[Intel-gfx] [PATCH v3 1/5] drm/i915/bxt: Corrected the guid for bxt.

[Imre Deak]

On Tue, Dec 27, 2016 at 06:59:52PM +0530, Animesh Manna wrote:
> Guid is changed for bxt platform, so corrected the guid for bxt.
> 
> v1: Initial version as RFC.
> 
> v2: Based on review comment from Jani and David,
> have kept guid as binary format.
> 
> v3: Based on review comment from Chris and Jani,
>     - kept the const for guid.
>     - corrected the file permission.
> 
> Signed-off-by: Ananth Krishna R <ananth.krishna.r at intel.com>
> Signed-off-by: Bharath K Veera <bharath.k.veera at intel.com>
> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_acpi.c | 32 +++++++++++++++++++++++++-------
>  1 file changed, 25 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
> index eb638a1..5c49cef 100644
> --- a/drivers/gpu/drm/i915/intel_acpi.c
> +++ b/drivers/gpu/drm/i915/intel_acpi.c
> @@ -23,6 +23,14 @@ static const u8 intel_dsm_guid[] = {
>  	0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
>  };
>  
> +static const u8 intel_dsm_guid_bxt[] = {
> +	0xc6, 0x41, 0x5b, 0x3e,
> +	0x1d, 0xeb,
> +	0x60, 0x42,
> +	0x9d, 0x15,
> +	0xc7, 0x1f, 0xba, 0xda, 0xe4, 0x14
> +};
> +
>  static char *intel_dsm_port_name(u8 id)
>  {
>  	switch (id) {
> @@ -113,20 +121,30 @@ static void intel_dsm_platform_mux_info(void)
>  static bool intel_dsm_pci_probe(struct pci_dev *pdev)
>  {
>  	acpi_handle dhandle;
> +	struct drm_device *dev = pci_get_drvdata(pdev);
> +	struct drm_i915_private *dev_priv = to_i915(dev);
>  
>  	dhandle = ACPI_HANDLE(&pdev->dev);
>  	if (!dhandle)
>  		return false;
>  
> -	if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
> -			    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
> -		DRM_DEBUG_KMS("no _DSM method for intel device\n");
> -		return false;
> -	}
> -
>  	intel_dsm_priv.dhandle = dhandle;
> -	intel_dsm_platform_mux_info();
>  
> +	if (IS_BROXTON(dev_priv)) {
> +		union acpi_object *obj;
> +
> +		obj = acpi_evaluate_dsm(dhandle, intel_dsm_guid_bxt,
> +					INTEL_DSM_REVISION_ID, 0, NULL);
> +		if (!obj)
> +			return false;
> +	} else {
> +		if (acpi_check_dsm(dhandle, intel_dsm_guid,
> +				    INTEL_DSM_REVISION_ID,
> +				    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO))
> +			intel_dsm_platform_mux_info();
> +		else
> +			return false;
> +	}

So the INTEL_DSM_FN_PLATFORM_MUX_INFO handling is removed for BXT, which
isn't mentioned in the commit log. It doesn't seem correct either since
it's used to display the switcheroo DSM switching method, which is
unrelated to the low-level HPD handling you are adding here. So imo just
handle the two things separately adding a new function for the HPD stuff
and calling it from intel_dsm_detect().

>  	return true;
>  }
>  
> -- 
> 2.7.4
> 
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