[PATCH 4/4] drm/i915: make DBLCLK modes work

[Anssi Hannula]

13.04.2012 22:31, Paulo Zanoni kirjoitti:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> They require an AVI InfoFrame with a proper Pixel Repetition field.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
> 
> I'm still waiting for confirmation on bugzilla, but I have access to a
> TV that reproduces the problem and the problem goes away with this patch
> series.

Shouldn't all this infoframe stuff be shared between the drivers (like
e.g. EDID stuff is)? I see i915, radeon, nouveau all have separate
implementations of it, and i915 seems to have it even twice (in
intel_hdmi.c and intel_sdvo.c).

The patch below only fixes the issue on one of those four places where
the avi/video infoframe is generated.


>  drivers/gpu/drm/i915/intel_drv.h  |    2 ++
>  drivers/gpu/drm/i915/intel_hdmi.c |    8 ++++++--
>  2 files changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 175cca7..3afa7ab 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -215,6 +215,8 @@ struct intel_plane {
>  #define DIP_TYPE_AVI    0x82
>  #define DIP_VERSION_AVI 0x2
>  #define DIP_LEN_AVI     13
> +#define DIP_AVI_PR_1    0
> +#define DIP_AVI_PR_2    1
>  
>  #define DIP_TYPE_SPD	0x83
>  #define DIP_VERSION_SPD	0x1
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 7de2d3b..8d25017 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -220,7 +220,8 @@ static void intel_set_infoframe(struct drm_encoder *encoder,
>  	intel_hdmi->write_infoframe(encoder, frame);
>  }
>  
> -static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
> +static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
> +					 struct drm_display_mode *adjusted_mode)
>  {
>  	struct dip_infoframe avi_if = {
>  		.type = DIP_TYPE_AVI,
> @@ -228,6 +229,9 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
>  		.len = DIP_LEN_AVI,
>  	};
>  
> +	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
> +		avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
> +
>  	intel_set_infoframe(encoder, &avi_if);
>  }
>  
> @@ -290,7 +294,7 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
>  	I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
>  	POSTING_READ(intel_hdmi->sdvox_reg);
>  
> -	intel_hdmi_set_avi_infoframe(encoder);
> +	intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
>  	intel_hdmi_set_spd_infoframe(encoder);
>  }
>  


-- 
Anssi Hannula