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12 Mar 2021 15:03:38 -0800 Received: from fmsmsx612.amr.corp.intel.com (10.18.126.92) by fmsmsx603.amr.corp.intel.com (10.18.126.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Mar 2021 15:03:38 -0800 Received: from fmsmsx611.amr.corp.intel.com (10.18.126.91) by fmsmsx612.amr.corp.intel.com (10.18.126.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Mar 2021 15:03:37 -0800 Received: from fmsmsx611.amr.corp.intel.com ([10.18.126.91]) by fmsmsx611.amr.corp.intel.com ([10.18.126.91]) with mapi id 15.01.2106.013; Fri, 12 Mar 2021 15:03:37 -0800 From: "Srivatsa, Anusha" To: "Roper, Matthew D" , "intel-gfx@lists.freedesktop.org" Thread-Topic: [Intel-gfx] [PATCH 16/56] drm/i915/xelpd: Required bandwidth increases when VT-d is active Thread-Index: AQHXFscQeOuFBbtvyUGWqVmzaw5LGKqA+jBw Date: Fri, 12 Mar 2021 23:03:37 +0000 Message-ID: <9d0ccae417204a78aa0d2c43694e73a1@intel.com> References: <20210311223632.3191939-1-matthew.d.roper@intel.com> <20210311223632.3191939-17-matthew.d.roper@intel.com> In-Reply-To: <20210311223632.3191939-17-matthew.d.roper@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-version: 11.5.1.3 dlp-product: dlpe-windows dlp-reaction: no-action x-originating-ip: [10.1.200.100] MIME-Version: 1.0 Subject: Re: [Intel-gfx] [PATCH 16/56] drm/i915/xelpd: Required bandwidth increases when VT-d is active 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" > -----Original Message----- > From: Intel-gfx On Behalf Of Matt > Roper > Sent: Thursday, March 11, 2021 2:36 PM > To: intel-gfx@lists.freedesktop.org > Subject: [Intel-gfx] [PATCH 16/56] drm/i915/xelpd: Required bandwidth > increases when VT-d is active > > If VT-d is active, the memory bandwidth usage of the display is 5% higher. > Take this into account when determining whether we can support a display > configuration. > > Bspec: 64631 > Cc: Matt Atwood > Signed-off-by: Matt Roper Reviewed-by: Anusha Srivatsa > --- > drivers/gpu/drm/i915/display/intel_bw.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_bw.c > b/drivers/gpu/drm/i915/display/intel_bw.c > index 20dbc3759d27..23cf9bf31e41 100644 > --- a/drivers/gpu/drm/i915/display/intel_bw.c > +++ b/drivers/gpu/drm/i915/display/intel_bw.c > @@ -344,6 +344,9 @@ static unsigned int intel_bw_data_rate(struct > drm_i915_private *dev_priv, > for_each_pipe(dev_priv, pipe) > data_rate += bw_state->data_rate[pipe]; > > + if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active()) > + data_rate = data_rate * 105 / 100; > + > return data_rate; > } > > -- > 2.25.4 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx