Re: [PATCH v7 5/8] fbmon: add videomode helpers

Laurent Pinchart
2012-11-12T11:45:51Z

Hi Steffen,

On Friday 09 November 2012 20:31:33 Steffen Trumtrar wrote:
> On Fri, Nov 09, 2012 at 04:54:16PM +0000, Manjunathappa, Prakash wrote:
> > On Fri, Nov 09, 2012 at 02:55:45, Steffen Trumtrar wrote:
> > > On Wed, Oct 31, 2012 at 03:30:03PM +0000, Manjunathappa, Prakash wrote:
> > > > On Wed, Oct 31, 2012 at 14:58:05, Steffen Trumtrar wrote:
> > > > > +#if IS_ENABLED(CONFIG_VIDEOMODE)
> > > > > +int videomode_to_fb_videomode(struct videomode *vm, struct
> > > > > fb_videomode *fbmode) +{
> > > > > + fbmode->xres = vm->hactive;
> > > > > + fbmode->left_margin = vm->hback_porch;
> > > > > + fbmode->right_margin = vm->hfront_porch;
> > > > > + fbmode->hsync_len = vm->hsync_len;
> > > > > +
> > > > > + fbmode->yres = vm->vactive;
> > > > > + fbmode->upper_margin = vm->vback_porch;
> > > > > + fbmode->lower_margin = vm->vfront_porch;
> > > > > + fbmode->vsync_len = vm->vsync_len;
> > > > > +
> > > > > + fbmode->pixclock = KHZ2PICOS(vm->pixelclock / 1000);
> > > > > +
> > > > > + fbmode->sync = 0;
> > > > > + fbmode->vmode = 0;
> > > > > + if (vm->hah)
> > > > > + fbmode->sync |= FB_SYNC_HOR_HIGH_ACT;
> > > > > + if (vm->vah)
> > > > > + fbmode->sync |= FB_SYNC_VERT_HIGH_ACT;
> > > > > + if (vm->interlaced)
> > > > > + fbmode->vmode |= FB_VMODE_INTERLACED;
> > > > > + if (vm->doublescan)
> > > > > + fbmode->vmode |= FB_VMODE_DOUBLE;
> > > > > +
> > > >
> > > > "pixelclk-inverted" property of the panel is not percolated
> > > > fb_videomode.
> > > > Please let me know if I am missing something.
> > >
> > > The next version is almost finished. Only thing I'm missing is this.
> > > And I actually do not know which flag would represent an inverted
> > > pixelclock in fb_videomode. Does anybody have any idea what I have to
> > > do here?> >
> > > if (vm->pixelclk_pol)
> > >
> > > fbmode->sync = ???
> > >
> > > That's as far as I have come and I don't see a flag that seems right.
> > > Is this even a valid property of fb_videomode?
> >
> > Thanks for considering it, I see IMX addresses it as proprietary FB_SYNC_
> > flag. FB_SYNC_CLK_INVERT: arch/arm/plat-mxc/include/mach/mx3fb.h
>
> No problem. So, it seems this flag has to be set in some imx-specific
> videomode_to_fb_videomode function. It is included in the
> struct videomode, so that should be no problem. But it will not be
> part of this series.

A possible solution would be to standardize the FB_SYNC_CLK_INVERT flag in
fbdev, but that's in my opinion out of scope of this patch series. iMX3
developers, feel free to send patches :-)

--
Regards,

Laurent Pinchart