admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/panthor: Add arch-specific panthor_hw binding

Browse Source 
This patch adds the framework for binding to a specific panthor_hw
structure based on the architecture major value parsed from the GPU_ID
register. This is in preparation of enabling architecture-specific
behaviours based on GPU_ID. As such, it also splits the GPU_ID register
read operation into its own helper function.

This framework allows a single panthor_hw structure to be shared across
multiple architectures should there be minimal changes between them via
the arch_min and arch_max field of the panthor_hw_entry structure,
instead of duplicating the structure across multiple architectures.

Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Karunika Choo <karunika.choo@arm.com>
Link: https://patch.msgid.link/20251125125548.3282320-2-karunika.choo@arm.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
This commit is contained in:
Karunika Choo
2025-11-25 12:55:41 +00:00
committed by Boris Brezillon
parent ce04ec03a9
commit b1075ae1a3
3 changed files with 74 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/panthor/panthor_device.h
View File

@@ -24,6 +24,7 @@ struct panthor_device;
struct panthor_gpu;
struct panthor_group_pool;
struct panthor_heap_pool;
struct panthor_hw;
struct panthor_job;
struct panthor_mmu;
struct panthor_fw;
@@ -134,6 +135,9 @@ struct panthor_device {
/** @csif_info: Command stream interface information. */
struct drm_panthor_csif_info csif_info;
/** @hw: GPU-specific data. */
struct panthor_hw *hw;
/** @gpu: GPU management data. */
struct panthor_gpu *gpu;

65
drivers/gpu/drm/panthor/panthor_hw.c
View File

@@ -10,6 +10,28 @@
#define GPU_PROD_ID_MAKE(arch_major, prod_major) \
(((arch_major) << 24) | (prod_major))
/** struct panthor_hw_entry - HW arch major to panthor_hw binding entry */
struct panthor_hw_entry {
/** @arch_min: Minimum supported architecture major value (inclusive) */
u8 arch_min;
/** @arch_max: Maximum supported architecture major value (inclusive) */
u8 arch_max;
/** @hwdev: Pointer to panthor_hw structure */
struct panthor_hw *hwdev;
};
static struct panthor_hw panthor_hw_arch_v10 = {};
static struct panthor_hw_entry panthor_hw_match[] = {
{
.arch_min = 10,
.arch_max = 13,
.hwdev = &panthor_hw_arch_v10,
},
};
static char *get_gpu_model_name(struct panthor_device *ptdev)
{
const u32 gpu_id = ptdev->gpu_info.gpu_id;
@@ -64,7 +86,6 @@ static void panthor_gpu_info_init(struct panthor_device *ptdev)
{
unsigned int i;
ptdev->gpu_info.gpu_id = gpu_read(ptdev, GPU_ID);
ptdev->gpu_info.csf_id = gpu_read(ptdev, GPU_CSF_ID);
ptdev->gpu_info.gpu_rev = gpu_read(ptdev, GPU_REVID);
ptdev->gpu_info.core_features = gpu_read(ptdev, GPU_CORE_FEATURES);
@@ -119,8 +140,50 @@ static void panthor_hw_info_init(struct panthor_device *ptdev)
ptdev->gpu_info.tiler_present);
}
static int panthor_hw_bind_device(struct panthor_device *ptdev)
{
struct panthor_hw *hdev = NULL;
const u32 arch_major = GPU_ARCH_MAJOR(ptdev->gpu_info.gpu_id);
int i = 0;
for (i = 0; i < ARRAY_SIZE(panthor_hw_match); i++) {
struct panthor_hw_entry *entry = &panthor_hw_match[i];
if (arch_major >= entry->arch_min && arch_major <= entry->arch_max) {
hdev = entry->hwdev;
break;
}
}
if (!hdev)
return -EOPNOTSUPP;
ptdev->hw = hdev;
return 0;
}
static int panthor_hw_gpu_id_init(struct panthor_device *ptdev)
{
ptdev->gpu_info.gpu_id = gpu_read(ptdev, GPU_ID);
if (!ptdev->gpu_info.gpu_id)
return -ENXIO;
return 0;
}
int panthor_hw_init(struct panthor_device *ptdev)
{
int ret = 0;
ret = panthor_hw_gpu_id_init(ptdev);
if (ret)
return ret;
ret = panthor_hw_bind_device(ptdev);
if (ret)
return ret;
panthor_hw_info_init(ptdev);
return 0;

6
drivers/gpu/drm/panthor/panthor_hw.h
View File

@@ -6,6 +6,12 @@
struct panthor_device;
/**
* struct panthor_hw - GPU specific register mapping and functions
*/
struct panthor_hw {
};
int panthor_hw_init(struct panthor_device *ptdev);
#endif /* __PANTHOR_HW_H__ */