On 02/01/2017 05:52 PM, Thierry Reding wrote: > On Wed, Feb 01, 2017 at 02:04:29PM -0200, Breno Matheus Lima wrote: >> Hi, >> >> I'm trying to use the Seiko 43WVF1G panel (Datasheet link: >> http://www.glyn.de/data/glyn/media/doc/43wvf1g-0.pdf) and the DRM_MXS >> driver on >> the i.MX6SX SabreSD. Applying the patch below removes the old >> timing configuration on the dtsi and adds it to the panel-simple.c >> I can get the display working, but the image is out of place. Another point >> to >> note is that it's necessary to set the reg_lcd_3v3 to regulator-always-on >> otherwise the gpio3 27 does not get enabled. >> >> The main two problems that I'm having at the moment are: >> >> - Gpio3 27 is not being set by the driver, function >> panel_simple_prepare(struct drm_panel *panel) is not being called. > > From a quick look the mxsfb driver is not fully implementing panel > handling. It should really call drm_panel_prepare() and > drm_panel_enable() while switching on the display pipeline and > drm_panel_disable(), followed by drm_panel_unprepare() while switching > off the display pipeline. > > That should take care of setting that GPIO. > >> - The image is displaced even when using the same timing values in >> the datasheet. >> >> I would like to know if I'm doing something wrong on my dtsi, or if >> something >> is missing on the panel-simple.c. I would appreciate any help. > > I was going to say that you could try and add debug output to the driver > to see if the same values end up being programmed into the CRTC, but the > driver currently doesn't seem to work with the existing bindings either, > it relies entirely on DRM panel to get the modes, but evidently there is > a lack of proper support for that. > > I wonder how this has been tested in the first place. Maybe Marek can > help answer these questions. I didn't use the simple-panel stuff, I used a custom panel driver, but didn't post that one yet. It's still in the pipeline. -- Best regards, Marek Vasut _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
