We'll need to initialize the HVS structure without a backing device to
create a mock we'll use for testing.
Split the structure initialization part into a separate function.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_drv.h | 1 +
drivers/gpu/drm/vc4/vc4_hvs.c | 81 +++++++++++++++++++++++++------------------
2 files changed, 48 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 54352db48476..e0be7a81a24a 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -1009,6 +1009,7 @@ void vc4_irq_reset(struct drm_device *dev);
/* vc4_hvs.c */
extern struct platform_driver vc4_hvs_driver;
+struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pdev);
void vc4_hvs_stop_channel(struct vc4_hvs *hvs, unsigned int output);
int vc4_hvs_get_fifo_from_output(struct vc4_hvs *hvs, unsigned int output);
u8 vc4_hvs_get_fifo_frame_count(struct vc4_hvs *hvs, unsigned int fifo);
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index c4453a5ae163..94c29f8547bb 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -768,22 +768,60 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor)
return 0;
}
-static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
+struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct drm_device *drm = dev_get_drvdata(master);
- struct vc4_dev *vc4 = to_vc4_dev(drm);
- struct vc4_hvs *hvs = NULL;
- int ret;
- u32 dispctrl;
- u32 reg;
+ struct drm_device *drm = &vc4->base;
+ struct vc4_hvs *hvs;
hvs = drmm_kzalloc(drm, sizeof(*hvs), GFP_KERNEL);
if (!hvs)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
+
hvs->vc4 = vc4;
hvs->pdev = pdev;
+ spin_lock_init(&hvs->mm_lock);
+
+ /* Set up the HVS display list memory manager. We never
+ * overwrite the setup from the bootloader (just 128b out of
+ * our 16K), since we don't want to scramble the screen when
+ * transitioning from the firmware's boot setup to runtime.
+ */
+ drm_mm_init(&hvs->dlist_mm,
+ HVS_BOOTLOADER_DLIST_END,
+ (SCALER_DLIST_SIZE >> 2) - HVS_BOOTLOADER_DLIST_END);
+
+ /* Set up the HVS LBM memory manager. We could have some more
+ * complicated data structure that allowed reuse of LBM areas
+ * between planes when they don't overlap on the screen, but
+ * for now we just allocate globally.
+ */
+ if (!vc4->is_vc5)
+ /* 48k words of 2x12-bit pixels */
+ drm_mm_init(&hvs->lbm_mm, 0, 48 * 1024);
+ else
+ /* 60k words of 4x12-bit pixels */
+ drm_mm_init(&hvs->lbm_mm, 0, 60 * 1024);
+
+ vc4->hvs = hvs;
+
+ return hvs;
+}
+
+static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm = dev_get_drvdata(master);
+ struct vc4_dev *vc4 = to_vc4_dev(drm);
+ struct vc4_hvs *hvs = NULL;
+ int ret;
+ u32 dispctrl;
+ u32 reg;
+
+ hvs = __vc4_hvs_alloc(vc4, NULL);
+ if (IS_ERR(hvs))
+ return PTR_ERR(hvs);
+
hvs->regs = vc4_ioremap_regs(pdev, 0);
if (IS_ERR(hvs->regs))
return PTR_ERR(hvs->regs);
@@ -835,29 +873,6 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
else
hvs->dlist = hvs->regs + SCALER5_DLIST_START;
- spin_lock_init(&hvs->mm_lock);
-
- /* Set up the HVS display list memory manager. We never
- * overwrite the setup from the bootloader (just 128b out of
- * our 16K), since we don't want to scramble the screen when
- * transitioning from the firmware's boot setup to runtime.
- */
- drm_mm_init(&hvs->dlist_mm,
- HVS_BOOTLOADER_DLIST_END,
- (SCALER_DLIST_SIZE >> 2) - HVS_BOOTLOADER_DLIST_END);
-
- /* Set up the HVS LBM memory manager. We could have some more
- * complicated data structure that allowed reuse of LBM areas
- * between planes when they don't overlap on the screen, but
- * for now we just allocate globally.
- */
- if (!vc4->is_vc5)
- /* 48k words of 2x12-bit pixels */
- drm_mm_init(&hvs->lbm_mm, 0, 48 * 1024);
- else
- /* 60k words of 4x12-bit pixels */
- drm_mm_init(&hvs->lbm_mm, 0, 60 * 1024);
-
/* Upload filter kernels. We only have the one for now, so we
* keep it around for the lifetime of the driver.
*/
@@ -867,8 +882,6 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
if (ret)
return ret;
- vc4->hvs = hvs;
-
reg = HVS_READ(SCALER_DISPECTRL);
reg &= ~SCALER_DISPECTRL_DSP2_MUX_MASK;
HVS_WRITE(SCALER_DISPECTRL,
--
2.38.1-b4-0.11.0-dev-d416f
