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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kMfj5-0006cM-GX; Sun, 27 Sep 2020 23:05:03 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kMfii-0006Ux-U6; Sun, 27 Sep 2020 23:04:44 +0000 Received: from DESKTOP-GFFITBK.localdomain (218-161-90-76.HINET-IP.hinet.net [218.161.90.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CA77223998; Sun, 27 Sep 2020 23:04:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601247880; bh=nQke9MOov7c5mbpzrlTleJeouUlfSQN45atI9kVqkwg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0JG8El3REpYx4bww5AJjWCe/7Mw5hIn48fZbiIl9YscTE57ap9cSmUyrC7y4O2IOW +y0V5cWQuxZKc1I+dl0tpIRmLe2q7xE9IPTV3hxC2+FLDF32vN4oey3ma4oFJep3D+ oN0OluLv5mJQ1nmszLj3C1GZcDcyoz1ybof02hDU= From: Chun-Kuang Hu To: Jassi Brar , Matthias Brugger Subject: [PATCH 4/4] drm/mediatek: Detect CMDQ execution timeout Date: Mon, 28 Sep 2020 07:04:22 +0800 Message-Id: <20200927230422.11610-5-chunkuang.hu@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200927230422.11610-1-chunkuang.hu@kernel.org> References: <20200927230422.11610-1-chunkuang.hu@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200927_190441_112707_0A36D2BD X-CRM114-Status: GOOD ( 14.02 ) X-Spam-Score: -5.8 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.8 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.6 DKIMWL_WL_HIGH DKIMwl.org - High trust sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Chun-Kuang Hu , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org CMDQ is used to update display register in vblank period, so it should be execute in next vblank. If it fail to execute in next 2 vblank, tiemout happen. Signed-off-by: Chun-Kuang Hu --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index f99c9d2032b8..71f770e25ad2 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -52,6 +52,7 @@ struct mtk_drm_crtc { struct mbox_client cmdq_cl; struct mbox_chan *cmdq_chan; u32 cmdq_event; + u32 cmdq_vblank_cnt; #endif struct device *mmsys_dev; @@ -244,6 +245,7 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) struct mtk_drm_crtc *mtk_crtc = container_of(cl, struct mtk_drm_crtc, cmdq_cl); struct cmdq_cb_data *data = mssg; + mtk_crtc->cmdq_vblank_cnt = 0; cmdq_pkt_destroy(mtk_crtc->cmdq_chan, data->pkt); } #endif @@ -494,6 +496,11 @@ static void mtk_drm_crtc_hw_config(struct mtk_drm_crtc *mtk_crtc) cmdq_handle->pa_base, cmdq_handle->cmd_buf_size, DMA_TO_DEVICE); + /* + * CMDQ command should execute in next vblank, + * If it fail to execute in next 2 vblank, timeout happen. + */ + mtk_crtc->cmdq_vblank_cnt = 2; cmdq_pkt_flush_async(mtk_crtc->cmdq_chan, cmdq_handle); } #endif @@ -674,10 +681,14 @@ void mtk_crtc_ddp_irq(struct drm_crtc *crtc, struct mtk_ddp_comp *comp) #if IS_REACHABLE(CONFIG_MTK_CMDQ) if (!priv->data->shadow_register && !mtk_crtc->cmdq_chan) + mtk_crtc_ddp_config(crtc, NULL); + else if (mtk_crtc->cmdq_vblank_cnt && --mtk_crtc->cmdq_vblank_cnt == 0) + DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n", + drm_crtc_index(&mtk_crtc->base)); #else if (!priv->data->shadow_register) -#endif mtk_crtc_ddp_config(crtc, NULL); +#endif mtk_drm_finish_page_flip(mtk_crtc); }