Re: [PATCH] drm/i915: Introduce concept of a sub-platform

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On Fri, Mar 15, 2019 at 12:26:33PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> 
> Concept of a sub-platform already exist in our code (like ULX and ULT
> platform variants and similar),implemented via the macros which check a
> list of device ids to determine a match.
> 
> With this patch we consolidate device ids checking into a single function
> called during early driver load.
> 
> A few low bits in the platform mask are reserved for sub-platform
> identification and defined as a per-platform namespace.
> 
> At the same time it future proofs the platform_mask handling by preparing
> the code for easy extending, and tidies the very verbose WARN strings
> generated when IS_PLATFORM macros are embedded into a WARN type
> statements.
> 
> The approach is also beneficial to driver size, with an combined shrink of
> code and strings of around 1.7 kiB.
> 
> v2: Fixed IS_SUBPLATFORM. Updated commit msg.
> v3: Chris was right, there is an ordering problem.
> 
> v4:
>  * Catch-up with new sub-platforms.
>  * Rebase for RUNTIME_INFO.
>  * Drop subplatform mask union tricks and convert platform_mask to an
>    array for extensibility.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> Cc: Jose Souza <jose.souza@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/i915_drv.c          |   7 +-
>  drivers/gpu/drm/i915/i915_drv.h          | 110 +++++++++++++++--------
>  drivers/gpu/drm/i915/i915_pci.c          |   2 +-
>  drivers/gpu/drm/i915/intel_device_info.c |  79 ++++++++++++++++
>  drivers/gpu/drm/i915/intel_device_info.h |  28 +++++-
>  5 files changed, 179 insertions(+), 47 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 0d743907e7bc..3218350cd225 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -863,6 +863,8 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv)
>  	if (i915_inject_load_failure())
>  		return -ENODEV;
>  
> +	intel_device_info_subplatform_init(dev_priv);
> +
>  	spin_lock_init(&dev_priv->irq_lock);
>  	spin_lock_init(&dev_priv->gpu_error.lock);
>  	mutex_init(&dev_priv->backlight_lock);
> @@ -1752,10 +1754,11 @@ static void i915_welcome_messages(struct drm_i915_private *dev_priv)
>  	if (drm_debug & DRM_UT_DRIVER) {
>  		struct drm_printer p = drm_debug_printer("i915 device info:");
>  
> -		drm_printf(&p, "pciid=0x%04x rev=0x%02x platform=%s gen=%i\n",
> +		drm_printf(&p, "pciid=0x%04x rev=0x%02x platform=%s (%x) gen=%i\n",
>  			   INTEL_DEVID(dev_priv),
>  			   INTEL_REVID(dev_priv),
>  			   intel_platform_name(INTEL_INFO(dev_priv)->platform),
> +			   RUNTIME_INFO(dev_priv)->platform_mask[INTEL_INFO(dev_priv)->platform / (BITS_PER_TYPE(RUNTIME_INFO(dev_priv)->platform_mask[0]) - INTEL_SUBPLATFORM_BITS)],
>  			   INTEL_GEN(dev_priv));
>  
>  		intel_device_info_dump_flags(INTEL_INFO(dev_priv), &p);
> @@ -1798,8 +1801,6 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
>  	memcpy(device_info, match_info, sizeof(*device_info));
>  	RUNTIME_INFO(i915)->device_id = pdev->device;
>  
> -	BUILD_BUG_ON(INTEL_MAX_PLATFORMS >
> -		     BITS_PER_TYPE(device_info->platform_mask));
>  	BUG_ON(device_info->gen > BITS_PER_TYPE(device_info->gen_mask));
>  
>  	return i915;
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index dccb6006aabf..34282cf66cb0 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2281,7 +2281,46 @@ static inline unsigned int i915_sg_segment_size(void)
>  #define IS_REVID(p, since, until) \
>  	(INTEL_REVID(p) >= (since) && INTEL_REVID(p) <= (until))
>  
> -#define IS_PLATFORM(dev_priv, p) (INTEL_INFO(dev_priv)->platform_mask & BIT(p))
> +#define __IS_PLATFORM(dev_priv, p) \
> +({ \
> +	const unsigned int pbits__ = \
> +		BITS_PER_TYPE(RUNTIME_INFO(dev_priv)->platform_mask[0]) - \
> +		INTEL_SUBPLATFORM_BITS; \
> +	const unsigned int pi__ = (p) / pbits__; \
> +	const unsigned int pb__ = (p) % pbits__ + INTEL_SUBPLATFORM_BITS; \
> +\
> +	BUILD_BUG_ON(!__builtin_constant_p(p)); \
> +\
> +	(RUNTIME_INFO(dev_priv)->platform_mask[pi__] & BIT(pb__)); \
> +})
> +
> +#define __IS_SUBPLATFORM(dev_priv, p, s) \
> +({ \
> +	const unsigned int pbits__ = \
> +		BITS_PER_TYPE(RUNTIME_INFO(dev_priv)->platform_mask[0]) - \
> +		INTEL_SUBPLATFORM_BITS; \
> +	const unsigned int pi__ = (p) / pbits__; \
> +	const unsigned int pb__ = (p) % pbits__ + INTEL_SUBPLATFORM_BITS; \
> +\
> +	BUILD_BUG_ON(!__builtin_constant_p(p)); \
> +	BUILD_BUG_ON(!__builtin_constant_p(s)); \
> +	BUILD_BUG_ON((s) >= INTEL_SUBPLATFORM_BITS); \
> +\
> +	(RUNTIME_INFO(dev_priv)->platform_mask[pi__] & (BIT(pb__) | BIT(s))); \
> +})
> +
> +static inline bool
> +IS_PLATFORM(const struct drm_i915_private *i915, enum intel_platform p)
> +{
> +	return __IS_PLATFORM(i915, p);
> +}
> +
> +static inline bool
> +IS_SUBPLATFORM(const struct drm_i915_private *i915,
> +	       enum intel_platform p, unsigned int s)
> +{
> +	return __IS_SUBPLATFORM(i915, p, s);
> +}
>  
>  #define IS_I830(dev_priv)	IS_PLATFORM(dev_priv, INTEL_I830)
>  #define IS_I845G(dev_priv)	IS_PLATFORM(dev_priv, INTEL_I845G)
> @@ -2296,11 +2335,15 @@ static inline unsigned int i915_sg_segment_size(void)
>  #define IS_G45(dev_priv)	IS_PLATFORM(dev_priv, INTEL_G45)
>  #define IS_GM45(dev_priv)	IS_PLATFORM(dev_priv, INTEL_GM45)
>  #define IS_G4X(dev_priv)	(IS_G45(dev_priv) || IS_GM45(dev_priv))
> -#define IS_PINEVIEW_G(dev_priv)	(INTEL_DEVID(dev_priv) == 0xa001)
> -#define IS_PINEVIEW_M(dev_priv)	(INTEL_DEVID(dev_priv) == 0xa011)
> +#define IS_PINEVIEW_G(dev_priv)	\
> +	IS_SUBPLATFORM(dev_priv, INTEL_PINEVIEW, INTEL_SUBPLATFORM_PINEVIEW_G)
> +#define IS_PINEVIEW_M(dev_priv)	\
> +	IS_SUBPLATFORM(dev_priv, INTEL_PINEVIEW, INTEL_SUBPLATFORM_PINEVIEW_M)
>  #define IS_PINEVIEW(dev_priv)	IS_PLATFORM(dev_priv, INTEL_PINEVIEW)

