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From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Imre Deak <imre.deak@intel.com>
Cc: intel-gfx@lists.freedesktop.org, stable@vger.kernel.org
Subject: Re: [Intel-gfx] [PATCH] drm/i915: Fix AUX power domain toggling across TypeC mode resets
Date: Fri, 15 May 2020 19:21:06 +0300	[thread overview]
Message-ID: <20200515162106.GL6112@intel.com> (raw)
In-Reply-To: <20200514204553.27193-1-imre.deak@intel.com>

On Thu, May 14, 2020 at 11:45:53PM +0300, Imre Deak wrote:
> Make sure to select the port's AUX power domain while holding the TC
> port lock. The domain depends on the port's current TC mode, which may
> get changed under us if we're not holding the lock.

Can we toss in a lockdep assert?

Did this by any chance help with the MST issues you were seeing?

> 
> This was left out from
> commit 8c10e2262663 ("drm/i915: Keep the TypeC port mode fixed for detect/AUX transfers")
> 
> Cc: <stable@vger.kernel.org> # v5.4+
> Signed-off-by: Imre Deak <imre.deak@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 408c3c1c5e81..40d42dcff0b7 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1359,8 +1359,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	bool is_tc_port = intel_phy_is_tc(i915, phy);
>  	i915_reg_t ch_ctl, ch_data[5];
>  	u32 aux_clock_divider;
> -	enum intel_display_power_domain aux_domain =
> -		intel_aux_power_domain(intel_dig_port);
> +	enum intel_display_power_domain aux_domain;
>  	intel_wakeref_t aux_wakeref;
>  	intel_wakeref_t pps_wakeref;
>  	int i, ret, recv_bytes;
> @@ -1375,6 +1374,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	if (is_tc_port)
>  		intel_tc_port_lock(intel_dig_port);
>  
> +	aux_domain = intel_aux_power_domain(intel_dig_port);
> +
>  	aux_wakeref = intel_display_power_get(i915, aux_domain);
>  	pps_wakeref = pps_lock(intel_dp);
>  
> -- 
> 2.23.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

WARNING: multiple messages have this Message-ID (diff)
From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Imre Deak <imre.deak@intel.com>
Cc: intel-gfx@lists.freedesktop.org, stable@vger.kernel.org
Subject: Re: [Intel-gfx] [PATCH] drm/i915: Fix AUX power domain toggling across TypeC mode resets
Date: Fri, 15 May 2020 19:21:06 +0300	[thread overview]
Message-ID: <20200515162106.GL6112@intel.com> (raw)
In-Reply-To: <20200514204553.27193-1-imre.deak@intel.com>

On Thu, May 14, 2020 at 11:45:53PM +0300, Imre Deak wrote:
> Make sure to select the port's AUX power domain while holding the TC
> port lock. The domain depends on the port's current TC mode, which may
> get changed under us if we're not holding the lock.

Can we toss in a lockdep assert?

Did this by any chance help with the MST issues you were seeing?

> 
> This was left out from
> commit 8c10e2262663 ("drm/i915: Keep the TypeC port mode fixed for detect/AUX transfers")
> 
> Cc: <stable@vger.kernel.org> # v5.4+
> Signed-off-by: Imre Deak <imre.deak@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 408c3c1c5e81..40d42dcff0b7 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -1359,8 +1359,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	bool is_tc_port = intel_phy_is_tc(i915, phy);
>  	i915_reg_t ch_ctl, ch_data[5];
>  	u32 aux_clock_divider;
> -	enum intel_display_power_domain aux_domain =
> -		intel_aux_power_domain(intel_dig_port);
> +	enum intel_display_power_domain aux_domain;
>  	intel_wakeref_t aux_wakeref;
>  	intel_wakeref_t pps_wakeref;
>  	int i, ret, recv_bytes;
> @@ -1375,6 +1374,8 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
>  	if (is_tc_port)
>  		intel_tc_port_lock(intel_dig_port);
>  
> +	aux_domain = intel_aux_power_domain(intel_dig_port);
> +
>  	aux_wakeref = intel_display_power_get(i915, aux_domain);
>  	pps_wakeref = pps_lock(intel_dp);
>  
> -- 
> 2.23.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel

  parent reply	other threads:[~2020-05-15 16:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-14 20:45 [Intel-gfx] [PATCH] drm/i915: Fix AUX power domain toggling across TypeC mode resets Imre Deak
2020-05-14 20:45 ` Imre Deak
2020-05-14 21:44 ` [Intel-gfx] " Souza, Jose
2020-05-14 21:44   ` Souza, Jose
2020-05-15 16:21 ` Ville Syrjälä [this message]
2020-05-15 16:21   ` Ville Syrjälä
2020-05-15 17:24   ` Imre Deak
2020-05-15 17:24     ` Imre Deak
2020-05-15 17:30     ` Ville Syrjälä
2020-05-15 17:30       ` Ville Syrjälä
2020-05-15 17:11 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
2020-05-15 17:36 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-05-15 20:36 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2020-05-19 11:32   ` Imre Deak

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