On 2019-10-18 at 17:41:23 -0700, José Roberto de Souza wrote:
> Check if DMC is fused off and handle it.
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Martin Peres <martin.peres@xxxxxxxxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
Looks good to me.
Reviewed-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_device_info.c | 3 +++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 31375ddc2b3b..84fca4f3af5a 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7660,6 +7660,7 @@ enum {
> #define SKL_DFSM_CDCLK_LIMIT_540 (1 << 23)
> #define SKL_DFSM_CDCLK_LIMIT_450 (2 << 23)
> #define SKL_DFSM_CDCLK_LIMIT_337_5 (3 << 23)
> +#define ICL_DFSM_DMC_DISABLE (1 << 23)
> #define SKL_DFSM_PIPE_A_DISABLE (1 << 30)
> #define SKL_DFSM_PIPE_B_DISABLE (1 << 21)
> #define SKL_DFSM_PIPE_C_DISABLE (1 << 28)
> diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
> index b6a9f527f8f9..97d962944e48 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.c
> +++ b/drivers/gpu/drm/i915/intel_device_info.c
> @@ -993,6 +993,9 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
>
> if (dfsm & SKL_DFSM_DISPLAY_PM_DISABLE)
> info->display.has_fbc = 0;
> +
> + if (INTEL_GEN(dev_priv) >= 11 && (dfsm & ICL_DFSM_DMC_DISABLE))
> + info->display.has_csr = 0;
> }
>
> /* Initialize slice/subslice/EU info */
> --
> 2.23.0
>
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