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Wed, 01 Jan 2020 21:20:45 -0800 Received: from MTKMBS31N1.mediatek.inc (172.27.4.69) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 1 Jan 2020 21:20:47 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 2 Jan 2020 13:20:11 +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; Thu, 2 Jan 2020 13:20:44 +0800 Message-ID: <1577942440.24650.5.camel@mtksdaap41> Subject: Re: [PATCH v6, 13/14] drm/mediatek: add fifo_size into rdma private data From: CK Hu To: Yongqiang Niu Date: Thu, 2 Jan 2020 13:20:40 +0800 In-Reply-To: <1577937624-14313-14-git-send-email-yongqiang.niu@mediatek.com> References: <1577937624-14313-1-git-send-email-yongqiang.niu@mediatek.com> <1577937624-14313-14-git-send-email-yongqiang.niu@mediatek.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 3B5184720FA311207A262842885CAD4A65345CC110507E138B456F27E95088672000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200101_212053_106020_DB44CDA3 X-CRM114-Status: GOOD ( 15.57 ) 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: Mark Rutland , devicetree@vger.kernel.org, Philipp Zabel , David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Rob Herring , linux-mediatek@lists.infradead.org, Daniel Vetter , 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, Yongqiang: On Thu, 2020-01-02 at 12:00 +0800, Yongqiang Niu wrote: > the fifo size of rdma in mt8183 is different. > rdma0 fifo size is 5k > rdma1 fifo size is 2k > > Signed-off-by: Yongqiang Niu > --- > drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 21 ++++++++++++++++++++- > 1 file changed, 20 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > index 405afef..691480b 100644 > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > @@ -62,6 +62,7 @@ struct mtk_disp_rdma { > struct mtk_ddp_comp ddp_comp; > struct drm_crtc *crtc; > const struct mtk_disp_rdma_data *data; > + u32 fifo_size; > }; > > static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp) > @@ -130,10 +131,16 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, > unsigned int threshold; > unsigned int reg; > struct mtk_disp_rdma *rdma = comp_to_rdma(comp); > + u32 rdma_fifo_size; > > rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xfff, width); > rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_1, 0xfffff, height); > > + if (rdma->fifo_size) > + rdma_fifo_size = rdma->fifo_size; > + else > + rdma_fifo_size = RDMA_FIFO_SIZE(rdma); > + > /* > * Enable FIFO underflow since DSI and DPI can't be blocked. > * Keep the FIFO pseudo size reset default of 8 KiB. Set the > @@ -142,7 +149,7 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width, > */ > threshold = width * height * vrefresh * 4 * 7 / 1000000; > reg = RDMA_FIFO_UNDERFLOW_EN | > - RDMA_FIFO_PSEUDO_SIZE(RDMA_FIFO_SIZE(rdma)) | > + RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) | > RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold); > writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON); > } > @@ -284,6 +291,18 @@ static int mtk_disp_rdma_probe(struct platform_device *pdev) > return comp_id; > } > > + if (of_find_property(dev->of_node, "mediatek,rdma_fifo_size", &ret)) { "mediatek,rdma_fifo_size" does not exists in binding document. > + ret = of_property_read_u32(dev->of_node, > + "mediatek,rdma_fifo_size", > + &priv->fifo_size); > + if (ret) { > + dev_err(dev, "Failed to get rdma fifo size\n"); > + return ret; > + } > + > + priv->fifo_size *= SZ_1K; Why not define fifo_size in 'bytes' ? Regards, CK > + } > + > ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id, > &mtk_disp_rdma_funcs); > if (ret) { _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel