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drm/i915/de: Add intel_de_read16()

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We'll need a replacement for intel_uncore_read16() in order to
untangle intel_mchbar_read16() from uncore. As with the 8 bit
counterpart this doesn't need to work on modern platforms
so we can forgo all the DMC wakelock stuff and whatnot.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260331154259.24600-8-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2026-03-31 18:42:54 +03:00
parent a076686aca
commit ed3643fb13
2 changed files with 9 additions and 0 deletions
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8
drivers/gpu/drm/i915/display/intel_de.c
View File

@ -176,3 +176,11 @@ void intel_de_write8(struct intel_display *display, i915_reg_t reg, u8 val)
intel_uncore_write8(__to_uncore(display), reg, val);
}
u16 intel_de_read16(struct intel_display *display, i915_reg_t reg)
{
/* this is only used on MCHBAR registers on pre-SNB */
drm_WARN_ON(display->drm, DISPLAY_VER(display) >= 6);
return intel_uncore_read16(__to_uncore(display), reg);
}

1
drivers/gpu/drm/i915/display/intel_de.h
View File

@ -19,6 +19,7 @@ static inline struct intel_uncore *__to_uncore(struct intel_display *display)
u8 intel_de_read8(struct intel_display *display, i915_reg_t reg);
void intel_de_write8(struct intel_display *display, i915_reg_t reg, u8 val);
u16 intel_de_read16(struct intel_display *display, i915_reg_t reg);
static inline u32
intel_de_read(struct intel_display *display, i915_reg_t reg)