I have a feeling we should just use the normal IS_MOBILE() thing
here. But untangling that mess might be a bit of work.

>  #define IS_G33(dev_priv)	IS_PLATFORM(dev_priv, INTEL_G33)
> -#define IS_IRONLAKE_M(dev_priv)	(INTEL_DEVID(dev_priv) == 0x0046)
> +#define IS_IRONLAKE(dev_priv)	IS_PLATFORM(dev_priv, INTEL_IRONLAKE)
> +#define IS_IRONLAKE_M(dev_priv)	\
> +	IS_SUBPLATFORM(dev_priv, INTEL_IRONLAKE, INTEL_SUBPLATFORM_IRONLAKE_M)

This is clearly just IS_MOBILE().

Or we just keep the current pci id checks. Frankly I see no benefit in
abstracting these few exceptions.

>  #define IS_IVYBRIDGE(dev_priv)	IS_PLATFORM(dev_priv, INTEL_IVYBRIDGE)
>  #define IS_IVB_GT1(dev_priv)	(IS_IVYBRIDGE(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 1)
> @@ -2318,42 +2361,31 @@ static inline unsigned int i915_sg_segment_size(void)
>  #define IS_MOBILE(dev_priv)	(INTEL_INFO(dev_priv)->is_mobile)
>  #define IS_HSW_EARLY_SDV(dev_priv) (IS_HASWELL(dev_priv) && \
>  				    (INTEL_DEVID(dev_priv) & 0xFF00) == 0x0C00)
> -#define IS_BDW_ULT(dev_priv)	(IS_BROADWELL(dev_priv) && \
> -				 ((INTEL_DEVID(dev_priv) & 0xf) == 0x6 ||	\
> -				 (INTEL_DEVID(dev_priv) & 0xf) == 0xb ||	\
> -				 (INTEL_DEVID(dev_priv) & 0xf) == 0xe))
> -/* ULX machines are also considered ULT. */
> -#define IS_BDW_ULX(dev_priv)	(IS_BROADWELL(dev_priv) && \
> -				 (INTEL_DEVID(dev_priv) & 0xf) == 0xe)
> +#define IS_BDW_ULT(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_BROADWELL, INTEL_SUBPLATFORM_ULT)
> +#define IS_BDW_ULX(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_BROADWELL, INTEL_SUBPLATFORM_ULX)
>  #define IS_BDW_GT3(dev_priv)	(IS_BROADWELL(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 3)
> -#define IS_HSW_ULT(dev_priv)	(IS_HASWELL(dev_priv) && \
> -				 (INTEL_DEVID(dev_priv) & 0xFF00) == 0x0A00)
> +#define IS_HSW_ULT(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_HASWELL, INTEL_SUBPLATFORM_ULT)
>  #define IS_HSW_GT3(dev_priv)	(IS_HASWELL(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 3)
>  #define IS_HSW_GT1(dev_priv)	(IS_HASWELL(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 1)
>  /* ULX machines are also considered ULT. */
> -#define IS_HSW_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x0A0E || \
> -				 INTEL_DEVID(dev_priv) == 0x0A1E)
> -#define IS_SKL_ULT(dev_priv)	(INTEL_DEVID(dev_priv) == 0x1906 || \
> -				 INTEL_DEVID(dev_priv) == 0x1913 || \
> -				 INTEL_DEVID(dev_priv) == 0x1916 || \
> -				 INTEL_DEVID(dev_priv) == 0x1921 || \
> -				 INTEL_DEVID(dev_priv) == 0x1926)
> -#define IS_SKL_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x190E || \
> -				 INTEL_DEVID(dev_priv) == 0x1915 || \
> -				 INTEL_DEVID(dev_priv) == 0x191E)
> -#define IS_KBL_ULT(dev_priv)	(INTEL_DEVID(dev_priv) == 0x5906 || \
> -				 INTEL_DEVID(dev_priv) == 0x5913 || \
> -				 INTEL_DEVID(dev_priv) == 0x5916 || \
> -				 INTEL_DEVID(dev_priv) == 0x5921 || \
> -				 INTEL_DEVID(dev_priv) == 0x5926)
> -#define IS_KBL_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x590E || \
> -				 INTEL_DEVID(dev_priv) == 0x5915 || \
> -				 INTEL_DEVID(dev_priv) == 0x591E)
> -#define IS_AML_ULX(dev_priv)	(INTEL_DEVID(dev_priv) == 0x591C || \
> -				 INTEL_DEVID(dev_priv) == 0x87C0)
> +#define IS_HSW_ULX(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_HASWELL, INTEL_SUBPLATFORM_ULX)
> +#define IS_SKL_ULT(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_SKYLAKE, INTEL_SUBPLATFORM_ULT)
> +#define IS_SKL_ULX(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_SKYLAKE, INTEL_SUBPLATFORM_ULX)
> +#define IS_KBL_ULT(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_ULT)
> +#define IS_KBL_ULX(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_ULX)
> +#define IS_AML_ULX(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_AML_ULX)

Why is AML_ULX different from normal ULX?

>  #define IS_SKL_GT2(dev_priv)	(IS_SKYLAKE(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 2)
>  #define IS_SKL_GT3(dev_priv)	(IS_SKYLAKE(dev_priv) && \
> @@ -2364,16 +2396,16 @@ static inline unsigned int i915_sg_segment_size(void)
>  				 INTEL_INFO(dev_priv)->gt == 2)
>  #define IS_KBL_GT3(dev_priv)	(IS_KABYLAKE(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 3)
> -#define IS_CFL_ULT(dev_priv)	(IS_COFFEELAKE(dev_priv) && \
> -				 (INTEL_DEVID(dev_priv) & 0x00F0) == 0x00A0)
> +#define IS_CFL_ULT(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_COFFEELAKE, INTEL_SUBPLATFORM_ULT)
>  #define IS_CFL_GT2(dev_priv)	(IS_COFFEELAKE(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 2)
>  #define IS_CFL_GT3(dev_priv)	(IS_COFFEELAKE(dev_priv) && \
>  				 INTEL_INFO(dev_priv)->gt == 3)
> -#define IS_CNL_WITH_PORT_F(dev_priv)   (IS_CANNONLAKE(dev_priv) && \
> -					(INTEL_DEVID(dev_priv) & 0x0004) == 0x0004)
> -#define IS_ICL_WITH_PORT_F(dev_priv)   (IS_ICELAKE(dev_priv) && \
> -					INTEL_DEVID(dev_priv) != 0x8A51)
> +#define IS_CNL_WITH_PORT_F(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_CANNONLAKE, INTEL_SUBPLATFORM_PORTF)
> +#define IS_ICL_WITH_PORT_F(dev_priv) \
> +	IS_SUBPLATFORM(dev_priv, INTEL_ICELAKE, INTEL_SUBPLATFORM_PORTF)

