From patchwork Fri Feb 7 22:31:56 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 13966035 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 3DE7DC021A0 for ; Fri, 7 Feb 2025 22:34:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CB33310E0DB; Fri, 7 Feb 2025 22:34:28 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Qi5IwQTk"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id A901010EBB7; Fri, 7 Feb 2025 22:32:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1738967537; x=1770503537; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+nxSU7lG7VZB8Wz5lymR6Lj0oBCKLuce+LRAK8iwh+Q=; b=Qi5IwQTkAWCAQgZMCJaFILXulm8LzWAiOk/0NGNH2E/nfn5W0dxM/yxu 5x9UBB6rt5AeKi0RYbY/kQ2EO30iL7h8kng+GjbSqixte3rM70whWUim6 GRjuOp/1xk2acsS5po54uH7uKEf0xNDHp+9yEYmlo0dQO3Fj1L7/OanUw yDQkEOub4E/OzR5lObtIane0fFbHfiO/9hKOnhy/POUyXVubQSblOfwVG evqyjWc6rFzlzrYt2lJcIIQeS1j8i+TOErYZZ64fVP3zNoVRyZU0by37t s6YfxzSZCl7dt2PvksRmFDQjyi5pgFg/PYOP+m5lpTSWOS0Fp3o9cjssL g==; X-CSE-ConnectionGUID: koJlxPVjR9yxK4CVqYDLdQ== X-CSE-MsgGUID: HAadJvsKSayKnPyhLzCdyA== X-IronPort-AV: E=McAfee;i="6700,10204,11338"; a="39313400" X-IronPort-AV: E=Sophos;i="6.13,268,1732608000"; d="scan'208";a="39313400" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2025 14:32:17 -0800 X-CSE-ConnectionGUID: 2RMxBjxcTfq9iJH+nQYYCA== X-CSE-MsgGUID: 4Xjm4fXDTZKVrA981C1CIQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,268,1732608000"; d="scan'208";a="111857454" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.74]) by fmviesa008.fm.intel.com with SMTP; 07 Feb 2025 14:32:15 -0800 Received: by stinkbox (sSMTP sendmail emulation); Sat, 08 Feb 2025 00:32:14 +0200 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, Ankit Nautiyal Subject: [PATCH v2 5/8] drm/i915/dsb: Introduce intel_dsb_poll() Date: Sat, 8 Feb 2025 00:31:56 +0200 Message-ID: <20250207223159.14132-6-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.45.3 In-Reply-To: <20250207223159.14132-1-ville.syrjala@linux.intel.com> References: <20250207223159.14132-1-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 Add a function for emitting a DSB poll instruction. We'll allow the caller to specify the poll parameters. v2: s/wait/wait_us/ (Ankit) Reviewed-by: Ankit Nautiyal Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_dsb.c | 19 +++++++++++++++++++ drivers/gpu/drm/i915/display/intel_dsb.h | 3 +++ 2 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 01e3bd385cac..aba57ddfbb92 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -459,6 +459,25 @@ void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, start, end); } +void intel_dsb_poll(struct intel_dsb *dsb, + i915_reg_t reg, u32 mask, u32 val, + int wait_us, int count) +{ + struct intel_crtc *crtc = dsb->crtc; + enum pipe pipe = crtc->pipe; + + intel_dsb_reg_write(dsb, DSB_POLLMASK(pipe, dsb->id), mask); + intel_dsb_reg_write(dsb, DSB_POLLFUNC(pipe, dsb->id), + DSB_POLL_ENABLE | + DSB_POLL_WAIT(wait_us) | DSB_POLL_COUNT(count)); + + intel_dsb_noop(dsb, 5); + + intel_dsb_emit(dsb, val, + (DSB_OPCODE_POLL << DSB_OPCODE_SHIFT) | + i915_mmio_reg_offset(reg)); +} + static void intel_dsb_align_tail(struct intel_dsb *dsb) { u32 aligned_tail, tail; diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index da6df07a3c83..e843c52bf97c 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -54,6 +54,9 @@ void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, int lower, int upper); void intel_dsb_vblank_evade(struct intel_atomic_state *state, struct intel_dsb *dsb); +void intel_dsb_poll(struct intel_dsb *dsb, + i915_reg_t reg, u32 mask, u32 val, + int wait_us, int count); void intel_dsb_chain(struct intel_atomic_state *state, struct intel_dsb *dsb, struct intel_dsb *chained_dsb,