From patchwork Mon Sep 2 13:53:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ville Syrjala X-Patchwork-Id: 13787337 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 A95C8CD342A for ; Mon, 2 Sep 2024 13:55:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 461F410E2FF; Mon, 2 Sep 2024 13:55:21 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="I6Hdp5PU"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9220A10E2FF for ; Mon, 2 Sep 2024 13:55:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1725285319; x=1756821319; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=gdfBOPywj+8Rh8+TwA+MDkdoy34QGlM1JH9QpV6UKtk=; b=I6Hdp5PUHOilJz88aB4o1VJeuQn6pZGWZ0yycG9+0Vo8Ah6q+bN4joAR u5Sb4XheM55U8tinfERiP7Y+n0eVqTYAwNvNFs6i5cl1KtkLDvDEliunO C0RoIAq26e4PX6O2yHRzP0QAdTqnZRe8RiRnajKTwYATv4hlK1LpcHmQ8 4hYbskrkVeHyNRrC2GgfMT7tEFd1d2Rjg9fv4GFWr3NrhfvlM143Wnt6u H7zCWnXq3TJyx1wFPyUfoWLPaIkNKKpvqk+F5LjFMdW+Fkgq/r85HZpOv 8loQXbdQGXPgLoynVEXggxq2d1yFUc6SBjqN42gyamGkp4iGQ9pEo2vIB A==; X-CSE-ConnectionGUID: tVkT14EHQxubqLjhqe+MRA== X-CSE-MsgGUID: cMMZtMNCSS6A1bGeCUmbug== X-IronPort-AV: E=McAfee;i="6700,10204,11183"; a="41343668" X-IronPort-AV: E=Sophos;i="6.10,195,1719903600"; d="scan'208";a="41343668" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Sep 2024 06:54:21 -0700 X-CSE-ConnectionGUID: 1LIH0hv6Q/mfStboxakxpw== X-CSE-MsgGUID: /x4NVwy6S1e5mGVusGOZsA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,195,1719903600"; d="scan'208";a="64623937" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by fmviesa008.fm.intel.com with SMTP; 02 Sep 2024 06:54:19 -0700 Received: by stinkbox (sSMTP sendmail emulation); Mon, 02 Sep 2024 16:54:18 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Subject: [PATCH 13/13] drm/i915/dsb: Use DSB for plane/color management updates Date: Mon, 2 Sep 2024 16:53:42 +0300 Message-ID: <20240902135342.1050-14-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.44.2 In-Reply-To: <20240902135342.1050-1-ville.syrjala@linux.intel.com> References: <20240902135342.1050-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 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" From: Ville Syrjälä Push regular plane/color management updates to the DSB, if other constraints allow it. The first part of the sequence will go as follows: - CPU will kick off DSB0 immediately - DSB0 writes double bufferd non-arming registers - DSB0 evades the vblank - DSB0 writes double buffered arming registers If no color management updates is needed we follow that up with: - DSB0 waits for the undelayed vblank - DSB0 waits for the delayed vblank (usec wait) - DSB0 emits an interrupt which will cause the CPU to complete the commit If color management update is needed: - DSB0 will start DSB1 with wait for undelayed vblank - DSB0 will in parallel perform the force DEwake tricks - DSB1 writes single buffered LUT registers - DSB1 waits for the delayed vblank (usec wait) - DSB1 emits an interrupt which will cause the CPU to complete the commit With this sequence we don't need to increase the vblank delay to make room for register programming during vblank, which is a good thing for high refresh rate display. But I'll need to still think of some way to eliminate VRR commit completion related races under this scheme. Stuff that isn't ready for DSB yet: - modesets (potentially we could do at least the plane enabling via DSB) - fastsets - VRR - PSR - scalers - async flips Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_atomic.c | 5 +- drivers/gpu/drm/i915/display/intel_color.c | 25 +--- drivers/gpu/drm/i915/display/intel_crtc.c | 5 +- drivers/gpu/drm/i915/display/intel_display.c | 128 ++++++++++++++++-- .../drm/i915/display/intel_display_types.h | 5 +- 5 files changed, 128 insertions(+), 40 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c index 12d6ed940751..52a055032c68 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic.c +++ b/drivers/gpu/drm/i915/display/intel_atomic.c @@ -277,7 +277,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc) crtc_state->fb_bits = 0; crtc_state->update_planes = 0; crtc_state->dsb_color_vblank = NULL; - crtc_state->dsb_color_commit = NULL; + crtc_state->dsb_commit = NULL; + crtc_state->use_dsb = false; return &crtc_state->uapi; } @@ -312,7 +313,7 @@ intel_crtc_destroy_state(struct drm_crtc *crtc, struct intel_crtc_state *crtc_state = to_intel_crtc_state(state); drm_WARN_ON(crtc->dev, crtc_state->dsb_color_vblank); - drm_WARN_ON(crtc->dev, crtc_state->dsb_color_commit); + drm_WARN_ON(crtc->dev, crtc_state->dsb_commit); __drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi); intel_crtc_free_hw_state(crtc_state); diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 685da9f84b0a..ac4d4f5349a4 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -1913,9 +1913,6 @@ void intel_color_commit_arm(struct intel_dsb *dsb, struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev); i915->display.funcs.color->color_commit_arm(dsb, crtc_state); - - if (crtc_state->dsb_color_commit) - intel_dsb_commit(crtc_state->dsb_color_commit, false); } void intel_color_post_update(const struct intel_crtc_state *crtc_state) @@ -1949,28 +1946,14 @@ void intel_color_prepare_commit(struct intel_atomic_state *state, i915->display.funcs.color->load_luts(crtc_state); + intel_dsb_wait_vblank_delay(state, crtc_state->dsb_color_vblank); + intel_dsb_interrupt(crtc_state->dsb_color_vblank); + intel_dsb_finish(crtc_state->dsb_color_vblank); - - crtc_state->dsb_color_commit = intel_dsb_prepare(state, crtc, INTEL_DSB_0, 16); - if (!crtc_state->dsb_color_commit) { - intel_dsb_cleanup(crtc_state->dsb_color_vblank); - crtc_state->dsb_color_vblank = NULL; - return; - } - - intel_dsb_chain(state, crtc_state->dsb_color_commit, - crtc_state->dsb_color_vblank, true); - - intel_dsb_finish(crtc_state->dsb_color_commit); } void intel_color_cleanup_commit(struct intel_crtc_state *crtc_state) { - if (crtc_state->dsb_color_commit) { - intel_dsb_cleanup(crtc_state->dsb_color_commit); - crtc_state->dsb_color_commit = NULL; - } - if (crtc_state->dsb_color_vblank) { intel_dsb_cleanup(crtc_state->dsb_color_vblank); crtc_state->dsb_color_vblank = NULL; @@ -1979,8 +1962,6 @@ void intel_color_cleanup_commit(struct intel_crtc_state *crtc_state) void intel_color_wait_commit(const struct intel_crtc_state *crtc_state) { - if (crtc_state->dsb_color_commit) - intel_dsb_wait(crtc_state->dsb_color_commit); if (crtc_state->dsb_color_vblank) intel_dsb_wait(crtc_state->dsb_color_vblank); } diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c index 30616101b4f2..f643430c1881 100644 --- a/drivers/gpu/drm/i915/display/intel_crtc.c +++ b/drivers/gpu/drm/i915/display/intel_crtc.c @@ -390,10 +390,11 @@ int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe) static bool intel_crtc_needs_vblank_work(const struct intel_crtc_state *crtc_state) { return crtc_state->hw.active && - !intel_crtc_needs_modeset(crtc_state) && !crtc_state->preload_luts && + !intel_crtc_needs_modeset(crtc_state) && intel_crtc_needs_color_update(crtc_state) && - !intel_color_uses_dsb(crtc_state); + !intel_color_uses_dsb(crtc_state) && + !crtc_state->use_dsb; } static