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Wed, 8 May 2019 10:39:05 +0800 Message-ID: <1557283144.31731.4.camel@mtksdaap41> Subject: Re: [v2 2/5] drm/mediatek: CMDQ reg address of mt8173 is different with mt2701 From: CK Hu To: Jitao Shi Date: Wed, 8 May 2019 10:39:04 +0800 In-Reply-To: <20190416060501.76276-3-jitao.shi@mediatek.com> References: <20190416060501.76276-1-jitao.shi@mediatek.com> <20190416060501.76276-3-jitao.shi@mediatek.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190507_193916_100808_3825402A X-CRM114-Status: GOOD ( 18.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, David Airlie , stonea168@163.com, dri-devel@lists.freedesktop.org, yingjoe.chen@mediatek.com, Ajay Kumar , Vincent Palatin , cawa.cheng@mediatek.com, bibby.hsieh@mediatek.com, Russell King , Thierry Reding , linux-pwm@vger.kernel.org, Sascha Hauer , Pawel Moll , Ian Campbell , Inki Dae , Rob Herring , linux-mediatek@lists.infradead.org, Andy Yan , Matthias Brugger , eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org, Rahul Sharma , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Philipp Zabel , Kumar Gala , Sean Paul 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 On Tue, 2019-04-16 at 14:04 +0800, Jitao Shi wrote: > Config the different CMDQ reg address in driver data. > For MT8173, you change reg_cmd_off from 0x180 to 0x200, so this patch is a bug fix. You should add a 'Fixes' tag. > Signed-off-by: Jitao Shi > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 39 +++++++++++++++++++++++------- > 1 file changed, 30 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > index 6c4ac37f983d..573e6bec6d36 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c > @@ -131,7 +131,6 @@ > #define VM_CMD_EN BIT(0) > #define TS_VFP_EN BIT(5) > > -#define DSI_CMDQ0 0x180 > #define CONFIG (0xff << 0) > #define SHORT_PACKET 0 > #define LONG_PACKET 2 > @@ -156,6 +155,10 @@ > > struct phy; > > +struct mtk_dsi_driver_data { > + const u32 reg_cmdq_off; > +}; > + > struct mtk_dsi { > struct mtk_ddp_comp ddp_comp; > struct device *dev; > @@ -182,6 +185,7 @@ struct mtk_dsi { > bool enabled; > u32 irq_data; > wait_queue_head_t irq_wait_queue; > + struct mtk_dsi_driver_data *driver_data; > }; > > static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) > @@ -934,6 +938,7 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg) > const char *tx_buf = msg->tx_buf; > u8 config, cmdq_size, cmdq_off, type = msg->type; > u32 reg_val, cmdq_mask, i; > + u32 reg_cmdq_off = dsi->driver_data->reg_cmdq_off; > > if (MTK_DSI_HOST_IS_READ(type)) > config = BTA; > @@ -953,9 +958,11 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg) > } > > for (i = 0; i < msg->tx_len; i++) > - writeb(tx_buf[i], dsi->regs + DSI_CMDQ0 + cmdq_off + i); > + mtk_dsi_mask(dsi, (reg_cmdq_off + cmdq_off + i) & (~0x3U), > + (0xffUL << (((i + cmdq_off) & 3U) * 8U)), > + tx_buf[i] << (((i + cmdq_off) & 3U) * 8U)); You say you would follow Nicolas' suggestion here. > > - mtk_dsi_mask(dsi, DSI_CMDQ0, cmdq_mask, reg_val); > + mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val); > mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size); > } > > @@ -1074,10 +1081,27 @@ static const struct component_ops mtk_dsi_component_ops = { > .unbind = mtk_dsi_unbind, > }; > > +static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = { > + .reg_cmdq_off = 0x200, > +}; > + > +static const struct mtk_dsi_driver_data mt2701_dsi_driver_data = { > + .reg_cmdq_off = 0x180, > +}; > + > +static const struct of_device_id mtk_dsi_of_match[] = { > + { .compatible = "mediatek,mt2701-dsi", > + .data = &mt2701_dsi_driver_data }, > + { .compatible = "mediatek,mt8173-dsi", > + .data = &mt8173_dsi_driver_data }, > + { }, > +}; > + > static int mtk_dsi_probe(struct platform_device *pdev) > { > struct mtk_dsi *dsi; > struct device *dev = &pdev->dev; > + const struct of_device_id *of_id; > struct resource *regs; > int irq_num; > int comp_id; > @@ -1101,6 +1125,9 @@ static int mtk_dsi_probe(struct platform_device *pdev) > if (ret) > goto err_unregister_host; > > + of_id = of_match_device(mtk_dsi_of_match, &pdev->dev); > + dsi->driver_data = of_id->data; Maybe use of_device_get_match_data() is a more simple way. You could refer to [1]. [1] https://elixir.bootlin.com/linux/v5.1/source/drivers/gpu/drm/mediatek/mtk_disp_ovl.c#L300 Regards, CK > + > dsi->engine_clk = devm_clk_get(dev, "engine"); > if (IS_ERR(dsi->engine_clk)) { > ret = PTR_ERR(dsi->engine_clk); > @@ -1193,12 +1220,6 @@ static int mtk_dsi_remove(struct platform_device *pdev) > return 0; > } > > -static const struct of_device_id mtk_dsi_of_match[] = { > - { .compatible = "mediatek,mt2701-dsi" }, > - { .compatible = "mediatek,mt8173-dsi" }, > - { }, > -}; > - > struct platform_driver mtk_dsi_driver = { > .probe = mtk_dsi_probe, > .remove = mtk_dsi_remove, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel