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Tue, 18 Feb 2020 00:22:45 -0800 Received: from mtkmbs08n2.mediatek.inc (172.21.101.56) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 18 Feb 2020 00:22:42 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 18 Feb 2020 16:22:07 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 18 Feb 2020 16:22:24 +0800 Message-ID: <1582014162.20566.2.camel@mtksdaap41> Subject: Re: [PATCH 2/3] drm/mediatek: make sure previous message done or be aborted before send From: CK Hu To: Bibby Hsieh Date: Tue, 18 Feb 2020 16:22:42 +0800 In-Reply-To: <1581662912.17949.4.camel@mtksdaap41> References: <20200214044954.16923-1-bibby.hsieh@mediatek.com> <20200214044954.16923-2-bibby.hsieh@mediatek.com> <1581662912.17949.4.camel@mtksdaap41> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 971137264DABD4948DC8DF38BF36DD743309BA80C941579AAD6973CA1A1390162000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200218_002249_249372_D5F56B34 X-CRM114-Status: GOOD ( 19.15 ) 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: drinkcat@chromium.org, srv_heupstream@mediatek.com, David Airlie , Daniel Vetter , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, tfiga@chromium.org, YT Shen , Thierry Reding , linux-mediatek@lists.infradead.org, Philipp Zabel , Matthias Brugger , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Bibby: On Fri, 2020-02-14 at 14:48 +0800, CK Hu wrote: > Hi, Bibby: > > On Fri, 2020-02-14 at 12:49 +0800, Bibby Hsieh wrote: > > Mediatek CMDQ driver removed atomic parameter and implementation > > related to atomic. DRM driver need to make sure previous message > > done or be aborted before we send next message. > > > > If previous message is still waiting for event, it means the > > setting hasn't been updated into display hardware register, > > we can abort the message and send next message to update the > > newest setting into display hardware. > > If previous message already started, we have to wait it until > > transmission has been completed. > > > > So we flush mbox client before we send new message to controller > > driver. > > > > Reviewed-by: CK Hu > > > This patch depends on ptach: > > [0/3] Remove atomic_exec > > https://patchwork.kernel.org/cover/11381677/ > > This patch does not depend on any patch, so applied to mediatek-drm-fixes-5.6 [1], thanks. [1] https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-fixes-5.6 Regards, CK > > Signed-off-by: Bibby Hsieh > > --- > > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > index 3c53ea22208c..e35b66c5ba0f 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > > @@ -491,6 +491,7 @@ static void mtk_drm_crtc_hw_config(struct mtk_drm_crtc *mtk_crtc) > > } > > #if IS_ENABLED(CONFIG_MTK_CMDQ) > > if (mtk_crtc->cmdq_client) { > > + mbox_flush(mtk_crtc->cmdq_client->chan, 2000); > > cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE); > > cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event); > > cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event); > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel