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(HELO intel.com) ([10.223.74.178]) by FMSMGA003.fm.intel.com with ESMTP; 02 Jun 2020 05:17:29 -0700 Date: Tue, 2 Jun 2020 17:36:34 +0530 From: Anshuman Gupta To: "Shankar, Uma" Message-ID: <20200602120633.GM4452@intel.com> References: <20200601101516.21018-1-anshuman.gupta@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Subject: Re: [Intel-gfx] [RFC] drm/i915: lpsp with hdmi/dp outputs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "intel-gfx@lists.freedesktop.org" , "stable@vger.kernel.org" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" T24gMjAyMC0wNi0wMSBhdCAxODoxOTo0NCArMDUzMCwgU2hhbmthciwgVW1hIHdyb3RlOgo+IAo+ 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); Tue, 2 Jun 2020 08:17:46 -0400 Received: from mga01.intel.com ([192.55.52.88]:4838 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725958AbgFBMRq (ORCPT ); Tue, 2 Jun 2020 08:17:46 -0400 IronPort-SDR: r5MqEknFE+1D5ozB3gE8ZIUcM3+30wgcm4QE5DEKy1M3Y/FDPrqzXbmvqpXeaBMHp8z7/IE4xg hE52h19KceLg== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2020 05:17:31 -0700 IronPort-SDR: /YCIvY6Q6bFBD48Ibm2cIdNeW7MWeUPdvDvdG3CAFb0EFrehnrYkF24T96v3dO2XnR47Ddb53g 7QOooRC+JW/w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,464,1583222400"; d="scan'208";a="312268285" Received: from unknown (HELO intel.com) ([10.223.74.178]) by FMSMGA003.fm.intel.com with ESMTP; 02 Jun 2020 05:17:29 -0700 Date: Tue, 2 Jun 2020 17:36:34 +0530 From: Anshuman Gupta To: "Shankar, Uma" Cc: "intel-gfx@lists.freedesktop.org" , "stable@vger.kernel.org" Subject: Re: [Intel-gfx] [RFC] drm/i915: lpsp with hdmi/dp outputs Message-ID: <20200602120633.GM4452@intel.com> References: <20200601101516.21018-1-anshuman.gupta@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On 2020-06-01 at 18:19:44 +0530, Shankar, Uma wrote: > > > > -----Original Message----- > > From: Intel-gfx On Behalf Of > > Anshuman Gupta > > Sent: Monday, June 1, 2020 3:45 PM > > To: intel-gfx@lists.freedesktop.org > > Cc: stable@vger.kernel.org > > Subject: [Intel-gfx] [RFC] drm/i915: lpsp with hdmi/dp outputs > > > > Gen12 hw are failing to enable lpsp configuration due to PG3 was left on due to > > valid usgae count of POWER_DOMAIN_AUDIO. > > It is not required to get POWER_DOMAIN_AUDIO ref-count when enabling a crtc, > > it should be always i915_audio_component request to get/put > > AUDIO_POWER_DOMAIN. > > > > Cc: stable@vger.kernel.org > > Cc: Ville Syrjälä > > Cc: Maarten Lankhorst > > Signed-off-by: Anshuman Gupta > > --- > > drivers/gpu/drm/i915/display/intel_display.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c > > b/drivers/gpu/drm/i915/display/intel_display.c > > index 6c3b11de2daf..f31a579d7a52 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display.c > > +++ b/drivers/gpu/drm/i915/display/intel_display.c > > @@ -7356,7 +7356,11 @@ static u64 get_crtc_power_domains(struct > > intel_crtc_state *crtc_state) > > mask |= BIT_ULL(intel_encoder->power_domain); > > } > > > > - if (HAS_DDI(dev_priv) && crtc_state->has_audio) > > + /* > > + * Gen12 can drive lpsp on hdmi/dp outpus, it doesn't require to > > + * enable AUDIO power in order to enable a crtc. > > + */ > > + if (INTEL_GEN(dev_priv) < 12 && HAS_DDI(dev_priv) && > > +crtc_state->has_audio) > > mask |= BIT_ULL(POWER_DOMAIN_AUDIO); > > As part of ddi_get_config we determine has_audio using power well enabled: > pipe_config->has_audio = > intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder); IMO AUDIO power will also be requested by i915_audio_component get request, we can always use HDMI display without audio playback, AUDIO power should be enabled when audio driver request for it. if we get AUDIO_POWER_DOMAIN while enabling crtc PG3 will always kept on till CRTC is disabled, that is the issue required to be addressed here. This is just RFC to initiate a discussion around it. Thanks, Anshuman Gupta. > > If audio power domain is not enabled, we may end up with this as false. > Later this may get checked in intel_enable_ddi_hdmi to call audio codec enable > > if (crtc_state->has_audio) > intel_audio_codec_enable(encoder, crtc_state, conn_state); > > This may cause detection to fail. Please verify this usecase once and confirm. > > Regards, > Uma Shankar > > > if (crtc_state->shared_dpll) > > -- > > 2.26.2 > > > > _______________________________________________ > > Intel-gfx mailing list > > Intel-gfx@lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx