On Mon, 2021-03-08 at 15:56 +0200, Jani Nikula wrote:
> Add new runtime info field for stepping. Add new helpers for accessing
> them. As we'll be switching platforms over to the new scheme
> incrementally, check for non-initialized steppings.
>
> In case a platform does not have separate display and gt steppings, it's
> okay to use a common shorthand. However, in this case the display
> stepping must not be initialized, and gt stepping is the single point of
> truth.
>
> v2: Rename stepping->step
>
> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 24 +++++++++++++++---------
> drivers/gpu/drm/i915/intel_device_info.h | 4 ++++
> drivers/gpu/drm/i915/intel_step.h | 14 ++++++++++++++
> 3 files changed, 33 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 02170edd6628..a543b1ad9ba9 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1274,6 +1274,21 @@ static inline struct drm_i915_private
> *pdev_to_i915(struct pci_dev *pdev)
> #define IS_REVID(p, since, until) \
> (INTEL_REVID(p) >= (since) && INTEL_REVID(p) <= (until))
>
>
> +#define INTEL_DISPLAY_STEP(__i915) (RUNTIME_INFO(__i915)->step.disp_stepping)
> +#define INTEL_GT_STEP(__i915) (RUNTIME_INFO(__i915)->step.gt_stepping)
> +
> +#define IS_DISPLAY_STEP(__i915, since, until) \
> + (drm_WARN_ON(&(__i915)->drm, INTEL_DISPLAY_STEP(__i915) == STEP_NONE), \
> + INTEL_DISPLAY_STEP(__i915) >= (since) && INTEL_DISPLAY_STEP(__i915) <=
> (until))
> +
> +#define IS_GT_STEP(__i915, since, until) \
> + (drm_WARN_ON(&(__i915)->drm, INTEL_GT_STEP(__i915) == STEP_NONE), \
> + INTEL_GT_STEP(__i915) >= (since) && INTEL_GT_STEP(__i915) <= (until))
> +
> +#define IS_STEP(p, since, until) \
> + (drm_WARN_ON(&(__i915)->drm, INTEL_DISPLAY_STEP(__i915) != STEP_NONE), \
(drm_WARN_ON(&(__i915)->drm, INTEL_DISPLAY_STEP(__i915) == STEP_NONE), \
But I don't think IS_STEP() is useful, better use IS_DISPLAY/GT_STEP even for
platforms with the same display and GT version.
With the change above:
Reviewed-by: José Roberto de Souza <jose.so...@intel.com>
> + INTEL_GT_STEP(__i915, since, until))
> +
> static __always_inline unsigned int
> __platform_mask_index(const struct intel_runtime_info *info,
> enum intel_platform p)
> @@ -1511,15 +1526,6 @@ enum {
> #define IS_JSL_EHL_REVID(p, since, until) \
> (IS_JSL_EHL(p) && IS_REVID(p, since, until))
>
>
> -enum {
> - STEP_A0,
> - STEP_A2,
> - STEP_B0,
> - STEP_B1,
> - STEP_C0,
> - STEP_D0,
> -};
> -
> static inline const struct i915_rev_steppings *
> tgl_stepping_get(struct drm_i915_private *dev_priv)
> {
> diff --git a/drivers/gpu/drm/i915/intel_device_info.h
> b/drivers/gpu/drm/i915/intel_device_info.h
> index d44f64b57b7a..f84569e8e711 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.h
> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> @@ -27,6 +27,8 @@
>
>
> #include <uapi/drm/i915_drm.h>
>
>
> +#include "intel_step.h"
> +
> #include "display/intel_display.h"
>
>
> #include "gt/intel_engine_types.h"
> @@ -225,6 +227,8 @@ struct intel_runtime_info {
> u8 num_scalers[I915_MAX_PIPES];
>
>
> u32 rawclk_freq;
> +
> + struct i915_rev_steppings step;
> };
>
>
> struct intel_driver_caps {
> diff --git a/drivers/gpu/drm/i915/intel_step.h
> b/drivers/gpu/drm/i915/intel_step.h
> index af922ae3bb4e..8b3ef19d935b 100644
> --- a/drivers/gpu/drm/i915/intel_step.h
> +++ b/drivers/gpu/drm/i915/intel_step.h
> @@ -22,4 +22,18 @@ extern const struct i915_rev_steppings
> tgl_uy_revid_step_tbl[TGL_UY_REVID_STEP_T
> extern const struct i915_rev_steppings
> tgl_revid_step_tbl[TGL_REVID_STEP_TBL_SIZE];
> extern const struct i915_rev_steppings
> adls_revid_step_tbl[ADLS_REVID_STEP_TBL_SIZE];
>
>
> +/*
> + * Symbolic steppings that do not match the hardware. These are valid both
> as gt
> + * and display steppings as symbolic names.
> + */
> +enum intel_step {
> + STEP_NONE = 0,
> + STEP_A0,
> + STEP_A2,
> + STEP_B0,
> + STEP_B1,
> + STEP_C0,
> + STEP_D0,
> +};
> +
> #endif /* __INTEL_STEP_H__ */
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