[Intel-gfx] [PATCH 13/13] drm/i915: check for non-native modes when inheriting a BIOS fb

[Imre Deak]

On Tue, 2013-02-19 at 13:31 -0800, Jesse Barnes wrote:
> If the mode is non-native using the panel fitter, don't try to re-use
> the fb the BIOS allocated for it.
> 
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> ---
>  drivers/gpu/drm/i915/intel_fb.c |   12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
> index b60f277..9ff12aa 100644
> --- a/drivers/gpu/drm/i915/intel_fb.c
> +++ b/drivers/gpu/drm/i915/intel_fb.c
> @@ -438,6 +438,18 @@ void intel_fbdev_init_bios(struct drm_device *dev)
>  		width = ((val >> 16) & 0xfff) + 1;
>  		height = ((val >> 0) & 0xfff) + 1;
>  
> +		/* Don't bother inheriting panel fitted modes */
> +		val = I915_READ(HTOTAL(pipe));
> +		if (((val & 0xffff) + 1) != width) {
> +			DRM_ERROR("BIOS fb not native width (%d vs %d), skipping\n", width, (val & 0xffff) + 1);
> +			continue;
> +		}
> +		val = I915_READ(VTOTAL(pipe));
> +		if (((val & 0xffff) + 1) != height) {
> +			DRM_ERROR("BIOS fb not native width (%d vs %d), skipping\n", height, (val & 0xffff) + 1);

s/width/height/

> +			continue;
> +		}
> +
>  		DRM_DEBUG_KMS("Found active pipe [%d/%d]: size=%dx%d@%d, offset=%x\n",
>  			      pipe, plane, width, height, bpp, offset);
>  

On the series with my comments and the note that I couldn't yet test it:
Reviewed-by: Imre Deak <imre.deak at intel.com>