[Intel-gfx] [PATCH 11/12] drm: Make drm_match_cea_mode() return the underlying 2D VIC for 3d modes

[Ville Syrjälä]

On Mon, Sep 16, 2013 at 06:48:54PM +0100, Damien Lespiau wrote:
> When scanning out a stereo mode, the AVI infoframe vic field has to be
> the underlyng 2D VIC. Before that commit, we weren't matching the CEA
> mode because of the extra stereo flag and then were setting the VIC
> field in the AVI infoframe to 0.

I think this is where we hit problems. How do we identify the 2D VIC
when the timings of the adjusted mode got mangled already to include
both eyes?

> 
> Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
> ---
>  drivers/gpu/drm/drm_edid.c  |  4 ++--
>  drivers/gpu/drm/drm_modes.c | 18 ++++++++++++------
>  include/drm/drm_crtc.h      |  2 +-
>  3 files changed, 15 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 9a36b6e..6b74698 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2401,7 +2401,7 @@ u8 drm_match_cea_mode(const struct drm_display_mode *to_match)
>  
>  		if ((KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock1) ||
>  		     KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock2)) &&
> -		    drm_mode_equal_no_clocks(to_match, cea_mode))
> +		    drm_mode_equal_no_clocks_no_stereo(to_match, cea_mode))
>  			return mode + 1;
>  	}
>  	return 0;
> @@ -2450,7 +2450,7 @@ static u8 drm_match_hdmi_mode(const struct drm_display_mode *to_match)
>  
>  		if ((KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock1) ||
>  		     KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock2)) &&
> -		    drm_mode_equal_no_clocks(to_match, hdmi_mode))
> +		    drm_mode_equal_no_clocks_no_stereo(to_match, hdmi_mode))
>  			return mode + 1;
>  	}
>  	return 0;
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index 504a602..76adee0 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -851,12 +851,16 @@ bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_displ
>  	} else if (mode1->clock != mode2->clock)
>  		return false;
>  
> -	return drm_mode_equal_no_clocks(mode1, mode2);
> +	if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
> +	    (mode2->flags & DRM_MODE_FLAG_3D_MASK))
> +		return false;
> +
> +	return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
>  }
>  EXPORT_SYMBOL(drm_mode_equal);
>  
>  /**
> - * drm_mode_equal_no_clocks - test modes for equality
> + * drm_mode_equal_no_clocks_no_stereo - test modes for equality
>   * @mode1: first mode
>   * @mode2: second mode
>   *
> @@ -864,12 +868,13 @@ EXPORT_SYMBOL(drm_mode_equal);
>   * None.
>   *
>   * Check to see if @mode1 and @mode2 are equivalent, but
> - * don't check the pixel clocks.
> + * don't check the pixel clocks nor the stereo layout.
>   *
>   * RETURNS:
>   * True if the modes are equal, false otherwise.
>   */
> -bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
> +bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
> +					const struct drm_display_mode *mode2)
>  {
>  	if (mode1->hdisplay == mode2->hdisplay &&
>  	    mode1->hsync_start == mode2->hsync_start &&
> @@ -881,12 +886,13 @@ bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct
>  	    mode1->vsync_end == mode2->vsync_end &&
>  	    mode1->vtotal == mode2->vtotal &&
>  	    mode1->vscan == mode2->vscan &&
> -	    mode1->flags == mode2->flags)
> +	    (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
> +	     (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
>  		return true;
>  
>  	return false;
>  }
> -EXPORT_SYMBOL(drm_mode_equal_no_clocks);
> +EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
>  
>  /**
>   * drm_mode_validate_size - make sure modes adhere to size constraints
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index e685baf..f0c5530 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -943,7 +943,7 @@ extern void drm_mode_config_reset(struct drm_device *dev);
>  extern void drm_mode_config_cleanup(struct drm_device *dev);
>  extern void drm_mode_set_name(struct drm_display_mode *mode);
>  extern bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
> -extern bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
> +extern bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
>  extern int drm_mode_width(const struct drm_display_mode *mode);
>  extern int drm_mode_height(const struct drm_display_mode *mode);
>  
> -- 
> 1.8.3.1
> 
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-- 
Ville Syrjälä
Intel OTC