Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/i915/display: Aux Enable and Display powerwell timeouts
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
+20
-2
+20
-2
drivers/gpu/drm/i915/display/intel_display_power_well.c
+20
-2
drivers/gpu/drm/i915/display/intel_display_power_well.c
···
1864
1864
* expected to just wait a fixed 600us after raising the request
1865
1865
* bit.
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1866
*/
1867
-
usleep_range(600, 1200);
1867
+
if (DISPLAY_VER(display) >= 35) {
1868
+
if (intel_de_wait_for_set(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
1869
+
XELPDP_DP_AUX_CH_CTL_POWER_STATUS, 2))
1870
+
drm_warn(display->drm,
1871
+
"Timeout waiting for PHY %c AUX channel power to be up\n",
1872
+
phy_name(phy));
1873
+
} else {
1874
+
usleep_range(600, 1200);
1875
+
}
1868
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}
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static void xelpdp_aux_power_well_disable(struct intel_display *display,
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1879
struct i915_power_well *power_well)
1872
1880
{
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enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch;
1882
+
enum phy phy = icl_aux_pw_to_phy(display, power_well);
1874
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1875
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intel_de_rmw(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
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XELPDP_DP_AUX_CH_CTL_POWER_REQUEST,
1877
1886
0);
1878
-
usleep_range(10, 30);
1887
+
1888
+
if (DISPLAY_VER(display) >= 35) {
1889
+
if (intel_de_wait_for_clear(display, XELPDP_DP_AUX_CH_CTL(display, aux_ch),
1890
+
XELPDP_DP_AUX_CH_CTL_POWER_STATUS, 1))
1891
+
drm_warn(display->drm,
1892
+
"Timeout waiting for PHY %c AUX channel to powerdown\n",
1893
+
phy_name(phy));
1894
+
} else {
1895
+
usleep_range(10, 30);
1896
+
}
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1897
}
1880
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1899
static bool xelpdp_aux_power_well_enabled(struct intel_display *display,