From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D23E7C41604 for ; Tue, 6 Oct 2020 08:58:39 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67BB72075A for ; Tue, 6 Oct 2020 08:58:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67BB72075A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; 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 AFE1D6E02B; Tue, 6 Oct 2020 08:58:38 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4A0466E02B for ; Tue, 6 Oct 2020 08:58:37 +0000 (UTC) IronPort-SDR: z7JjVlOFoM5Gq618SaWvGsWHxiOBTnb+yz1ogKtLoDZQUBkKGq7hQI5vKwVb2zi4pr+knznKei R05ixyBmDGpw== X-IronPort-AV: E=McAfee;i="6000,8403,9765"; a="228552326" X-IronPort-AV: E=Sophos;i="5.77,342,1596524400"; d="scan'208";a="228552326" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Oct 2020 01:58:36 -0700 IronPort-SDR: YMT9F8QwahPMdt4prNXCIdfLuT8fI3RfEaRaHwnaqTtjoC+A6zirF5TDN8IZ/4yygmsXh9nkiS qBK6GWtQKAfA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,342,1596524400"; d="scan'208";a="348375656" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by fmsmga002.fm.intel.com with SMTP; 06 Oct 2020 01:58:33 -0700 Received: by stinkbox (sSMTP sendmail emulation); Tue, 06 Oct 2020 11:58:33 +0300 Date: Tue, 6 Oct 2020 11:58:33 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Imre Deak Message-ID: <20201006085833.GR6112@intel.com> References: <20201005215311.1475666-2-imre.deak@intel.com> <20201005230154.1477653-1-imre.deak@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201005230154.1477653-1-imre.deak@intel.com> X-Patchwork-Hint: comment User-Agent: Mutt/1.10.1 (2018-07-13) Subject: Re: [Intel-gfx] [PATCH v3 4/5] drm/i915: Add an encoder hook to sanitize its state during init/resume 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, Oct 06, 2020 at 02:01:54AM +0300, Imre Deak wrote: > Atm, if a full modeset is performed during the initial modeset the link > training will happen with uninitialized max DP rate and lane count. Make > sure the corresponding encoder state is initialized by adding an encoder > hook called during driver init and system resume. > = > A better alternative would be to store all states in the CRTC state and > make this state available for the link re-training code. Also instead of > the DPCD read in the hook there should be really a proper sink HW > readout in place. Both of these require a bigger rework, so for now opting > for this minimal fix to make at least full initial modesets work. > = > The patch is based on > https://patchwork.freedesktop.org/patch/101473/?series=3D10354&rev=3D3 > = > v2: (Ville) > - s/sanitize_state/sync_state/ > - No point in calling the hook when CRTC is disabled, remove the call. > - No point in calling the hook for MST, remove it. > = > v3: Check only DPCD_REV to avoid clobbering intel_dp->dpcd. (Ville) > = > Cc: Ville Syrj=E4l=E4 > Signed-off-by: Imre Deak Reviewed-by: Ville Syrj=E4l=E4 > --- > drivers/gpu/drm/i915/display/intel_ddi.c | 8 ++++++ > drivers/gpu/drm/i915/display/intel_display.c | 2 ++ > .../drm/i915/display/intel_display_types.h | 7 +++++ > drivers/gpu/drm/i915/display/intel_dp.c | 28 +++++++++++++++++++ > drivers/gpu/drm/i915/display/intel_dp.h | 2 ++ > 5 files changed, 47 insertions(+) > = > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i= 915/display/intel_ddi.c > index 4e54c55ec99f..6f7bd67732f2 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > @@ -4564,6 +4564,13 @@ void intel_ddi_get_config(struct intel_encoder *en= coder, > intel_read_dp_sdp(encoder, pipe_config, DP_SDP_VSC); > } > = > +static void intel_ddi_sync_state(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state) > +{ > + if (intel_crtc_has_dp_encoder(crtc_state)) > + intel_dp_sync_state(encoder, crtc_state); > +} > + > static bool intel_ddi_initial_fastset_check(struct intel_encoder *encode= r, > struct intel_crtc_state *crtc_state) > { > @@ -5182,6 +5189,7 @@ void intel_ddi_init(struct drm_i915_private *dev_pr= iv, enum port port) > encoder->update_pipe =3D intel_ddi_update_pipe; > encoder->get_hw_state =3D intel_ddi_get_hw_state; > encoder->get_config =3D intel_ddi_get_config; > + encoder->sync_state =3D intel_ddi_sync_state; > encoder->initial_fastset_check =3D intel_ddi_initial_fastset_check; > encoder->suspend =3D intel_dp_encoder_suspend; > encoder->get_power_domains =3D intel_ddi_get_power_domains; > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/d= rm/i915/display/intel_display.c > index 755b83d47f9c..907e1d155443 100644 > --- a/drivers/gpu/drm/i915/display/intel_display.c > +++ b/drivers/gpu/drm/i915/display/intel_display.c > @@ -18723,6 +18723,8 @@ static void intel_modeset_readout_hw_state(struct= drm_device *dev) > = > encoder->base.crtc =3D &crtc->base; > encoder->get_config(encoder, crtc_state); > + if (encoder->sync_state) > + encoder->sync_state(encoder, crtc_state); > } else { > encoder->base.crtc =3D NULL; > } > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers= /gpu/drm/i915/display/intel_display_types.h > index 5297b2f08ff9..65ae2070576f 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -188,6 +188,13 @@ struct intel_encoder { > void (*get_config)(struct intel_encoder *, > struct intel_crtc_state *pipe_config); > = > + /* > + * Optional hook called during init/resume to sync any state > + * stored in the encoder (eg. DP link parameters) wrt. the HW state. > + */ > + void (*sync_state)(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state); > + > /* > * Optional hook, returning true if this encoder allows a fastset > * during the initial commit, false otherwise. > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i9= 15/display/intel_dp.c > index df5277c2b9ba..239016dcd544 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -3703,6 +3703,33 @@ static void intel_dp_get_config(struct intel_encod= er *encoder, > } > } > = > +static bool > +intel_dp_get_dpcd(struct intel_dp *intel_dp); > + > +/** > + * intel_dp_sync_state - sync the encoder state during init/resume > + * @encoder: intel encoder to sync > + * @crtc_state: state for the CRTC connected to the encoder > + * > + * Sync any state stored in the encoder wrt. HW state during driver init > + * and system resume. > + */ > +void intel_dp_sync_state(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state) > +{ > + struct intel_dp *intel_dp =3D enc_to_intel_dp(encoder); > + > + /* > + * Don't clobber DPCD if it's been already read out during output > + * setup (eDP) or detect. > + */ > + if (intel_dp->dpcd[DP_DPCD_REV] =3D=3D 0) > + intel_dp_get_dpcd(intel_dp); > + > + intel_dp->max_link_lane_count =3D intel_dp_max_common_lane_count(intel_= dp); > + intel_dp->max_link_rate =3D intel_dp_max_common_rate(intel_dp); > +} > + > bool intel_dp_initial_fastset_check(struct intel_encoder *encoder, > struct intel_crtc_state *crtc_state) > { > @@ -8090,6 +8117,7 @@ bool intel_dp_init(struct drm_i915_private *dev_pri= v, > intel_encoder->compute_config =3D intel_dp_compute_config; > intel_encoder->get_hw_state =3D intel_dp_get_hw_state; > intel_encoder->get_config =3D intel_dp_get_config; > + intel_encoder->sync_state =3D intel_dp_sync_state; > intel_encoder->initial_fastset_check =3D intel_dp_initial_fastset_check; > intel_encoder->update_pipe =3D intel_panel_update_backlight; > intel_encoder->suspend =3D intel_dp_encoder_suspend; > diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i9= 15/display/intel_dp.h > index 977585aea3c8..6c201377fdc0 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.h > +++ b/drivers/gpu/drm/i915/display/intel_dp.h > @@ -143,5 +143,7 @@ int intel_dp_init_hdcp(struct intel_digital_port *dig= _port, > = > bool intel_dp_initial_fastset_check(struct intel_encoder *encoder, > struct intel_crtc_state *crtc_state); > +void intel_dp_sync_state(struct intel_encoder *encoder, > + const struct intel_crtc_state *crtc_state); > = > #endif /* __INTEL_DP_H__ */ > -- = > 2.25.1 -- = Ville Syrj=E4l=E4 Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx