Originally, component frameworks were used to bind multiple GPU cores to a
virtual master. But there are chips that have only one GPU core integrated.
The component framework can be avoided under some circumstances, Another
reason is that usperspace programs such as X server and Mesa will try to
find the PCI device to use by default. Creating a virtual master device
for PCI GPUs cause unnecessary troubles.
This patch add additional code paths to allow bypassing the component
frameworks, platforms with a single GPU core could probably try the
non-component code path also. This patch is for code shaing between the
PCI driver and the platform driver.
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Signed-off-by: Sui Jingfeng <suijingfeng@xxxxxxxxxxx>
---
drivers/gpu/drm/etnaviv/etnaviv_drv.c | 47 ++++++++++-----
drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 83 +++++++++++++++++----------
drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 3 +
3 files changed, 91 insertions(+), 42 deletions(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 6a048be02857..93ca240cd4c0 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -536,10 +536,9 @@ static const struct drm_driver etnaviv_drm_driver = {
.minor = 3,
};
-/*
- * Platform driver:
- */
-static int etnaviv_bind(struct device *dev)
+static struct etnaviv_drm_private *etna_private_ptr;
+
+static int etnaviv_drm_bind(struct device *dev, bool component)
{
struct etnaviv_drm_private *priv;
struct drm_device *drm;
@@ -556,12 +555,15 @@ static int etnaviv_bind(struct device *dev)
}
drm->dev_private = priv;
+ etna_private_ptr = priv;
dma_set_max_seg_size(dev, SZ_2G);
- dev_set_drvdata(dev, drm);
+ if (component)
+ ret = component_bind_all(dev, drm);
+ else
+ ret = etnaviv_gpu_bind(dev, NULL, drm);
- ret = component_bind_all(dev, drm);
if (ret < 0)
goto out_free_priv;
@@ -574,7 +576,10 @@ static int etnaviv_bind(struct device *dev)
return 0;
out_unbind:
- component_unbind_all(dev, drm);
+ if (component)
+ component_unbind_all(dev, drm);
+ else
+ etnaviv_gpu_unbind(dev, NULL, drm);
out_free_priv:
etnaviv_free_private(priv);
out_put:
@@ -583,14 +588,17 @@ static int etnaviv_bind(struct device *dev)
return ret;
}
-static void etnaviv_unbind(struct device *dev)
+static void etnaviv_drm_unbind(struct device *dev, bool component)
{
- struct drm_device *drm = dev_get_drvdata(dev);
- struct etnaviv_drm_private *priv = drm->dev_private;
+ struct etnaviv_drm_private *priv = etna_private_ptr;
+ struct drm_device *drm = priv->drm;
drm_dev_unregister(drm);
- component_unbind_all(dev, drm);
+ if (component)
+ component_unbind_all(dev, drm);
+ else
+ etnaviv_gpu_unbind(dev, NULL, drm);
etnaviv_free_private(priv);
@@ -599,9 +607,22 @@ static void etnaviv_unbind(struct device *dev)
drm_dev_put(drm);
}
+/*
+ * Platform driver:
+ */
+static int etnaviv_master_bind(struct device *dev)
+{
+ return etnaviv_drm_bind(dev, true);
+}
+
+static void etnaviv_master_unbind(struct device *dev)
+{
+ return etnaviv_drm_unbind(dev, true);
+}
+
static const struct component_master_ops etnaviv_master_ops = {
- .bind = etnaviv_bind,
- .unbind = etnaviv_unbind,
+ .bind = etnaviv_master_bind,
+ .unbind = etnaviv_master_unbind,
};
static int etnaviv_pdev_probe(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 5e88fa95dac2..059be8c89c5a 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1737,8 +1737,7 @@ static const struct thermal_cooling_device_ops cooling_ops = {
.set_cur_state = etnaviv_gpu_cooling_set_cur_state,
};
-static int etnaviv_gpu_bind(struct device *dev, struct device *master,
- void *data)
+int etnaviv_gpu_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
struct etnaviv_drm_private *priv = drm->dev_private;
@@ -1769,7 +1768,6 @@ static int etnaviv_gpu_bind(struct device *dev, struct device *master,
if (ret < 0)
goto out_sched;
-
gpu->drm = drm;
