> -----Original Message-----
> From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Jani
> Nikula
> Sent: Friday, February 7, 2025 3:48 PM
> To: intel-gfx@lists.freedesktop.org; intel...@lists.freedesktop.org
> Cc: Nikula, Jani <jani.nik...@intel.com>
> Subject: [PATCH 1/3] drm/i915/pch: Make LPT LP a dedicated PCH type
>
> Add PCH type PCH_LPT_LP and rename PCH_LPT to PCH_LPT_H for
> consistency. Keep the existing HAS_PCH_LPT*() macros, but express them in
> terms of the PCH types instead of looking at the device IDs directly. This
> makes the PCH checks independent of the PCH device IDs.
>
> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
LGTM,
Reviewed-by: Nemesa Garg <nemesa.g...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_backlight.c | 2 +-
> drivers/gpu/drm/i915/soc/intel_pch.c | 8 ++++----
> drivers/gpu/drm/i915/soc/intel_pch.h | 14 ++++++--------
> 3 files changed, 11 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c
> b/drivers/gpu/drm/i915/display/intel_backlight.c
> index 477b21af71a4..178dc6c8de80 100644
> --- a/drivers/gpu/drm/i915/display/intel_backlight.c
> +++ b/drivers/gpu/drm/i915/display/intel_backlight.c
> @@ -1829,7 +1829,7 @@ void intel_backlight_init_funcs(struct intel_panel
> *panel)
> panel->backlight.pwm_funcs = &bxt_pwm_funcs;
> } else if (INTEL_PCH_TYPE(i915) >= PCH_CNP) {
> panel->backlight.pwm_funcs = &cnp_pwm_funcs;
> - } else if (INTEL_PCH_TYPE(i915) >= PCH_LPT) {
> + } else if (INTEL_PCH_TYPE(i915) >= PCH_LPT_H) {
> if (HAS_PCH_LPT(i915))
> panel->backlight.pwm_funcs = &lpt_pwm_funcs;
> else
> diff --git a/drivers/gpu/drm/i915/soc/intel_pch.c
> b/drivers/gpu/drm/i915/soc/intel_pch.c
> index 9f7c9dbc178e..0370ccb6943c 100644
> --- a/drivers/gpu/drm/i915/soc/intel_pch.c
> +++ b/drivers/gpu/drm/i915/soc/intel_pch.c
> @@ -33,14 +33,14 @@ intel_pch_type(const struct drm_i915_private
> *dev_priv, unsigned short id)
> !IS_HASWELL(dev_priv) &&
> !IS_BROADWELL(dev_priv));
> drm_WARN_ON(&dev_priv->drm,
> IS_HASWELL_ULT(dev_priv) ||
> IS_BROADWELL_ULT(dev_priv));
> - return PCH_LPT;
> + return PCH_LPT_H;
> case INTEL_PCH_LPT_LP_DEVICE_ID_TYPE:
> drm_dbg_kms(&dev_priv->drm, "Found LynxPoint LP
> PCH\n");
> drm_WARN_ON(&dev_priv->drm,
> !IS_HASWELL(dev_priv) &&
> !IS_BROADWELL(dev_priv));
> drm_WARN_ON(&dev_priv->drm,
> !IS_HASWELL_ULT(dev_priv) &&
> !IS_BROADWELL_ULT(dev_priv));
> - return PCH_LPT;
> + return PCH_LPT_LP;
> case INTEL_PCH_WPT_DEVICE_ID_TYPE:
> drm_dbg_kms(&dev_priv->drm, "Found WildcatPoint
> PCH\n");
> drm_WARN_ON(&dev_priv->drm,
> @@ -48,7 +48,7 @@ intel_pch_type(const struct drm_i915_private *dev_priv,
> unsigned short id)
> drm_WARN_ON(&dev_priv->drm,
> IS_HASWELL_ULT(dev_priv) ||
> IS_BROADWELL_ULT(dev_priv));
> /* WPT is LPT compatible */
> - return PCH_LPT;
> + return PCH_LPT_H;
> case INTEL_PCH_WPT_LP_DEVICE_ID_TYPE:
> drm_dbg_kms(&dev_priv->drm, "Found WildcatPoint LP
> PCH\n");
> drm_WARN_ON(&dev_priv->drm,
> @@ -56,7 +56,7 @@ intel_pch_type(const struct drm_i915_private *dev_priv,
> unsigned short id)
> drm_WARN_ON(&dev_priv->drm,
> !IS_HASWELL_ULT(dev_priv) &&
> !IS_BROADWELL_ULT(dev_priv));
> /* WPT is LPT compatible */
> - return PCH_LPT;
> + return PCH_LPT_LP;
> case INTEL_PCH_SPT_DEVICE_ID_TYPE:
> drm_dbg_kms(&dev_priv->drm, "Found SunrisePoint
> PCH\n");
> drm_WARN_ON(&dev_priv->drm,
> diff --git a/drivers/gpu/drm/i915/soc/intel_pch.h
> b/drivers/gpu/drm/i915/soc/intel_pch.h
> index 89e89ede265d..bc926df14c45 100644
> --- a/drivers/gpu/drm/i915/soc/intel_pch.h
> +++ b/drivers/gpu/drm/i915/soc/intel_pch.h
> @@ -19,7 +19,8 @@ enum intel_pch {
> PCH_NONE = 0, /* No PCH present */
> PCH_IBX, /* Ibexpeak PCH */
> PCH_CPT, /* Cougarpoint/Pantherpoint PCH */
> - PCH_LPT, /* Lynxpoint/Wildcatpoint PCH */
> + PCH_LPT_H, /* Lynxpoint/Wildcatpoint H PCH */
> + PCH_LPT_LP, /* Lynxpoint/Wildcatpoint LP PCH */
> PCH_SPT, /* Sunrisepoint/Kaby Lake PCH */
> PCH_CNP, /* Cannon/Comet Lake PCH */
> PCH_ICP, /* Ice Lake/Jasper Lake PCH */
> @@ -72,13 +73,10 @@ enum intel_pch {
> #define HAS_PCH_ICP(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_ICP)
> #define HAS_PCH_CNP(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_CNP)
> #define HAS_PCH_SPT(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_SPT)
> -#define HAS_PCH_LPT(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_LPT)
> -#define HAS_PCH_LPT_LP(dev_priv) \
> - (INTEL_PCH_ID(dev_priv) == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE ||
> \
> - INTEL_PCH_ID(dev_priv) == INTEL_PCH_WPT_LP_DEVICE_ID_TYPE)
> -#define HAS_PCH_LPT_H(dev_priv) \
> - (INTEL_PCH_ID(dev_priv) == INTEL_PCH_LPT_DEVICE_ID_TYPE || \
> - INTEL_PCH_ID(dev_priv) == INTEL_PCH_WPT_DEVICE_ID_TYPE)
> +#define HAS_PCH_LPT_H(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_LPT_H)
> +#define HAS_PCH_LPT_LP(dev_priv) (INTEL_PCH_TYPE(dev_priv)
> == PCH_LPT_LP)
> +#define HAS_PCH_LPT(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_LPT_H || \
> + INTEL_PCH_TYPE(dev_priv)
> == PCH_LPT_LP)
> #define HAS_PCH_CPT(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_CPT)
> #define HAS_PCH_IBX(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_IBX)
> #define HAS_PCH_NOP(dev_priv)
> (INTEL_PCH_TYPE(dev_priv) == PCH_NOP)
> --
> 2.39.5
