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drm/i915/dmc: Extract is_event_handler()

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Extract the helper to determine if the mmio reg+data are the
event handler register (DMC_EVT_CTL) for a specific event.
We'll have another use for this for runtime event handler
enable/disable.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250512103358.15724-7-ville.syrjala@linux.intel.com
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Ville Syrjälä
2025-05-12 13:33:57 +03:00
parent 583710251f
commit d9dd810dd4
1 changed files with 11 additions and 2 deletions
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13
drivers/gpu/drm/i915/display/intel_dmc.c
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@@ -567,6 +567,15 @@ static bool is_dmc_evt_htp_reg(struct intel_display *display,
return offset >= start && offset < end;
}
static bool is_event_handler(struct intel_display *display,
enum intel_dmc_id dmc_id,
unsigned int event_id,
i915_reg_t reg, u32 data)
{
return is_dmc_evt_ctl_reg(display, dmc_id, reg) &&
REG_FIELD_GET(DMC_EVT_CTL_EVENT_ID_MASK, data) == event_id;
}
/**
* intel_dmc_block_pkgc() - block PKG C-state
* @display: display instance
@@ -625,12 +634,12 @@ static bool disable_dmc_evt(struct intel_display *display,
/* also disable the flip queue event on the main DMC on TGL */
if (display->platform.tigerlake &&
REG_FIELD_GET(DMC_EVT_CTL_EVENT_ID_MASK, data) == MAINDMC_EVENT_CLK_MSEC)
is_event_handler(display, dmc_id, MAINDMC_EVENT_CLK_MSEC, reg, data))
return true;
/* also disable the HRR event on the main DMC on TGL/ADLS */
if ((display->platform.tigerlake || display->platform.alderlake_s) &&
REG_FIELD_GET(DMC_EVT_CTL_EVENT_ID_MASK, data) == MAINDMC_EVENT_VBLANK_A)
is_event_handler(display, dmc_id, MAINDMC_EVENT_VBLANK_A, reg, data))
return true;
return false;