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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id EE8C8C47DD9 for ; Fri, 22 Mar 2024 18:06:53 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7C2D61126C9; Fri, 22 Mar 2024 18:06:53 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="kAGwfoIW"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id E5E201126C9 for ; Fri, 22 Mar 2024 18:06:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711130812; x=1742666812; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=GTMY221YpJ1+QrZyGAInWCZpWBpO7v7SKZgn4ndSiEI=; b=kAGwfoIWqvOwJrsmE/bmZoJHiNmCdN516QWTsfwZxJfBJP8r16ZgDMW6 YAphQBFxusw0Ekj/DaG3+jK1H7iTQShArKxXjpC6lRWgb4JCSHewuQZHd TUd6ukCrrsRv2xz96PkUOxYG1u9J4XhzNDqk92kfrWf5VKFVwLCTRAQOX kMHXA+vnFa4TSqlOA24ESXnFcyOiCAUaUQI+w+3/XCb6e+FcrxRBv6Ho5 ApEpe+Ne7L/LllhhHpkeyJBef3hZNBt0GoQON1hAbJgmHYthcg/9o0Jqa sqtDA09/w6/Z6RBX3aigMWeUsQOKAxSW8uLeGb4iLcLn9PTnyCjBtz3eF Q==; X-IronPort-AV: E=McAfee;i="6600,9927,11020"; a="6049420" X-IronPort-AV: E=Sophos;i="6.07,146,1708416000"; d="scan'208";a="6049420" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Mar 2024 11:06:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,11020"; a="827783579" X-IronPort-AV: E=Sophos;i="6.07,146,1708416000"; d="scan'208";a="827783579" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by orsmga001.jf.intel.com with SMTP; 22 Mar 2024 11:06:47 -0700 Received: by stinkbox (sSMTP sendmail emulation); Fri, 22 Mar 2024 20:06:46 +0200 Date: Fri, 22 Mar 2024 20:06:46 +0200 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Stanislav Lisovskiy Cc: intel-gfx@lists.freedesktop.org, jani.saarinen@intel.com Subject: Re: [PATCH 5/5] drm/i915: Implement vblank synchronized MBUS join changes Message-ID: References: <20240322114046.24930-1-stanislav.lisovskiy@intel.com> <20240322114046.24930-6-stanislav.lisovskiy@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240322114046.24930-6-stanislav.lisovskiy@intel.com> X-Patchwork-Hint: comment 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Fri, Mar 22, 2024 at 01:40:46PM +0200, Stanislav Lisovskiy wrote: > Currently we can't change MBUS join status without doing a modeset, > because we are lacking mechanism to synchronize those with vblank. > However then this means that we can't do a fastset, if there is a need > to change MBUS join state. Fix that by implementing such change. > We already call correspondent check and update at pre_plane dbuf update, > so the only thing left is to have a non-modeset version of that. > If active pipes stay the same then fastset is possible and only MBUS > join state/ddb allocation updates would be committed. > > Signed-off-by: Stanislav Lisovskiy > --- > drivers/gpu/drm/i915/display/intel_display.c | 6 +- > drivers/gpu/drm/i915/display/skl_watermark.c | 108 +++++++++++++++---- > drivers/gpu/drm/i915/display/skl_watermark.h | 2 + > 3 files changed, 94 insertions(+), 22 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c > index b88f214e111ae..d5351f6fa2eb4 100644 > --- a/drivers/gpu/drm/i915/display/intel_display.c > +++ b/drivers/gpu/drm/i915/display/intel_display.c > @@ -6895,6 +6895,8 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state) > intel_pre_update_crtc(state, crtc); > } > > + intel_dbuf_mbus_pre_ddb_update(state); > + > while (update_pipes) { > for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, > new_crtc_state, i) { > @@ -6925,6 +6927,8 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state) > } > } > > + intel_dbuf_mbus_post_ddb_update(state); > + > update_pipes = modeset_pipes; > > /* > @@ -7169,9 +7173,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state) > } > > intel_encoders_update_prepare(state); > - > intel_dbuf_pre_plane_update(state); > - intel_mbus_dbox_update(state); > > for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { > if (new_crtc_state->do_async_flip) > diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c > index 7eb78e0c8c8e3..eee13b57d4830 100644 > --- a/drivers/gpu/drm/i915/display/skl_watermark.c > +++ b/drivers/gpu/drm/i915/display/skl_watermark.c > @@ -4,6 +4,7 @@ > */ > > #include > +#include > > #include "i915_drv.h" > #include "i915_fixed.h" > @@ -2636,13 +2637,6 @@ skl_compute_ddb(struct intel_atomic_state *state) > if (ret) > return ret; > > - if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) { > - /* TODO: Implement vblank synchronized MBUS joining changes */ > - ret = intel_modeset_all_pipes_late(state, "MBUS joining change"); > - if (ret) > - return ret; > - } > - > drm_dbg_kms(&i915->drm, > "Enabled dbuf slices 0x%x -> 0x%x (total dbuf slices 0x%x), mbus joined? %s->%s\n", > old_dbuf_state->enabled_slices, > @@ -3594,30 +3588,57 @@ static void intel_dbuf_mdclk_min_tracker_update(struct intel_atomic_state *state > new_dbuf_state->joined_mbus); > } > > +static enum pipe intel_mbus_joined_pipe(struct intel_atomic_state *state, > + const struct intel_dbuf_state *dbuf_state) > +{ > + struct drm_i915_private *i915 = to_i915(state->base.dev); > + enum pipe sync_pipe = ffs(dbuf_state->active_pipes) - 1; > + struct intel_crtc_state *new_crtc_state; const > + struct intel_crtc *crtc; > + > + drm_WARN_ON(&i915->drm, !dbuf_state->joined_mbus); > + drm_WARN_ON(&i915->drm, !is_power_of_2(dbuf_state->active_pipes)); > + > + crtc = intel_crtc_for_pipe(i915, sync_pipe); > + new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); > + > + if (new_crtc_state && !intel_crtc_needs_modeset(new_crtc_state)) > + return sync_pipe; > + else > + return INVALID_PIPE; > +} > + > /* > * Configure MBUS_CTL and all DBUF_CTL_S of each slice to join_mbus state before > * update the request state of all DBUS slices. > */ > -static void intel_dbuf_mbus_join_update(struct intel_atomic_state *state) > +static void intel_dbuf_mbus_ctl_update(struct intel_atomic_state *state, > + enum pipe sync_pipe) > { > struct drm_i915_private *i915 = to_i915(state->base.dev); > u32 mbus_ctl; > const struct intel_dbuf_state *new_dbuf_state = > intel_atomic_get_new_dbuf_state(state); > + u32 pipe_select; > > if (!HAS_MBUS_JOINING(i915)) > return; > > + if (sync_pipe != INVALID_PIPE) > + pipe_select = MBUS_JOIN_PIPE_SELECT(sync_pipe); > + else > + pipe_select = MBUS_JOIN_PIPE_SELECT_NONE; > + > /* > * TODO: Implement vblank synchronized MBUS joining changes. > * Must be properly coordinated with dbuf reprogramming. > */ > if (new_dbuf_state->joined_mbus) > mbus_ctl = MBUS_HASHING_MODE_1x4 | MBUS_JOIN | > - MBUS_JOIN_PIPE_SELECT_NONE; > + pipe_select; > else > mbus_ctl = MBUS_HASHING_MODE_2x2 | > - MBUS_JOIN_PIPE_SELECT_NONE; > + pipe_select; The 'pipe_select' variable looks completely redundant. You can just do if (sync_pipe != INVALID_PIPE) mbus_ctl |= ... else mbus_ctl |= ... directly here. > > intel_de_rmw(i915, MBUS_CTL, > MBUS_HASHING_MODE_MASK | MBUS_JOIN | > @@ -3632,6 +3653,42 @@ void intel_dbuf_pre_plane_update(struct intel_atomic_state *state) > const struct intel_dbuf_state *old_dbuf_state = > intel_atomic_get_old_dbuf_state(state); > > + if (!new_dbuf_state || > + (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices)) redundant parens. > + return; > + > + WARN_ON(!new_dbuf_state->base.changed); > + > + gen9_dbuf_slices_update(i915, > + old_dbuf_state->enabled_slices | > + new_dbuf_state->enabled_slices); > +} > + > +void intel_dbuf_post_plane_update(struct intel_atomic_state *state) > +{ > + struct drm_i915_private *i915 = to_i915(state->base.dev); > + const struct intel_dbuf_state *new_dbuf_state = > + intel_atomic_get_new_dbuf_state(state); > + const struct intel_dbuf_state *old_dbuf_state = > + intel_atomic_get_old_dbuf_state(state); > + > + if (!new_dbuf_state || > + (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices)) ditto > + return; > + > + WARN_ON(!new_dbuf_state->base.changed); > + > + gen9_dbuf_slices_update(i915, > + new_dbuf_state->enabled_slices); > +} > + > +void intel_dbuf_mbus_pre_ddb_update(struct intel_atomic_state *state) > +{ > + const struct intel_dbuf_state *new_dbuf_state = > + intel_atomic_get_new_dbuf_state(state); > + const struct intel_dbuf_state *old_dbuf_state = > + intel_atomic_get_old_dbuf_state(state); > + > if (!new_dbuf_state || > (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices && > new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus)) > @@ -3640,16 +3697,15 @@ void intel_dbuf_pre_plane_update(struct intel_atomic_state *state) > WARN_ON(!new_dbuf_state->base.changed); > > if (!old_dbuf_state->joined_mbus && new_dbuf_state->joined_mbus) { > - intel_dbuf_mbus_join_update(state); > + enum pipe sync_pipe = intel_mbus_joined_pipe(state, new_dbuf_state); > + > + intel_dbuf_mbus_ctl_update(state, sync_pipe); > + intel_mbus_dbox_update(state); > intel_dbuf_mdclk_min_tracker_update(state); > } > - > - gen9_dbuf_slices_update(i915, > - old_dbuf_state->enabled_slices | > - new_dbuf_state->enabled_slices); > } > > -void intel_dbuf_post_plane_update(struct intel_atomic_state *state) > +void intel_dbuf_mbus_post_ddb_update(struct intel_atomic_state *state) > { > struct drm_i915_private *i915 = to_i915(state->base.dev); > const struct intel_dbuf_state *new_dbuf_state = > @@ -3657,6 +3713,12 @@ void intel_dbuf_post_plane_update(struct intel_atomic_state *state) > const struct intel_dbuf_state *old_dbuf_state = > intel_atomic_get_old_dbuf_state(state); > > + if (new_dbuf_state && old_dbuf_state && > + new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus) { > + intel_dbuf_mdclk_min_tracker_update(state); > + intel_mbus_dbox_update(state); > + } I still think should go into one of the new ddb hooks. I think we want to program these before the new planes get enabled. So I'd probably stuff this into the post ddb hook. > + > if (!new_dbuf_state || > (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices && > new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus)) > @@ -3665,12 +3727,18 @@ void intel_dbuf_post_plane_update(struct intel_atomic_state *state) > WARN_ON(!new_dbuf_state->base.changed); > > if (old_dbuf_state->joined_mbus && !new_dbuf_state->joined_mbus) { > - intel_dbuf_mbus_join_update(state); > + enum pipe sync_pipe = intel_mbus_joined_pipe(state, old_dbuf_state); > + > intel_dbuf_mdclk_min_tracker_update(state); > - } > + intel_mbus_dbox_update(state); > + intel_dbuf_mbus_ctl_update(state, sync_pipe); > > - gen9_dbuf_slices_update(i915, > - new_dbuf_state->enabled_slices); > + if (sync_pipe != INVALID_PIPE) { > + struct intel_crtc *crtc = intel_crtc_for_pipe(i915, sync_pipe); > + > + intel_crtc_wait_for_next_vblank(crtc); > + } > + } > } > > static bool xelpdp_is_only_pipe_per_dbuf_bank(enum pipe pipe, u8 active_pipes) > diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h > index 3a90741cab06a..f6d38b41e3a6c 100644 > --- a/drivers/gpu/drm/i915/display/skl_watermark.h > +++ b/drivers/gpu/drm/i915/display/skl_watermark.h > @@ -77,6 +77,8 @@ int intel_dbuf_state_set_mdclk_cdclk_ratio(struct intel_atomic_state *state, u8 > void intel_dbuf_pre_plane_update(struct intel_atomic_state *state); > void intel_dbuf_post_plane_update(struct intel_atomic_state *state); > void intel_dbuf_mdclk_cdclk_ratio_update(struct drm_i915_private *i915, u8 ratio, bool joined_mbus); > +void intel_dbuf_mbus_pre_ddb_update(struct intel_atomic_state *state); > +void intel_dbuf_mbus_post_ddb_update(struct intel_atomic_state *state); > void intel_mbus_dbox_update(struct intel_atomic_state *state); > > #endif /* __SKL_WATERMARK_H__ */ > -- > 2.37.3 -- Ville Syrjälä Intel