God that PORTF thing is ugly. I would suggest we just add port_mask
or something along those lines into the device info.

Then we could perhaps even avoid adding more and more branches to
intel_setup_outputs(). Although I'm not sure we need anything for that
since we'll look at the VBT anyway (which *maybe* doesn't advertize
ports that aren't present?).

>  
>  #define IS_ALPHA_SUPPORT(intel_info) ((intel_info)->is_alpha_support)
>  
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 3cf697e8f1fa..2b042618e3ca 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -32,7 +32,7 @@
>  #include "i915_globals.h"
>  #include "i915_selftest.h"
>  
> -#define PLATFORM(x) .platform = (x), .platform_mask = BIT(x)
> +#define PLATFORM(x) .platform = (x)
>  #define GEN(x) .gen = (x), .gen_mask = BIT((x) - 1)
>  
>  #define I845_PIPE_OFFSETS \
> diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
> index aac19b1c419c..b8a7e17cb443 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.c
> +++ b/drivers/gpu/drm/i915/intel_device_info.c
> @@ -707,6 +707,85 @@ static u32 read_timestamp_frequency(struct drm_i915_private *dev_priv)
>  	return 0;
>  }
>  
> +void intel_device_info_subplatform_init(struct drm_i915_private *i915)
> +{
> +	const unsigned int pbits =
> +		BITS_PER_TYPE(RUNTIME_INFO(i915)->platform_mask[0]) -
> +		INTEL_SUBPLATFORM_BITS;
> +	const unsigned int pi = INTEL_INFO(i915)->platform / pbits;
> +	const unsigned int pb =
> +		INTEL_INFO(i915)->platform % pbits + INTEL_SUBPLATFORM_BITS;
> +	struct intel_runtime_info *info = RUNTIME_INFO(i915);
> +	u16 devid = INTEL_DEVID(i915);
> +
> +	BUILD_BUG_ON(INTEL_MAX_PLATFORMS >
> +		     pbits * ARRAY_SIZE(RUNTIME_INFO(i915)->platform_mask));
> +
> +	info->platform_mask[pi] = BIT(pb);
> +
> +	if (IS_PINEVIEW(i915)) {
> +		if (devid == 0xa001)
> +			info->platform_mask[pi] |=
> +				BIT(INTEL_SUBPLATFORM_PINEVIEW_G);
> +		else if (devid == 0xa011)
> +			info->platform_mask[pi] |=
> +				BIT(INTEL_SUBPLATFORM_PINEVIEW_M);
> +	} else if (IS_IRONLAKE(i915)) {
> +		if (devid == 0x0046)
> +			info->platform_mask[pi] |=
> +				BIT(INTEL_SUBPLATFORM_IRONLAKE_M);
> +	} else if (IS_HASWELL(i915)) {
> +		if ((devid & 0xFF00) == 0x0A00)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULT);
> +		/* ULX machines are also considered ULT. */
> +		if (devid == 0x0A0E || devid == 0x0A1E)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULX);
> +	} else if (IS_BROADWELL(i915)) {
> +		if ((devid & 0xf) == 0x6 ||
> +		    (devid & 0xf) == 0xb ||
> +		    (devid & 0xf) == 0xe)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULT);
> +		/* ULX machines are also considered ULT. */
> +		if ((devid & 0xf) == 0xe)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULX);
> +	} else if (IS_SKYLAKE(i915)) {
> +		if (devid == 0x1906 ||
> +		    devid == 0x1913 ||
> +		    devid == 0x1916 ||
> +		    devid == 0x1921 ||
> +		    devid == 0x1926)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULT);
> +		else if (devid == 0x190E ||
> +			 devid == 0x1915 ||
> +			 devid == 0x191E)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULX);
> +	} else if (IS_KABYLAKE(i915)) {
> +		if (devid == 0x5906 ||
> +		    devid == 0x5913 ||
> +		    devid == 0x5916 ||
> +		    devid == 0x5921 ||
> +		    devid  == 0x5926)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULT);
> +		else if (devid == 0x590E ||
> +			 devid == 0x5915 ||
> +			 devid == 0x591E)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULX);
> +		else if (devid == 0x591C ||
> +			 devid == 0x87C0)
> +			info->platform_mask[pi] |=
> +				BIT(INTEL_SUBPLATFORM_AML_ULX);
> +	} else if (IS_COFFEELAKE(i915)) {
> +		if ((devid & 0x00F0) == 0x00A0)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_ULT);
> +	} else if (IS_CANNONLAKE(i915)) {
> +		if ((devid & 0x0004) == 0x0004)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_PORTF);
> +	} else if (IS_ICELAKE(i915)) {
> +		if (devid != 0x8A51)
> +			info->platform_mask[pi] |= BIT(INTEL_SUBPLATFORM_PORTF);
> +	}
> +}
> +
>  /**
>   * intel_device_info_runtime_init - initialize runtime info
>   * @dev_priv: the i915 device
> diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
> index 047d10bdd455..b03fbd2e451a 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.h
> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> @@ -44,7 +44,7 @@ enum intel_platform {
>  	INTEL_I915G,
>  	INTEL_I915GM,
>  	INTEL_I945G,
> -	INTEL_I945GM,
> +	INTEL_I945GM = 8,
>  	INTEL_G33,
>  	INTEL_PINEVIEW,
>  	/* gen4 */
> @@ -55,7 +55,7 @@ enum intel_platform {
>  	/* gen5 */
>  	INTEL_IRONLAKE,
>  	/* gen6 */
> -	INTEL_SANDYBRIDGE,
> +	INTEL_SANDYBRIDGE = 16,
>  	/* gen7 */
>  	INTEL_IVYBRIDGE,
>  	INTEL_VALLEYVIEW,
> @@ -66,7 +66,7 @@ enum intel_platform {
>  	/* gen9 */
>  	INTEL_SKYLAKE,
>  	INTEL_BROXTON,
> -	INTEL_KABYLAKE,
> +	INTEL_KABYLAKE = 24,