gpu->fence_context = dma_fence_context_alloc(1);
xa_init_flags(&gpu->user_fences, XA_FLAGS_ALLOC);
@@ -1798,8 +1796,7 @@ static int etnaviv_gpu_bind(struct device *dev, struct device *master,
return ret;
}
-static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
- void *data)
+void etnaviv_gpu_unbind(struct device *dev, struct device *master, void *data)
{
struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
@@ -1867,9 +1864,11 @@ static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
return 0;
}
-static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
+/* platform independent */
+
+static int etnaviv_gpu_driver_create(struct device *dev, void __iomem *mmio,
+ int irq, bool component, bool has_clk)
{
- struct device *dev = &pdev->dev;
struct etnaviv_gpu *gpu;
int err;
@@ -1877,24 +1876,22 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
if (!gpu)
return -ENOMEM;
- gpu->dev = &pdev->dev;
+ gpu->dev = dev;
+ gpu->mmio = mmio;
mutex_init(&gpu->lock);
mutex_init(&gpu->sched_lock);
- /* Map registers: */
- gpu->mmio = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(gpu->mmio))
- return PTR_ERR(gpu->mmio);
-
/* Get Interrupt: */
- err = etnaviv_gpu_register_irq(gpu, platform_get_irq(pdev, 0));
+ err = etnaviv_gpu_register_irq(gpu, irq);
if (err)
return err;
/* Get Clocks: */
- err = etnaviv_gpu_clk_get(gpu);
- if (err)
- return err;
+ if (has_clk) {
+ err = etnaviv_gpu_clk_get(gpu);
+ if (err)
+ return err;
+ }
/* TODO: figure out max mapped size */
dev_set_drvdata(dev, gpu);
@@ -1904,24 +1901,27 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
* autosuspend delay is rather arbitary: no measurements have
* yet been performed to determine an appropriate value.
*/
- pm_runtime_use_autosuspend(gpu->dev);
- pm_runtime_set_autosuspend_delay(gpu->dev, 200);
- pm_runtime_enable(gpu->dev);
-
- err = component_add(&pdev->dev, &gpu_ops);
- if (err < 0) {
- dev_err(&pdev->dev, "failed to register component: %d\n", err);
- return err;
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_autosuspend_delay(dev, 200);
+ pm_runtime_enable(dev);
+
+ if (component) {
+ err = component_add(dev, &gpu_ops);
+ if (err < 0) {
+ dev_err(dev, "failed to register component: %d\n", err);
+ return err;
+ }
}
return 0;
}
-static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
+static void etnaviv_gpu_driver_destroy(struct device *dev, bool component)
{
- component_del(&pdev->dev, &gpu_ops);
- pm_runtime_disable(&pdev->dev);
- return 0;
+ if (component)
+ component_del(dev, &gpu_ops);
+
+ pm_runtime_disable(dev);
}
static int etnaviv_gpu_rpm_suspend(struct device *dev)
@@ -1971,6 +1971,31 @@ static const struct dev_pm_ops etnaviv_gpu_pm_ops = {
RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, NULL)
};
+static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ void __iomem *mmio;
+ int irq;
+
+ /* Map registers: */
+ mmio = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(mmio))
+ return PTR_ERR(mmio);
+
+ irq = platform_get_irq(pdev, 0);
+
+ return etnaviv_gpu_driver_create(dev, mmio, irq, true, true);
+}
+
+static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+
+ etnaviv_gpu_driver_destroy(dev, true);
+
+ return 0;
+}
+
struct platform_driver etnaviv_gpu_driver = {
.driver = {
.name = "etnaviv-gpu",
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 98c6f9c320fc..1ec829a649b5 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -206,6 +206,9 @@ void etnaviv_gpu_pm_put(struct etnaviv_gpu *gpu);
int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms);
void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch);
+int etnaviv_gpu_bind(struct device *dev, struct device *master, void *data);
+void etnaviv_gpu_unbind(struct device *dev, struct device *master, void *data);
+
extern struct platform_driver etnaviv_gpu_driver;
#endif /* __ETNAVIV_GPU_H__ */
--
2.25.1
