[PATCH 1/5] drm/amdgpu: add vcn dec software ring enabled parameter

[Alex Deucher]

On Wed, Nov 11, 2020 at 5:28 PM James Zhu <James.Zhu at amd.com> wrote:
>
> This allows us to enable dec software ring feature on VCN.
> The default is 0 for all asics, and it is only valid for
> asics with vcn3.0 and above.
>
> Signed-off-by: James Zhu <James.Zhu at amd.com>
> Reviewed-by: Leo Liu <leo.liu at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu.h     | 1 +
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 8 ++++++++
>  2 files changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index 20400ec..cc47da6 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -209,6 +209,7 @@ extern int amdgpu_si_support;
>  extern int amdgpu_cik_support;
>  #endif
>  extern int amdgpu_num_kcq;
> +extern int amdgpu_dec_sw_ring_enabled;
>
>  #define AMDGPU_VM_MAX_NUM_CTX                  4096
>  #define AMDGPU_SG_THRESHOLD                    (256*1024*1024)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 999f84d..570088f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -160,6 +160,7 @@ int amdgpu_force_asic_type = -1;
>  int amdgpu_tmz;
>  int amdgpu_reset_method = -1; /* auto */
>  int amdgpu_num_kcq = -1;
> +int amdgpu_dec_sw_ring_enabled;
>
>  struct amdgpu_mgpu_info mgpu_info = {
>         .mutex = __MUTEX_INITIALIZER(mgpu_info.mutex),
> @@ -806,6 +807,13 @@ module_param_named(bad_page_threshold, amdgpu_bad_page_threshold, int, 0444);
>  MODULE_PARM_DESC(num_kcq, "number of kernel compute queue user want to setup (8 if set to greater than 8 or less than 0, only affect gfx 8+)");
>  module_param_named(num_kcq, amdgpu_num_kcq, int, 0444);
>
> +/**
> + * DOC: dec_sw_ring_enabled (uint)
> + * Override vcn decode software ring features enabled.
> + */
> +MODULE_PARM_DESC(dec_sw_ring_enabled, "vcn dec sw ring support (1 = enable, 0 = disable (default))");
> +module_param_named(dec_sw_ring_enabled, amdgpu_dec_sw_ring_enabled, int, 0444);

How about just vcn_sw_ring as the parameter name?

> +
>  static const struct pci_device_id pciidlist[] = {
>  #ifdef  CONFIG_DRM_AMDGPU_SI
>         {0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI},
> --
> 2.7.4
>
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