Re: DSS2: Simultaneous DSI and DPI panels
Hi, On Friday 13 May 2011 12:46 AM, Juha Kuikka wrote: Hello, I was wondering if it would be possible to run DPI and DSI interfaces simultaneously with OMAP3 (DM3730). Limitations: - DSI would have to be in video mode (data to DSI phy through video port with H/VSYNC signaling, OMAP_DSS_PARALLELMODE_BYPASS) - DSI PLL would need to be used for clock source - Both the DPI and DSI panels would have to accept identical clocking (PCLK, blanking intervals etc). - Data lane # must match. - And of course same data would go to both I realize the current SW does not support this, but I'm more wondering if it is possible from the HW point of view because it seems to me that data out from DISPC is pretty much identical in both cases. I don't think this is possible on OMAP3, there is one LCD manager in OMAP3 which can either feed pixels to DPI or DSI. The only way you could run 2 panels is by routing LCD manager's content to DPI, and use DSI's capability to do a system DMA directly and send the data to the panel(bypassing DISPC), I don't think the system DMA method will work with a video mode panel, only command mode panels will do here. Archit - Juha -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: DSS2: Simultaneous DSI and DPI panels
On Fri, 2011-05-13 at 16:14 +0530, Archit Taneja wrote: Hi, On Friday 13 May 2011 12:46 AM, Juha Kuikka wrote: Hello, I was wondering if it would be possible to run DPI and DSI interfaces simultaneously with OMAP3 (DM3730). Limitations: - DSI would have to be in video mode (data to DSI phy through video port with H/VSYNC signaling, OMAP_DSS_PARALLELMODE_BYPASS) - DSI PLL would need to be used for clock source - Both the DPI and DSI panels would have to accept identical clocking (PCLK, blanking intervals etc). - Data lane # must match. - And of course same data would go to both I realize the current SW does not support this, but I'm more wondering if it is possible from the HW point of view because it seems to me that data out from DISPC is pretty much identical in both cases. I don't think this is possible on OMAP3, there is one LCD manager in OMAP3 which can either feed pixels to DPI or DSI. The only way you could run 2 panels is by routing LCD manager's content to DPI, and use DSI's capability to do a system DMA directly and send the data to the panel(bypassing DISPC), I don't think the system DMA method will work with a video mode panel, only command mode panels will do here. Yes, that is correct. DPI + DSI command mode would work, although in that case the DSI panel would be driven by CPU or sDMA, both of which are not very good at the job. Tomi -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
DSS2: Simultaneous DSI and DPI panels
Hello, I was wondering if it would be possible to run DPI and DSI interfaces simultaneously with OMAP3 (DM3730). Limitations: - DSI would have to be in video mode (data to DSI phy through video port with H/VSYNC signaling, OMAP_DSS_PARALLELMODE_BYPASS) - DSI PLL would need to be used for clock source - Both the DPI and DSI panels would have to accept identical clocking (PCLK, blanking intervals etc). - Data lane # must match. - And of course same data would go to both I realize the current SW does not support this, but I'm more wondering if it is possible from the HW point of view because it seems to me that data out from DISPC is pretty much identical in both cases. - Juha -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
