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Mon, 3 Jun 2019 10:19:34 +0800 Message-ID: <1559528374.32185.4.camel@mtksdaap41> Subject: Re: [v4 3/7] drm/mediatek: add dsi reg commit disable control From: CK Hu To: Jitao Shi Date: Mon, 3 Jun 2019 10:19:34 +0800 In-Reply-To: <20190601092615.67917-4-jitao.shi@mediatek.com> References: <20190601092615.67917-1-jitao.shi@mediatek.com> <20190601092615.67917-4-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-20190602_191957_648685_820639EE X-CRM114-Status: GOOD ( 13.25 ) 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 , 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 Hi, Jitao: On Sat, 2019-06-01 at 17:26 +0800, Jitao Shi wrote: > New DSI IP has shadow register and working reg. The register > values are writen to shadow register. And then trigger with > commit reg, the register values will be moved working register. > > This fucntion is defualt on. But this driver doesn't use this > function. So add the disable control. Reviewed-by: CK Hu > > Signed-off-by: Jitao Shi > --- > drivers/gpu/drm/mediatek/mtk_dsi.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c > index a48db056df6c..eea47294079e 100644 > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c > @@ -131,6 +131,10 @@ > #define VM_CMD_EN BIT(0) > #define TS_VFP_EN BIT(5) > > +#define DSI_SHADOW_DEBUG 0x190U > +#define FORCE_COMMIT BIT(0) > +#define BYPASS_SHADOW BIT(1) > + > #define CONFIG (0xff << 0) > #define SHORT_PACKET 0 > #define LONG_PACKET 2 > @@ -157,6 +161,7 @@ struct phy; > > struct mtk_dsi_driver_data { > const u32 reg_cmdq_off; > + bool has_shadow_ctl; > }; > > struct mtk_dsi { > @@ -594,6 +599,11 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) > } > > mtk_dsi_enable(dsi); > + > + if (dsi->driver_data->has_shadow_ctl) > + writel(FORCE_COMMIT | BYPASS_SHADOW, > + dsi->regs + DSI_SHADOW_DEBUG); > + > mtk_dsi_reset_engine(dsi); > mtk_dsi_phy_timconfig(dsi); > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel