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Wed, 22 Jul 2026 00:05:17 +0000 Received: from GV2PR04MB11799.eurprd04.prod.outlook.com ([fe80::2146:83a2:5329:b7c]) by GV2PR04MB11799.eurprd04.prod.outlook.com ([fe80::2146:83a2:5329:b7c%6]) with mapi id 15.21.0245.009; Wed, 22 Jul 2026 00:05:16 +0000 Date: Tue, 21 Jul 2026 19:05:03 -0500 From: Frank Li To: Liu Ying Cc: Marek Vasut , Stefan Agner , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Jessica Zhang , Thierry Reding , Sam Ravnborg , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Robert Chiras , Frank Li Subject: Re: [PATCH v2 3/7] drm/panel: simple: Add waiken WKS101WX001-WCT support Message-ID: References: <20260715-dxl_lcdif-v2-0-da797562636e@nxp.com> <20260715-dxl_lcdif-v2-3-da797562636e@nxp.com> Content-Type: text/plain; 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> > > > +static const struct drm_display_mode waiken_101wx001_mode = { > > + .clock = 71100, > > + .hdisplay = 1280, > > + .hsync_start = 1280 + 70, > > + .hsync_end = 1280 + 70 + 10, > > + .htotal = 1280 + 70 + 10 + 80, > > + .vdisplay = 800, > > + .vsync_start = 800 + 10, > > + .vsync_end = 800 + 10 + 3, > > + .vtotal = 800 + 10 + 3 + 10, > > + .width_mm = 217, > > + .height_mm = 135, > > + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, > > +}; > > + > > +static const struct panel_desc waiken_101wx001_panel = { > > + .modes = &waiken_101wx001_mode, > > + .num_modes = 1, > > + .bpc = 6, > > + .size = { > > + .width = 217, > > + .height = 135, > > + }, > > + .bus_format = MEDIA_BUS_FMT_RGB666_1X18, > > I find a panel specification in link [1] and guess it's for this panel. > It indicates that each color component width is 8 in 'RGB Input Interface > Description' table. > > [1] https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/Optimizing-eLCDIF-throughput/m-p/982741/highlight/true?profile.language=en#M5348 > > > + .connector_type = DRM_MODE_CONNECTOR_DPI, > > Seems that the panel also supports LVDS input according to the specification, > since it mentions 'RGB or LVDS Interface'? Need hardware rework to use LVDS. Need remove banch of resistors. Should it be treat as difference panel by different compatible string? hardware actually changed. Frank > > > + .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE, > > +}; > > + > > static const struct drm_display_mode waveshare_28_lcd_mode = { > > .clock = 50000, > > .hdisplay = 480, > > @@ -6155,6 +6183,9 @@ static const struct of_device_id platform_of_match[] = { > > }, { > > .compatible = "vxt,vl050-8048nt-c01", > > .data = &vl050_8048nt_c01, > > + }, { > > + .compatible = "waiken,101wx001", > > + .data = &waiken_101wx001_panel, > > }, { > > .compatible = "waveshare,2.8inch-panel", > > .data = &waveshare_28_lcd_panel > > > > -- > > 2.43.0 > > > > -- > Regards, > Liu Ying