
+ if (!core->fw.dev)
+ return;
+
+ platform_device_unregister(to_platform_device(core->fw.dev));
+}
diff --git a/drivers/media/platform/qcom/venus/firmware.h b/drivers/media/platform/qcom/venus/firmware.h
index 1343747..fd7edf0 100644
--- a/drivers/media/platform/qcom/venus/firmware.h
+++ b/drivers/media/platform/qcom/venus/firmware.h
@@ -16,6 +16,8 @@

struct device;

+int venus_firmware_init(struct venus_core *core);
+void venus_firmware_deinit(struct venus_core *core);
int venus_boot(struct venus_core *core);
int venus_shutdown(struct device *dev);
int venus_set_hw_state(struct venus_core *core, bool suspend);