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Wed, 8 Jul 2026 01:50:28 -0500 Received: from [10.24.51.87] (devarsh-precision-tower-3620.dhcp.ti.com [10.24.51.87]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 6686oMNh1568707; Wed, 8 Jul 2026 01:50:23 -0500 Message-ID: <2e709e26-742a-4a6a-a76f-31e188fa6332@ti.com> Date: Wed, 8 Jul 2026 12:20:22 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 09/15] drm/tidss: Add external data and sync signal edge configuration To: Tomi Valkeinen , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Lee Jones , Aradhya Bhatia , Nishanth Menon , Vignesh Raghavendra , Swamil Jain , Louis Chauvet CC: , , , References: <20260529-beagley-ai-display-v3-0-7fefdc5d1adf@ideasonboard.com> <20260529-beagley-ai-display-v3-9-7fefdc5d1adf@ideasonboard.com> Content-Language: en-US From: Devarsh Thakkar In-Reply-To: <20260529-beagley-ai-display-v3-9-7fefdc5d1adf@ideasonboard.com> Content-Type: text/plain; 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> > struct clk *fclk; > + struct regmap *syscon_dpi_io_ctrl; > + unsigned int syscon_dpi_io_ctrl_offset; > > bool is_enabled; > > @@ -1201,6 +1203,13 @@ void dispc_vp_prepare(struct dispc_device *dispc, u32 hw_videoport, > mode->crtc_hdisplay - 1) | > FIELD_PREP(DISPC_VP_SIZE_SCREEN_VDISPLAY_MASK, > mode->crtc_vdisplay - 1)); > + > + if (dispc->vp_data[hw_videoport].dpi_output && dispc->syscon_dpi_io_ctrl) { > + regmap_write(dispc->syscon_dpi_io_ctrl, > + dispc->syscon_dpi_io_ctrl_offset + 0x0, > + (!ipc ? DPI0_CLK_CTRL_DATA_CLK_INVDIS : 0) | > + (rf ? DPI0_CLK_CTRL_SYNC_CLK_INVDIS : 0)); > + } > } > > void dispc_vp_enable(struct dispc_device *dispc, u32 hw_videoport) > @@ -2989,6 +2998,22 @@ int dispc_init(struct tidss_device *tidss) > > dispc_init_errata(dispc); > > + dispc->syscon_dpi_io_ctrl = > + syscon_regmap_lookup_by_phandle_args(tidss->dev->of_node, > + "ti,dpi-io-ctrl", 1, > + &dispc->syscon_dpi_io_ctrl_offset); > + > + if (IS_ERR(dispc->syscon_dpi_io_ctrl)) { > + r = PTR_ERR(dispc->syscon_dpi_io_ctrl); > + > + if (r == -ENOENT) { > + dispc->syscon_dpi_io_ctrl = NULL; > + } else { > + return dev_err_probe(dispc->dev, r, > + "failed to get 'ti,dpi-io-ctrl'\n"); > + } > + } > + > dispc->fourccs = devm_kcalloc(dev, ARRAY_SIZE(dispc_color_formats), > sizeof(*dispc->fourccs), GFP_KERNEL); > if (!dispc->fourccs) > diff --git a/drivers/gpu/drm/tidss/tidss_dispc_regs.h b/drivers/gpu/drm/tidss/tidss_dispc_regs.h > index 382027dddce8..4cdde24d8372 100644 > --- a/drivers/gpu/drm/tidss/tidss_dispc_regs.h > +++ b/drivers/gpu/drm/tidss/tidss_dispc_regs.h > @@ -333,4 +333,8 @@ enum oldi_mode_reg_val { SPWG_18 = 0, JEIDA_24 = 1, SPWG_24 = 2 }; > > #define AM65X_OLDI_PWRDN_TX BIT(8) > > +/* Bits in the MAIN_CTRL_MMR_CFG0_DPI0_CLK_CTRL register */ > +#define DPI0_CLK_CTRL_DATA_CLK_INVDIS BIT(8) > +#define DPI0_CLK_CTRL_SYNC_CLK_INVDIS BIT(9) > + > #endif /* __TIDSS_DISPC_REGS_H */ >