Re: [PATCH 1/2] drm/tegra: Fix possible CRTC mask for RGB outputs

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On Mon, Jan 13, 2014 at 10:44:26AM -0700, Stephen Warren wrote:
> On 01/13/2014 07:21 AM, Thierry Reding wrote:
> > The mask of possible CRTCs that an output (DRM encoder) can be attached
> > to is relative to the position within the DRM device's list of CRTCs.
> > Deferred probing can cause this to not match the pipe number associated
> > with a CRTC. Use the newly introduced drm_crtc_mask() to compute the
> > mask by looking up the proper index of the given CRTC in the list.
> 
> > diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c
> 
> > @@ -258,7 +258,7 @@ int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)
> 
> > -	rgb->output.encoder.possible_crtcs = 1 << dc->pipe;
> > +	rgb->output.encoder.possible_crtcs = drm_crtc_mask(&dc->base);
> 
> For me, on top of either next-20140109 or next-20140113, this causes:
> 
> > drivers/gpu/drm/tegra/rgb.c: In function ‘tegra_dc_rgb_init’:
> > drivers/gpu/drm/tegra/rgb.c:261:2: error: implicit declaration of function ‘drm_crtc_mask’ [-Werror=implicit-function-declaration]

It depends on a separate patch that I sent earlier yesterday. I thought
I had Cc'ed you and the linux-tegra mailing list on that patch, but I'm
misremembering apparently. Here's a link to the patch:

	https://patchwork.kernel.org/patch/3475421/

Thierry

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