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d="scan'208";a="305345950" Received: from irsmsx601.ger.corp.intel.com ([163.33.146.7]) by orsmga003.jf.intel.com with ESMTP; 23 Sep 2020 04:37:25 -0700 Received: from bgsmsx602.gar.corp.intel.com (10.109.78.81) by irsmsx601.ger.corp.intel.com (163.33.146.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Wed, 23 Sep 2020 12:37:23 +0100 Received: from bgsmsx602.gar.corp.intel.com ([10.109.78.81]) by BGSMSX602.gar.corp.intel.com ([10.109.78.81]) with mapi id 15.01.1713.004; Wed, 23 Sep 2020 17:07:22 +0530 From: "Kulkarni, Vandita" To: =?iso-8859-1?Q?Ville_Syrj=E4l=E4?= Thread-Topic: [V13 5/5] drm/i915/dsi: Enable software vblank counter Thread-Index: AQHWkOd8eMFB3K76OUOlFAnigQ7elal1on2AgABfqkD//6pFAIAAao9A Date: Wed, 23 Sep 2020 11:37:22 +0000 Message-ID: References: <20200922134426.9840-1-vandita.kulkarni@intel.com> <20200922134426.9840-6-vandita.kulkarni@intel.com> <20200923095939.GB6112@intel.com> <28ae2dd8415448fd90f0f2ee6c40130d@intel.com> <20200923103512.GF6112@intel.com> In-Reply-To: <20200923103512.GF6112@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 x-originating-ip: [10.223.10.1] MIME-Version: 1.0 Subject: Re: [Intel-gfx] [V13 5/5] drm/i915/dsi: Enable software vblank counter 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: "Nikula, Jani" , "intel-gfx@lists.freedesktop.org" Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" > -----Original Message----- > From: Ville Syrj=E4l=E4 > Sent: Wednesday, September 23, 2020 4:05 PM > To: Kulkarni, Vandita > Cc: intel-gfx@lists.freedesktop.org; Nikula, Jani > Subject: Re: [V13 5/5] drm/i915/dsi: Enable software vblank counter > = > On Wed, Sep 23, 2020 at 10:16:05AM +0000, Kulkarni, Vandita wrote: > > > -----Original Message----- > > > From: Ville Syrj=E4l=E4 > > > Sent: Wednesday, September 23, 2020 3:30 PM > > > To: Kulkarni, Vandita > > > Cc: intel-gfx@lists.freedesktop.org; Nikula, Jani > > > > > > Subject: Re: [V13 5/5] drm/i915/dsi: Enable software vblank counter > > > > > > On Tue, Sep 22, 2020 at 07:14:26PM +0530, Vandita Kulkarni wrote: > > > > In case of DSI cmd mode, we get hw vblank counter updated after > > > > the TE comes in, if we try to read the hw vblank counter in te > > > > handler we wouldnt have the udpated vblank counter yet. > > > > This will lead to a state where we would send the vblank event to > > > > the user space in the next te, though the frame update would have > > > > completed in the first TE duration itself. > > > > Hence switch to using software timestamp based vblank counter. > > > > > > > > Signed-off-by: Vandita Kulkarni > > > > --- > > > > drivers/gpu/drm/i915/display/intel_display.c | 11 +++++++++++ > > > > drivers/gpu/drm/i915/i915_irq.c | 4 ++++ > > > > 2 files changed, 15 insertions(+) > > > > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c > > > > b/drivers/gpu/drm/i915/display/intel_display.c > > > > index c4f331f2af45..8b9e59e52708 100644 > > > > --- a/drivers/gpu/drm/i915/display/intel_display.c > > > > +++ b/drivers/gpu/drm/i915/display/intel_display.c > > > > @@ -1808,6 +1808,17 @@ enum pipe intel_crtc_pch_transcoder(struct > > > > intel_crtc *crtc) static u32 intel_crtc_max_vblank_count(const > > > > struct intel_crtc_state *crtc_state) { > > > > struct drm_i915_private *dev_priv =3D > > > > to_i915(crtc_state->uapi.crtc->dev); > > > > + struct intel_crtc *crtc =3D to_intel_crtc(crtc_state->uapi.crtc); > > > > + u32 flags =3D crtc->mode_flags; > > > > > > That's wrong. You need to look at the crtc_state instead. > > > > Thanks, > > I will use crtc_state. > = > I'd also frop the 'flags' variable. Single use so not much point. > Or at the very least call it 'mode_flags' so we know what it actually is. Ok, will use mode_flags. Thanks, Vandita > = > -- > Ville Syrj=E4l=E4 > Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx