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drm/i915/display: Aux Enable and Display powerwell timeouts

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From XE3P we can now poll if the AUX power is up or down define the
timeouts for each respectively.

Bspec: 68967
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://patch.msgid.link/20251101032513.4171255-25-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal 2025-11-01 08:55:12 +05:30
parent 9dcf183632
commit e34c635694
1 changed files with 20 additions and 2 deletions
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22
drivers/gpu/drm/i915/display/intel_display_power_well.c
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@ -1864,18 +1864,36 @@ static void xelpdp_aux_power_well_enable(struct intel_display *display,
* expected to just wait a fixed 600us after raising the request
* bit.
*/
usleep_range(600, 1200);
if (DISPLAY_VER(display) >= 35) {
if (intel_de_wait_for_set(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
XELPDP_DP_AUX_CH_CTL_POWER_STATUS, 2))
drm_warn(display->drm,
"Timeout waiting for PHY %c AUX channel power to be up\n",
phy_name(phy));
} else {
usleep_range(600, 1200);
}
}
static void xelpdp_aux_power_well_disable(struct intel_display *display,
struct i915_power_well *power_well)
{
enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
enum phy phy = icl_aux_pw_to_phy(display, power_well);
intel_de_rmw(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
XELPDP_DP_AUX_CH_CTL_POWER_REQUEST,
0);
usleep_range(10, 30);
if (DISPLAY_VER(display) >= 35) {
if (intel_de_wait_for_clear(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
XELPDP_DP_AUX_CH_CTL_POWER_STATUS, 1))
drm_warn(display->drm,
"Timeout waiting for PHY %c AUX channel to powerdown\n",
phy_name(phy));
} else {
usleep_range(10, 30);
}
}
static bool xelpdp_aux_power_well_enabled(struct intel_display *display,