Re: [PATCH 2/2] drm/intel: Add quirk to disable rc6 on some TUXEDO devices

[Jani Nikula <jani.nikula@linux.intel.com>]

On Tue, 08 Sep 2026, Werner Sembach <wse@tuxedocomputers.com> wrote:
> Some TUXEDO devices have random rare hard resets during video streaming.

Is there a gitlab issue for this?

> Disabling rc6 fixes this. Until the root cause is found this is a pragmatic
> workaround.

The way to do this is to add your own local struct pci_device_id array
somewhere, and use pci_match_id() or similar on it.

We're *not* going to change the high level device info or PCI ID
definitions for this.

Ugly stuff needs to be localized and hidden away.


BR,
Jani.


>
> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
> ---
>  drivers/gpu/drm/i915/i915_pci.c | 11 +++++++++++
>  include/drm/intel/pciids.h      | 22 ++++++++++++++++++++++
>  2 files changed, 33 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 2f03f95945f1b..a52b56bedcf4f 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -687,6 +687,16 @@ static const struct intel_device_info adl_p_info = {
>  	.dma_mask_size = 39,
>  };
>  
> +static const struct intel_device_info adl_p_tux_ibp8_quirk_info = {
> +	GEN12_FEATURES,
> +	PLATFORM(INTEL_ALDERLAKE_P),
> +	.platform_engine_mask =
> +		BIT(RCS0) | BIT(BCS0) | BIT(VECS0) | BIT(VCS0) | BIT(VCS2),
> +	.__runtime.ppgtt_size = 48,
> +	.dma_mask_size = 39,
> +	.has_rc6 = 0,
> +};
> +
>  #undef GEN
>  
>  #define XE_HP_PAGE_SIZES \
> @@ -863,6 +873,7 @@ static const struct pci_device_id pciidlist[] = {
>  	INTEL_DG1_IDS(INTEL_VGA_DEVICE, &dg1_info),
>  	INTEL_RPLS_IDS(INTEL_VGA_DEVICE, &adl_s_info),
>  	INTEL_RPLU_IDS(INTEL_VGA_DEVICE, &adl_p_info),
> +	INTEL_RPLP_TUX_IBP8_QUIRK_IDS(INTEL_VGA_DEVICE, &adl_p_tux_ibp8_quirk_info),
>  	INTEL_RPLP_IDS(INTEL_VGA_DEVICE, &adl_p_info),
>  	INTEL_DG2_IDS(INTEL_VGA_DEVICE, &dg2_info),
>  	INTEL_ATS_M_IDS(INTEL_VGA_DEVICE, &ats_m_info),
> diff --git a/include/drm/intel/pciids.h b/include/drm/intel/pciids.h
> index 7a4a5658942d2..e4f74916a62c2 100644
> --- a/include/drm/intel/pciids.h
> +++ b/include/drm/intel/pciids.h
> @@ -712,6 +712,28 @@
>  	MACRO__(0xA7AC, ## __VA_ARGS__), \
>  	MACRO__(0xA7AD, ## __VA_ARGS__)
>  
> +#define INTEL_RPLP_TUX_IBP8_QUIRK_IDS(MACRO__, ...) \
> +	MACRO__##_SUB(0xA720, 0x1D05, 0x124A, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA720, 0x1D05, 0x124C, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA720, 0x1D05, 0x124E, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA720, 0x1D05, 0x130F, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A0, 0x1D05, 0x124A, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A0, 0x1D05, 0x124C, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A0, 0x1D05, 0x124E, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A0, 0x1D05, 0x130F, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A8, 0x1D05, 0x124A, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A8, 0x1D05, 0x124C, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A8, 0x1D05, 0x124E, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7A8, 0x1D05, 0x130F, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AA, 0x1D05, 0x124A, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AA, 0x1D05, 0x124C, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AA, 0x1D05, 0x124E, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AA, 0x1D05, 0x130F, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AB, 0x1D05, 0x124A, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AB, 0x1D05, 0x124C, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AB, 0x1D05, 0x124E, ## __VA_ARGS__), \
> +	MACRO__##_SUB(0xA7AB, 0x1D05, 0x130F, ## __VA_ARGS__)
> +
>  /* RPL-P */
>  #define INTEL_RPLP_IDS(MACRO__, ...) \
>  	MACRO__(0xA720, ## __VA_ARGS__), \

-- 
Jani Nikula, Intel