void intel_crtc_vblank_work(struct kthread_work *base) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 7d157fc64a3b..a1724e3a9794 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -6821,7 +6821,7 @@ static void commit_pipe_pre_planes(struct intel_atomic_state *state, * During modesets pipe configuration was programmed as the * CRTC was enabled. */ - if (!modeset) { + if (!modeset && !new_crtc_state->use_dsb) { if (intel_crtc_needs_color_update(new_crtc_state)) intel_color_commit_arm(NULL, new_crtc_state); @@ -6923,10 +6923,12 @@ static void intel_pre_update_crtc(struct intel_atomic_state *state, drm_WARN_ON(&i915->drm, !intel_display_power_is_enabled(i915, POWER_DOMAIN_DC_OFF)); if (!modeset && - intel_crtc_needs_color_update(new_crtc_state)) + intel_crtc_needs_color_update(new_crtc_state) && + !new_crtc_state->use_dsb) intel_color_commit_noarm(NULL, new_crtc_state); - intel_crtc_planes_update_noarm(NULL, state, crtc); + if (!new_crtc_state->use_dsb) + intel_crtc_planes_update_noarm(NULL, state, crtc); } static void intel_update_crtc(struct intel_atomic_state *state, @@ -6937,16 +6939,25 @@ static void intel_update_crtc(struct intel_atomic_state *state, struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); - /* Perform vblank evasion around commit operation */ - intel_pipe_update_start(state, crtc); + if (new_crtc_state->use_dsb) { + intel_crtc_prepare_vblank_event(new_crtc_state, &crtc->dsb_event); - commit_pipe_pre_planes(state, crtc); + intel_dsb_commit(new_crtc_state->dsb_commit, false); + } else { + /* Perform vblank evasion around commit operation */ + intel_pipe_update_start(state, crtc); - intel_crtc_planes_update_arm(NULL, state, crtc); + if (new_crtc_state->dsb_commit) + intel_dsb_commit(new_crtc_state->dsb_commit, false); - commit_pipe_post_planes(state, crtc); + commit_pipe_pre_planes(state, crtc); - intel_pipe_update_end(state, crtc); + intel_crtc_planes_update_arm(NULL, state, crtc); + + commit_pipe_post_planes(state, crtc); + + intel_pipe_update_end(state, crtc); + } /* * VRR/Seamless M/N update may need to update frame timings. @@ -7271,6 +7282,24 @@ static void intel_atomic_commit_fence_wait(struct intel_atomic_state *intel_stat } } +static void intel_atomic_dsb_wait_commit(struct intel_crtc_state *crtc_state) +{ + if (crtc_state->dsb_commit) + intel_dsb_wait(crtc_state->dsb_commit); + + intel_color_wait_commit(crtc_state); +} + +static void intel_atomic_dsb_cleanup(struct intel_crtc_state *crtc_state) +{ + if (crtc_state->dsb_commit) { + intel_dsb_cleanup(crtc_state->dsb_commit); + crtc_state->dsb_commit = NULL; + } + + intel_color_cleanup_commit(crtc_state); +} + static void intel_atomic_cleanup_work(struct work_struct *work) { struct intel_atomic_state *state = @@ -7281,7 +7310,7 @@ static void intel_atomic_cleanup_work(struct work_struct *work) int i; for_each_old_intel_crtc_in_state(state, crtc, old_crtc_state, i) - intel_color_cleanup_commit(old_crtc_state); + intel_atomic_dsb_cleanup(old_crtc_state); drm_atomic_helper_cleanup_planes(&i915->drm, &state->base); drm_atomic_helper_commit_cleanup_done(&state->base); @@ -7337,6 +7366,78 @@ static void intel_atomic_dsb_prepare(struct intel_atomic_state *state, intel_color_prepare_commit(state, crtc); } +static void intel_atomic_dsb_finish(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + const struct intel_crtc_state *old_crtc_state = + intel_atomic_get_old_crtc_state(state, crtc); + struct intel_crtc_state *new_crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + + if (!new_crtc_state->hw.active) + return; + + if (state->base.legacy_cursor_update) + return; + + /* FIXME deal with everything */ + new_crtc_state->use_dsb = + new_crtc_state->update_planes && + !new_crtc_state->vrr.enable && + !new_crtc_state->do_async_flip && + !new_crtc_state->has_psr && + !new_crtc_state->scaler_state.scaler_users && + !old_crtc_state->scaler_state.scaler_users && + !intel_crtc_needs_modeset(new_crtc_state) && + !intel_crtc_needs_fastset(new_crtc_state); + + if (!new_crtc_state->use_dsb && !new_crtc_state->dsb_color_vblank) + return; + + /* + * Rough estimate: + * ~64 registers per each plane * 8 planes = 512 + * Double that for pipe stuff and other overhead. + */ + new_crtc_state->dsb_commit = intel_dsb_prepare(state, crtc, INTEL_DSB_0, + new_crtc_state->use_dsb ? 1024 : 16); + if (!new_crtc_state->dsb_commit) { + new_crtc_state->use_dsb = false; + intel_color_cleanup_commit(new_crtc_state); + return; + } + + if (new_crtc_state->use_dsb) { + if (intel_crtc_needs_color_update(new_crtc_state)) + intel_color_commit_noarm(new_crtc_state->dsb_commit, + new_crtc_state); + intel_crtc_planes_update_noarm(new_crtc_state->dsb_commit, + state, crtc); + + intel_dsb_vblank_evade(state, new_crtc_state->dsb_commit); + + if (intel_crtc_needs_color_update(new_crtc_state)) + intel_color_commit_arm(new_crtc_state->dsb_commit, + new_crtc_state); + bdw_set_pipe_misc(new_crtc_state->dsb_commit, + new_crtc_state); + intel_crtc_planes_update_arm(new_crtc_state->dsb_commit, + state, crtc); + + if (!new_crtc_state->dsb_color_vblank) { + intel_dsb_wait_vblanks(new_crtc_state->dsb_commit, 1); + intel_dsb_wait_vblank_delay(state, new_crtc_state->dsb_commit); + intel_dsb_interrupt(new_crtc_state->dsb_commit); + } + } + + if (new_crtc_state->dsb_color_vblank) + intel_dsb_chain(state, new_crtc_state->dsb_commit, + new_crtc_state->dsb_color_vblank, true); + + intel_dsb_finish(new_crtc_state->dsb_commit); +} + static void intel_atomic_commit_tail(struct intel_atomic_state *state) { struct drm_device *dev = state->base.dev; @@ -7356,6 +7457,9 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state) intel_atomic_prepare_plane_clear_colors(state); + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) + intel_atomic_dsb_finish(state, crtc); + drm_atomic_helper_wait_for_dependencies(&state->base); drm_dp_mst_atomic_wait_for_dependencies(&state->base); intel_atomic_global_state_wait_for_dependencies(state); @@ -7469,7 +7573,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state) if (new_crtc_state->do_async_flip) intel_crtc_disable_flip_done(state, crtc); - intel_color_wait_commit(new_crtc_state); + intel_atomic_dsb_wait_commit(new_crtc_state); } /* @@ -7521,7 +7625,7 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state) * FIXME get rid of this funny new->old swapping */ old_crtc_state->dsb_color_vblank = fetch_and_zero(&new_crtc_state->dsb_color_vblank); - old_crtc_state->dsb_color_commit = fetch_and_zero(&new_crtc_state->dsb_color_commit); + old_crtc_state->dsb_commit = fetch_and_zero(&new_crtc_state->dsb_commit); } /* Underruns don't always raise interrupts, so check manually */ diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 36f52f2d0104..7719f3fc2721 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1400,8 +1400,9 @@ struct intel_crtc_state { /* Only valid on TGL+ */ enum transcoder mst_master_transcoder; - /* For DSB based color LUT updates */ - struct intel_dsb *dsb_color_vblank, *dsb_color_commit; + /* For DSB based pipe updates */ + struct intel_dsb *dsb_color_vblank, *dsb_commit; + bool use_dsb; u32 psr2_man_track_ctl;