Too much magic. Looks rather fragile.

>  	INTEL_GEMINILAKE,
>  	INTEL_COFFEELAKE,
>  	/* gen10 */
> @@ -76,6 +76,24 @@ enum intel_platform {
>  	INTEL_MAX_PLATFORMS
>  };
>  
> +/*
> + * Subplatform bits share the same namespace per parent platform. In other words
> + * it is fine for the same bit to be used on multiple parent platforms.
> + */
> +
> +#define INTEL_SUBPLATFORM_BITS (3)
> +
> +#define INTEL_SUBPLATFORM_IRONLAKE_M (0)
> +
> +#define INTEL_SUBPLATFORM_PINEVIEW_G (0)
> +#define INTEL_SUBPLATFORM_PINEVIEW_M (1)
> +
> +#define INTEL_SUBPLATFORM_ULT	  (0)
> +#define INTEL_SUBPLATFORM_ULX	  (1)
> +#define INTEL_SUBPLATFORM_AML_ULX (2)
> +
> +#define INTEL_SUBPLATFORM_PORTF (0)
> +
>  enum intel_ppgtt {
>  	INTEL_PPGTT_NONE = I915_GEM_PPGTT_NONE,
>  	INTEL_PPGTT_ALIASING = I915_GEM_PPGTT_ALIASING,
> @@ -160,7 +178,6 @@ struct intel_device_info {
>  	intel_engine_mask_t engine_mask; /* Engines supported by the HW */
>  
>  	enum intel_platform platform;
> -	u32 platform_mask;
>  
>  	enum intel_ppgtt ppgtt;
>  	unsigned int page_sizes; /* page sizes supported by the HW */
> @@ -195,6 +212,8 @@ struct intel_device_info {
>  };
>  
>  struct intel_runtime_info {
> +	u32 platform_mask[1];
> +
>  	u16 device_id;
>  
>  	u8 num_sprites[I915_MAX_PIPES];
> @@ -269,6 +288,7 @@ static inline void sseu_set_eus(struct sseu_dev_info *sseu,
>  
>  const char *intel_platform_name(enum intel_platform platform);
>  
> +void intel_device_info_subplatform_init(struct drm_i915_private *dev_priv);
>  void intel_device_info_runtime_init(struct drm_i915_private *dev_priv);
>  void intel_device_info_dump_flags(const struct intel_device_info *info,
>  				  struct drm_printer *p);
> -- 
> 2.19.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel
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