linux-kernel - Re: [Intel-gfx] [PATCH v7 05/15] drm/i915/gsc: add GSC XeHP SDV platform definition

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Message-ID: <6009c921-0133-f83b-fbce-1c5ee55cb733@intel.com>
Date:   Thu, 1 Sep 2022 08:31:39 -0700
From:   "Ceraolo Spurio, Daniele" <daniele.ceraolospurio@...el.com>
To:     Tomas Winkler <tomas.winkler@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
CC:     <intel-gfx@...ts.freedesktop.org>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        <linux-kernel@...r.kernel.org>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>
Subject: Re: [Intel-gfx] [PATCH v7 05/15] drm/i915/gsc: add GSC XeHP SDV
 platform definition



On 8/6/2022 5:26 AM, Tomas Winkler wrote:
> From: Alexander Usyskin <alexander.usyskin@...el.com>
>
> Define GSC on XeHP SDV (Intel(R) dGPU without display)
>
> XeHP SDV uses the same hardware settings as DG1, but uses polling
> instead of interrupts and runs the firmware in slow pace due to
> hardware limitations.
>
> Signed-off-by: Vitaly Lubart <vitaly.lubart@...el.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>

Daniele

> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 15 +++++++++++++++
>   1 file changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index 73498c2574c8..e1040c8f2fd3 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -56,6 +56,19 @@ static const struct gsc_def gsc_def_dg1[] = {
>   	}
>   };
>   
> +static const struct gsc_def gsc_def_xehpsdv[] = {
> +	{
> +		/* HECI1 not enabled on the device. */
> +	},
> +	{
> +		.name = "mei-gscfi",
> +		.bar = DG1_GSC_HECI2_BASE,
> +		.bar_size = GSC_BAR_LENGTH,
> +		.use_polling = true,
> +		.slow_firmware = true,
> +	}
> +};
> +
>   static const struct gsc_def gsc_def_dg2[] = {
>   	{
>   		.name = "mei-gsc",
> @@ -107,6 +120,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   
>   	if (IS_DG1(i915)) {
>   		def = &gsc_def_dg1[intf_id];
> +	} else if (IS_XEHPSDV(i915)) {
> +		def = &gsc_def_xehpsdv[intf_id];
>   	} else if (IS_DG2(i915)) {
>   		def = &gsc_def_dg2[intf_id];
>   	} else {