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spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D867B6E091; Tue, 9 Jun 2020 18:56:01 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0160E6E091 for ; Tue, 9 Jun 2020 18:56:00 +0000 (UTC) IronPort-SDR: pyQf1bs39eWvMAQtsJBR6OCgY9KoJToXL8ffT2b4N6POMJKRfu5Y+7nYXh3diMxafpy0T93C1q XmDbAi1etxuw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jun 2020 11:55:59 -0700 IronPort-SDR: qB1fzVlKsQb7u/We74h8U6QWyC4gayiOnyBWQsl/A24lSMD7IqFeLBjbK0x5Mj4wvijKZkJA18 m6P1tev+HaQw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,493,1583222400"; d="scan'208";a="259067732" Received: from labuser-z97x-ud5h.jf.intel.com (HELO intel.com) ([10.165.21.211]) by fmsmga007.fm.intel.com with ESMTP; 09 Jun 2020 11:55:59 -0700 Date: Tue, 9 Jun 2020 11:56:56 -0700 From: Manasi Navare To: Imre Deak Message-ID: <20200609185656.GA26705@intel.com> References: <20200608181023.11503-1-imre.deak@intel.com> <20200609150525.GP6112@intel.com> <20200609174035.GG22647@ideak-desk.fi.intel.com> <20200609175923.GU6112@intel.com> <20200609180852.GI22647@ideak-desk.fi.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200609180852.GI22647@ideak-desk.fi.intel.com> User-Agent: Mutt/1.5.24 (2015-08-30) Subject: Re: [Intel-gfx] [PATCH] drm/i915: Fix the i915_dsc_fec_support debugfs file for DP MST connectors 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 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Tue, Jun 09, 2020 at 09:08:52PM +0300, Imre Deak wrote: > On Tue, Jun 09, 2020 at 08:59:23PM +0300, Ville Syrj=E4l=E4 wrote: > > On Tue, Jun 09, 2020 at 08:40:35PM +0300, Imre Deak wrote: > > > On Tue, Jun 09, 2020 at 06:05:25PM +0300, Ville Syrj=E4l=E4 wrote: > > > > On Mon, Jun 08, 2020 at 09:10:23PM +0300, Imre Deak wrote: > > > > > DSC is not supported on DP MST streams so just return -EINVAL when > > > > > reading/writing the i915_dsc_fec_support debugfs file for such > > > > > connectors. > > > > > = > > > > > This also fixes an OOPS, caused by the encoder->digport cast, whi= ch is > > > > > not valid for MST encoders. > > > > > = > > > > > Signed-off-by: Imre Deak > > > > > --- > > > > > .../drm/i915/display/intel_display_debugfs.c | 36 +++++++++++++= ++---- > > > > > 1 file changed, 29 insertions(+), 7 deletions(-) > > > > > = > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c= b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > > > > index 2b640d8ab9d2..ebca8e488d03 100644 > > > > > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > > > > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > > > > @@ -2094,6 +2094,8 @@ static int i915_dsc_fec_support_show(struct= seq_file *m, void *data) > > > > > drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBL= E); > > > > > = > > > > > do { > > > > > + struct intel_encoder *encoder; > > > > > + > > > > > try_again =3D false; > > > > > ret =3D drm_modeset_lock(&dev->mode_config.connection_mutex, > > > > > &ctx); > > > > > @@ -2120,8 +2122,17 @@ static int i915_dsc_fec_support_show(struc= t seq_file *m, void *data) > > > > > } else if (ret) { > > > > > break; > > > > > } > > > > > - intel_dp =3D intel_attached_dp(to_intel_connector(connector)); > > > > > + > > > > > + encoder =3D intel_attached_encoder(to_intel_connector(connecto= r)); > > > > > + /* TODO: Add DSC support for MST streams */ > > > > > + if (encoder->type =3D=3D INTEL_OUTPUT_DP_MST) { > > > > > + ret =3D -EINVAL; > > > > > + break; > > > > > + } > > > > > + > > > > > + intel_dp =3D &enc_to_dig_port(encoder)->dp; > > > > > crtc_state =3D to_intel_crtc_state(crtc->state); > > > > > + > > > > > seq_printf(m, "DSC_Enabled: %s\n", > > > > > yesno(crtc_state->dsc.compression_enable)); > > > > > seq_printf(m, "DSC_Sink_Support: %s\n", > > > > > @@ -2147,9 +2158,8 @@ static ssize_t i915_dsc_fec_support_write(s= truct file *file, > > > > > int ret; > > > > > struct drm_connector *connector =3D > > > > > ((struct seq_file *)file->private_data)->private; > > > > > - struct intel_encoder *encoder =3D intel_attached_encoder(to_int= el_connector(connector)); > > > > > - struct drm_i915_private *i915 =3D to_i915(encoder->base.dev); > > > > > - struct intel_dp *intel_dp =3D enc_to_intel_dp(encoder); > > > > > + struct drm_i915_private *i915 =3D to_i915(connector->dev); > > > > > + struct intel_encoder *encoder; > > > > > = > > > > > if (len =3D=3D 0) > > > > > return 0; > > > > > @@ -2163,10 +2173,22 @@ static ssize_t i915_dsc_fec_support_write= (struct file *file, > > > > > = > > > > > drm_dbg(&i915->drm, "Got %s for DSC Enable\n", > > > > > (dsc_enable) ? "true" : "false"); > > > > > - intel_dp->force_dsc_en =3D dsc_enable; > > > > > = > > > > > - *offp +=3D len; > > > > > - return len; > > > > > + drm_modeset_lock(&i915->drm.mode_config.connection_mutex, NULL); > > > > > + > > > > > + encoder =3D intel_attached_encoder(to_intel_connector(connector= )); > > > > > + /* TODO: Add DSC support for MST streams */ > > > > > + if (encoder->type =3D=3D INTEL_OUTPUT_DP_MST) { even after we force dsc en from IGT through this debugfs node, the actual e= nabling checks if dsc supported, so may be since we currently dont support on MST, = can we add some condition in this function: intel_dsc_source_support() to not supp= ort on MST encoders? Also, currently since we dont even call intel_dp_dsc_compute_config in MST = codepath, how does it even make a difference if we set force_dsc_en through this debu= gfs or not for MST? Manasi > > > > = > > > > The attached encoder can be NULL for MST. > > > = > > > Yes, I also sent v2 with that fixed. > > > = > > > > Can't we just not add this debugfs file for MST connectors? > > > = > > > Won't we have per MST connector DSC at one point? In that case we'd n= eed > > > something like this anyway. > > = > > The problem is that it doesn't work until the encoder has been attached. > > So the behaviour of the interface would be rather inconsistent when > > applied to MST connectors. No idea what current tests are doing with > > this stuff so can't say whether it would be a problem in practice. > = > It's used to force DSC by writing to it before commit, so yes then it > wouldn't work anyway. > = > > > If this is never needed then yes, better not > > > to add it. I can't use connector_type which is the same for MST and S= ST > > > connectors so is it ok to differentiate based on a > > > intel_attached_encoder() =3D=3D NULL check? > > = > > IIRC some other places use connector.mst_port to tell the two > > apart. > = > Ok, will use that. > = > > = > > > = > > > > = > > > > > + ret =3D -EINVAL; > > > > > + } else { > > > > > + enc_to_intel_dp(encoder)->force_dsc_en =3D dsc_enable; > > > > > + *offp +=3D len; > > > > > + ret =3D len; > > > > > + } > > > > > + > > > > > + drm_modeset_unlock(&i915->drm.mode_config.connection_mutex); > > > > > + > > > > > + return ret; > > > > > } > > > > > = > > > > > static int i915_dsc_fec_support_open(struct inode *inode, > > > > > -- = > > > > > 2.23.1 > > > > > = > > > > > _______________________________________________ > > > > > Intel-gfx mailing list > > > > > Intel-gfx@lists.freedesktop.org > > > > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx > > > > = > > > > -- = > > > > Ville Syrj=E4l=E4 > > > > Intel > > = > > -- = > > Ville Syrj=E4l=E4 > > Intel > _______________________________________________ > 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