From patchwork Tue Apr 23 17:18:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Anderson X-Patchwork-Id: 13640440 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 49DF1C4345F for ; Tue, 23 Apr 2024 17:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=AKUMoE4QdMEncBLUD8/W3nAiAnTRogaZ0H83plu/Dm0=; b=MW0TFrVUw6vbGJ xeu6+Yq8DE10POUek8GhCXDAyzUUE5JfqsVz2zdLsL6B5NnLIjziId3cdAAluMOplUryQ/DKWf2JG oXeVhvH8wep2vTEslldiJPA41ISt5MsDri9wVVAQBYlZ4MGvnO5jKyer10mRGmB971COyn4fidIV4 6NP5eiFY+7iZaulXqoEWUe1sg4BxukGnKkMjoInrpZZhT6ay8MzRNvQcm3pFEMdWgQz8Gj1VaqZ6R 2dtFPnVjMCMYotfBZi9fC/2QS/F0vbogNkHKdvaZP9NUgBhIBQ9Lr5YVcot8ywHyl1PkZQhEbB8pE AIdhRQOwdOnMOP0X4I5g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rzJne-00000000v6G-1FXm; Tue, 23 Apr 2024 17:19:22 +0000 Received: from out-170.mta0.migadu.com ([2001:41d0:1004:224b::aa]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rzJnZ-00000000v3Q-3c1E for linux-arm-kernel@lists.infradead.org; Tue, 23 Apr 2024 17:19:19 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1713892748; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=GkDOBRS3bMMlmPWhkPDc7Z2NwYGzHPLznmeKWSenCK0=; b=EWRJ0KOakByqTr3nmR6CXByfwD7AlAMDfbf1tqiKsGrDWPpo3JJ0voXLhWi03MpyiN1OXb 91VScwtFKwPGkoiu3YhqPkME9aDfChv4y+i1NDu75NwPAc7ogOLUpJ9GRgkT+15fTSibR1 JYfRtOW3ayf4xVL/3E9LpN0ONa5+ngQ= From: Sean Anderson To: Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , dri-devel@lists.freedesktop.org Cc: Daniel Vetter , linux-arm-kernel@lists.infradead.org, Michal Simek , linux-kernel@vger.kernel.org, David Airlie , Tomi Valkeinen , Sean Anderson Subject: [PATCH v4 00/13] drm: zynqmp_dp: IRQ cleanups and debugfs support Date: Tue, 23 Apr 2024 13:18:46 -0400 Message-Id: <20240423171859.3953024-1-sean.anderson@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240423_101918_138489_2923FDA1 X-CRM114-Status: GOOD ( 12.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series cleans up the zyqnmp_dp IRQ and locking situation. Once that's done, it adds debugfs support. The intent is to enable compliance testing or to help debug signal-integrity issues. Last time I discussed converting the HPD work(s) to a threaded IRQ. I did not end up doing that for this series since the steps would be - Add locking - Move link retraining to a work function - Harden the IRQ - Merge the works into a threaded IRQ (omitted) Which with the exception of the final step is the same as leaving those works as-is. Conversion to a threaded IRQ can be done as a follow-up. Changes in v4: - Rebase onto drm/drm-next Changes in v3: - Store base pointers in zynqmp_disp directly - Don't delay work - Convert to a hard IRQ - Use AUX IRQs instead of polling - Take dp->lock in zynqmp_dp_hpd_work_func Changes in v2: - Fix kerneldoc - Rearrange zynqmp_dp for better padding - Split off the HPD IRQ work into another commit - Expand the commit message - Document hpd_irq_work - Document debugfs files - Add ignore_aux_errors and ignore_hpd debugfs files to replace earlier implicit functionality - Attempt to fix unreproducable, spurious build warning - Drop "Optionally ignore DPCD errors" in favor of a debugfs file directly affecting zynqmp_dp_aux_transfer. Sean Anderson (13): drm: xlnx: Store base pointers in zynqmp_disp directly drm: xlnx: Fix kerneldoc drm: zynqmp_dp: Downgrade log level for aux retries message drm: zynqmp_dp: Adjust training values per-lane drm: zynqmp_dp: Rearrange zynqmp_dp for better padding drm: zynqmp_dp: Don't delay work drm: zynqmp_dp: Add locking drm: zynqmp_dp: Don't retrain the link in our IRQ drm: zynqmp_dp: Convert to a hard IRQ drm: zynqmp_dp: Use AUX IRQs instead of polling drm: zynqmp_dp: Split off several helper functions drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func drm: zynqmp_dp: Add debugfs interface for compliance testing Documentation/gpu/drivers.rst | 1 + Documentation/gpu/zynqmp.rst | 149 +++++ MAINTAINERS | 1 + drivers/gpu/drm/xlnx/zynqmp_disp.c | 44 +- drivers/gpu/drm/xlnx/zynqmp_dp.c | 908 +++++++++++++++++++++++++--- drivers/gpu/drm/xlnx/zynqmp_dpsub.h | 1 + drivers/gpu/drm/xlnx/zynqmp_kms.h | 4 +- 7 files changed, 999 insertions(+), 109 deletions(-) create mode 100644 Documentation/gpu/zynqmp.rst