Hi Fabio, Le Wed, 13 Nov 2013 01:52:25 -0200, Fabio Estevam <feste...@gmail.com> a écrit : > On Tue, Nov 12, 2013 at 2:49 PM, Denis Carikli <de...@eukrea.com> wrote: > > + if (mode->flags & DRM_MODE_FLAG_DE_HIGH) > > + sig_cfg.enable_pol = 1; > > + if (mode->flags & DRM_MODE_FLAG_PIXDATA_POSEDGE) > > + sig_cfg.clk_pol = 1; > > > > - sig_cfg.enable_pol = 1; > > - sig_cfg.clk_pol = 1; > > > What are the sig_cfg.enable_pol and sig_cfg.clk_pol values you need > for your display to operate correctly?
in ipuv3-crtc, line 159 : http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/staging/imx-drm/ipuv3-crtc.c#n159 polarity of the enable signal and the pixel clock are hard coded to 1. These settings are then used in ipu-di.c to configurer the IPU display interface : http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/staging/imx-drm/ipu-v3/ipu-di.c#n631 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/staging/imx-drm/ipu-v3/ipu-di.c#n642 This is a problem as the polarity of these signals can vary from one TFT panel to an other. In our case, we need and active low enable and a negative edge clock but currently there is no way to configure these settings in ipuv3-crtc as they are hardcoded to 1 : that's what Denis is trying to fix. Eric _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
