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<1546585439-30455-10-git-send-email-chunhui.dai@mediatek.com> From: Matthias Brugger Openpgp: preference=signencrypt Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa OhLZuSKB1F5JcvLbETRjNzNU7B3TdS2+zkgQQdEyt7Ij2HXGLJ2w+yG2GuR9/iyCJRf10Okq gTh//XESJZ8S6KlOWbLXRE+yfkKDXQx2Jr1XuVvM3zPqH5FMg8reRVFsQ+vI0b+OlyekT/Xe 0Hwvqkev95GG6x7yseJwI+2ydDH6M5O7fPKFW5mzAdDE2g/K9B4e2tYK6/rA7Fq4cqiAw1+u EgO44+eFgv082xtBez5WNkGn18vtw0LW3ESmKh19u6kEGoi0WZwslCNaGFrS4M7OH+aOJeqK fx5dIv2CEbxc6xnHY7dwkcHikTA4QdbdFeUSuj4YhIZ+0QlDVtS1QEXyvZbZky7ur9rHkZvP ZqlUsLJ2nOqsmahMTIQ8Mgx9SLEShWqD4kOF4zNfPJsgEMB49KbS2o9jxbGB+JKupjNddfxZ HlH1KF8QwCMZEYaTNogrVazuEJzx6JdRpR3sFda/0x5qjTadwIW6Cl9tkqe2h391dOGX1eOA 1ntn9O/39KqSrWNGvm+1raHK+Ev1yPtn0Wxn+0oy1tl67TxUjQARAQABtClNYXR0aGlhcyBC cnVnZ2VyIDxtYXR0aGlhcy5iZ2dAZ21haWwuY29tPokCUgQTAQIAPAIbAwYLCQgHAwIGFQgC 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pac005PuhxCWkKTJz3gCmznnoat4GCnL5gy/m0Qk45l4PFqwWXVLo9AQg2Kp3mlIFZ6fsEKI AN5hxlbNvNb9V2Zo5bFZjPWPFTxOteM0omUAS+QopwU0yPLLGJVf2iCmItHcUXI+r2JwH1CJ jrHWeQEI2ucSKsNa8FllDmG/fQ== Message-ID: Date: Wed, 9 Jan 2019 17:58:44 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 MIME-Version: 1.0 In-Reply-To: <1546585439-30455-10-git-send-email-chunhui.dai@mediatek.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190109_085848_647454_68F1A2BF X-CRM114-Status: GOOD ( 18.93 ) 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: jamesjj.liao@mediatek.com, Ryder Lee , jitao.shi@mediatek.com, bibby.hsieh@mediatek.com, srv_heupstream@mediatek.com, David Airlie , Sean Wang , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, Philipp Zabel , Colin Ian King , linux-clk@vger.kernel.org, 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 On 04/01/2019 08:03, chunhui dai wrote: > DPI sample on rising and falling edge. It can reduce half data io. > > Signed-off-by: Jitao Shi > Signed-off-by: chunhui dai > --- > drivers/gpu/drm/mediatek/mtk_dpi.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c > index 4a2f4a6..acb4f47 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c > @@ -117,6 +117,7 @@ struct mtk_dpi_conf { > unsigned int (*cal_factor)(int clock); > u32 reg_h_fre_con; > bool edge_sel_en; > + bool dual_edge; > }; > > static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask) > @@ -353,6 +354,15 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi) > mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN); > } > > +static void mtk_dpi_config_dual_edge(struct mtk_dpi *dpi) I think it is clearer if you rename the function to something like: mtk_dpi_enable_dual_edge and call it in mtk_dpi_set_display_mode if dpi->conf->dual_edge is true. Regards, Matthias > +{ > + if (dpi->conf->dual_edge) { > + mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | > + DDR_4PHASE, DDR_EN | DDR_4PHASE); > + mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, EDGE_SEL, EDGE_SEL); > + } > +} > + > static void mtk_dpi_config_color_format(struct mtk_dpi *dpi, > enum mtk_dpi_out_color_format format) > { > @@ -509,6 +519,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, > mtk_dpi_config_color_format(dpi, dpi->color_format); > mtk_dpi_config_2n_h_fre(dpi); > mtk_dpi_config_disable_edge(dpi); > + mtk_dpi_config_dual_edge(dpi); > mtk_dpi_sw_reset(dpi, false); > > return 0; > @@ -669,6 +680,16 @@ static unsigned int mt2701_calculate_factor(int clock) > return 1; > } > > +static unsigned int mt8183_calculate_factor(int clock) > +{ > + if (clock <= 27000) > + return 8; > + else if (clock <= 167000) > + return 4; > + else > + return 2; > +} > + > static const struct mtk_dpi_conf mt8173_conf = { > .cal_factor = mt8173_calculate_factor, > .reg_h_fre_con = 0xe0, > @@ -680,6 +701,12 @@ static unsigned int mt2701_calculate_factor(int clock) > .edge_sel_en = true, > }; > > +static const struct mtk_dpi_conf mt8183_conf = { > + .cal_factor = mt8183_calculate_factor, > + .reg_h_fre_con = 0xe0, > + .dual_edge = true, > +}; > + > static int mtk_dpi_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -775,6 +802,9 @@ static int mtk_dpi_remove(struct platform_device *pdev) > { .compatible = "mediatek,mt8173-dpi", > .data = &mt8173_conf, > }, > + { .compatible = "mediatek,mt8183-dpi", > + .data = &mt8183_conf, > + }, > { }, > }; > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel