[Intel-gfx] [PATCH v3 20/28] drm/i915/dg1: Update comp master/slave relationships for PHYs

[Srivatsa, Anusha]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Lucas De Marchi
> Sent: Thursday, July 2, 2020 5:24 AM
> To: intel-gfx at lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v3 20/28] drm/i915/dg1: Update comp
> master/slave relationships for PHYs
> 
> From: Matt Roper <matthew.d.roper at intel.com>
> 
> As with RKL, DG1's PHY C acts as a comp master for PHY D.
> 
> Bspec: 49291
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_combo_phy.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c
> b/drivers/gpu/drm/i915/display/intel_combo_phy.c
> index 8604d4392e6a..2fad4871d4e6 100644
> --- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
> @@ -243,14 +243,14 @@ static bool phy_is_master(struct
> drm_i915_private *dev_priv, enum phy phy)
>  	 *
>  	 * ICL,TGL:
>  	 *   A(master) -> B(slave), C(slave)
> -	 * RKL:
> +	 * RKL,DG1:
>  	 *   A(master) -> B(slave)
>  	 *   C(master) -> D(slave)
>  	 *
>  	 * We must set the IREFGEN bit for any PHY acting as a master
>  	 * to another PHY.
>  	 */
> -	if (IS_ROCKETLAKE(dev_priv) && phy == PHY_C)
> +	if ((IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv)) && phy ==
> PHY_C)
>  		return true;
> 
>  	return phy == PHY_A;
> --
> 2.26.2
> 
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