[Intel-gfx] [PATCH] vlv eDP BIOS Compatiblity to EMGD generated BIOS

[Jani Nikula]

On Tue, 23 Jun 2015, Andreas Lampersperger <lampersperger.andreas at heidenhain.de> wrote:
> When the i915.ko identify an eDP output on a valleyview
> board, it should be more slackly. The reason for that is,
> that BIOS DATA TABLES generated with intel BMP (Binary
> Modification Program) do not set bits for NOT_HDMI or
> DIGITAL_OUTPUT on the device type. Due to Adolfo
> Sanchez from Intel EMGD, this is not possible.
> To solve this problem and enable i915.ko on embedded
> vlv boards with eDP, we ignore this two bits.

Going through some old patches, this should be fixed by

commit 972e7d71c82ea70100b808695d5cf735c1df5ef8
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Sep 11 21:04:39 2015 +0300

    drm/i915: Ignore "digital output" and "not HDMI output" bits for eDP detection

BR,
Jani.

>
> Signed-off-by: Andreas Lampersperger <lampersperger.andreas at heidenhain.de>
> ---
>  drivers/gpu/drm/i915/intel_bios.h | 10 ++++++++++
>  drivers/gpu/drm/i915/intel_dp.c   | 10 ++++++++--
>  2 files changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
> index af0b476..c42161f 100644
> --- a/drivers/gpu/drm/i915/intel_bios.h
> +++ b/drivers/gpu/drm/i915/intel_bios.h
> @@ -742,6 +742,16 @@ int intel_parse_bios(struct drm_device *dev);
>  	 DEVICE_TYPE_DIGITAL_OUTPUT | \
>  	 DEVICE_TYPE_ANALOG_OUTPUT)
>  
> +/*
> + * We dont look on DEVICE_TYPE_NOT_HDMI_OUTPUT an DEVICE_TYPE_DIGITAL_OUTPUT
> + * on valleyview, because intels BMP-generated BIOS don't sets these 
> + * BITS for eDP ports
> + */ 
> +#define DEVICE_TYPE_eDP_BITS_VLV \
> +	(DEVICE_TYPE_eDP_BITS &\
> +	 (~ DEVICE_TYPE_NOT_HDMI_OUTPUT ) &\
> +	 (~ DEVICE_TYPE_DIGITAL_OUTPUT ) )
> +	   
>  /* define the DVO port for HDMI output type */
>  #define		DVO_B		1
>  #define		DVO_C		2
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index f52eef1..51c753f 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -5036,6 +5036,7 @@ bool intel_dp_is_edp(struct drm_device *dev, enum port port)
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	union child_device_config *p_child;
>  	int i;
> +	u16 eDP_bits;
>  	static const short port_mapping[] = {
>  		[PORT_B] = PORT_IDPB,
>  		[PORT_C] = PORT_IDPC,
> @@ -5047,13 +5048,18 @@ bool intel_dp_is_edp(struct drm_device *dev, enum port port)
>  
>  	if (!dev_priv->vbt.child_dev_num)
>  		return false;
> +	
> +	if (IS_VALLEYVIEW(dev))
> +	  eDP_bits = DEVICE_TYPE_eDP_BITS_VLV;
> +	else
> +	  eDP_bits = DEVICE_TYPE_eDP_BITS;
>  
>  	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
>  		p_child = dev_priv->vbt.child_dev + i;
>  
>  		if (p_child->common.dvo_port == port_mapping[port] &&
> -		    (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
> -		    (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
> +		    (p_child->common.device_type & eDP_bits) ==
> +		    (DEVICE_TYPE_eDP & eDP_bits))
>  			return true;
>  	}
>  	return false;
> -- 
> 2.1.4
>
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-- 
Jani Nikula, Intel Open Source Technology Center