From: Tomasz Jankowski <tomasz1.jankowski@xxxxxxxxx>
Get the hardware information from register MMIO_IBUFFS
Signed-off-by: Tomasz Jankowski <tomasz1.jankowski@xxxxxxxxx>
Tested-by: Mikolaj Grzybowski <mikolajx.grzybowski@xxxxxxxxx>
Co-developed-by: Jianxun Zhang <jianxun.zhang@xxxxxxxxxxxxxxx>
Signed-off-by: Jianxun Zhang <jianxun.zhang@xxxxxxxxxxxxxxx>
Co-developed-by: Maciej Kwapulinski <maciej.kwapulinski@xxxxxxxxxxxxxxx>
Signed-off-by: Maciej Kwapulinski <maciej.kwapulinski@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/gna/gna_device.c | 4 ++++
drivers/gpu/drm/gna/gna_device.h | 9 +++++++++
drivers/gpu/drm/gna/gna_hw.h | 7 +++++++
3 files changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/gna/gna_device.c b/drivers/gpu/drm/gna/gna_device.c
index b8620b7da205..1f357221a603 100644
--- a/drivers/gpu/drm/gna/gna_device.c
+++ b/drivers/gpu/drm/gna/gna_device.c
@@ -42,6 +42,7 @@ int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem
{
struct gna_device *gna_priv;
struct drm_device *drm_dev;
+ u32 bld_reg;
int err;
gna_priv = devm_drm_dev_alloc(parent, &gna_drm_driver, struct gna_device, drm);
@@ -59,6 +60,9 @@ int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem
return err;
}
+ bld_reg = gna_reg_read(gna_priv, GNA_MMIO_IBUFFS);
+ gna_priv->hw_info.in_buf_s = bld_reg & GENMASK(7, 0);
+
dev_set_drvdata(parent, drm_dev);
err = gna_drm_dev_init(drm_dev);
diff --git a/drivers/gpu/drm/gna/gna_device.h b/drivers/gpu/drm/gna/gna_device.h
index d269f7da5c5e..e42f167b62a0 100644
--- a/drivers/gpu/drm/gna/gna_device.h
+++ b/drivers/gpu/drm/gna/gna_device.h
@@ -6,6 +6,9 @@
#include <drm/drm_device.h>
+#include <linux/io.h>
+#include <linux/types.h>
+
#include "gna_hw.h"
#define DRIVER_NAME "gna"
@@ -24,7 +27,13 @@ struct gna_device {
/* device related resources */
void __iomem *iobase;
struct gna_dev_info info;
+ struct gna_hw_info hw_info;
};
int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem *iobase);
+static inline u32 gna_reg_read(struct gna_device *gna_priv, u32 reg)
+{
+ return readl(gna_priv->iobase + reg);
+}
+
#endif /* __GNA_DEVICE_H__ */
diff --git a/drivers/gpu/drm/gna/gna_hw.h b/drivers/gpu/drm/gna/gna_hw.h
index 3ca801096fd1..e858b76606fc 100644
--- a/drivers/gpu/drm/gna/gna_hw.h
+++ b/drivers/gpu/drm/gna/gna_hw.h
@@ -6,6 +6,13 @@
#include <linux/mm_types.h>
+/* GNA MMIO registers */
+#define GNA_MMIO_IBUFFS 0xB4
+
+struct gna_hw_info {
+ u8 in_buf_s;
+};
+
struct gna_dev_info {
u32 hwid;
u32 num_pagetables;
--
2.25.1
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