[PATCH 5.19 002/207] drm/i915/pps: Split pps_init_delays() into distinct parts

Greg Kroah-Hartman
2022-09-26T11:31:53Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

[ Upstream commit 75bd0d5e4eadb9ce3e9b6fb71971b6e87c38799e ]

Split each of the hw/vbt/spec PPS delay initialization into
separate functions to make the whole thing less cluttered.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220510104242.6099-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Stable-dep-of: 607f41768a1e ("drm/i915/dsi: filter invalid backlight and CABC ports")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/i915/display/intel_pps.c | 66 +++++++++++++++++-------
1 file changed, 48 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
index 5a598dd06039..5b72c892a6f2 100644
--- a/drivers/gpu/drm/i915/display/intel_pps.c
+++ b/drivers/gpu/drm/i915/display/intel_pps.c
@@ -1159,53 +1159,83 @@ intel_pps_verify_state(struct intel_dp *intel_dp)
}
}

-static void pps_init_delays(struct intel_dp *intel_dp)
+static void pps_init_delays_cur(struct intel_dp *intel_dp,
+ struct edp_power_seq *cur)
{
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
- struct edp_power_seq cur, vbt, spec,
- *final = &intel_dp->pps.pps_delays;

lockdep_assert_held(&dev_priv->pps_mutex);

- /* already initialized? */
- if (final->t11_t12 != 0)
- return;
+ intel_pps_readout_hw_state(intel_dp, cur);
+
+ intel_pps_dump_state(intel_dp, "cur", cur);
+}

- intel_pps_readout_hw_state(intel_dp, &cur);
+static void pps_init_delays_vbt(struct intel_dp *intel_dp,
+ struct edp_power_seq *vbt)
+{
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);

- intel_pps_dump_state(intel_dp, "cur", &cur);
+ *vbt = dev_priv->vbt.edp.pps;

- vbt = dev_priv->vbt.edp.pps;
/* On Toshiba Satellite P50-C-18C system the VBT T12 delay
* of 500ms appears to be too short. Ocassionally the panel
* just fails to power back on. Increasing the delay to 800ms
* seems sufficient to avoid this problem.
*/
if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
- vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
+ vbt->t11_t12 = max_t(u16, vbt->t11_t12, 1300 * 10);
drm_dbg_kms(&dev_priv->drm,
"Increasing T12 panel delay as per the quirk to %d\n",
- vbt.t11_t12);
+ vbt->t11_t12);
}
+
/* T11_T12 delay is special and actually in units of 100ms, but zero
* based in the hw (so we need to add 100 ms). But the sw vbt
* table multiplies it with 1000 to make it in units of 100usec,
* too. */
- vbt.t11_t12 += 100 * 10;
+ vbt->t11_t12 += 100 * 10;
+
+ intel_pps_dump_state(intel_dp, "vbt", vbt);
+}
+
+static void pps_init_delays_spec(struct intel_dp *intel_dp,
+ struct edp_power_seq *spec)
+{
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+ lockdep_assert_held(&dev_priv->pps_mutex);

/* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
* our hw here, which are all in 100usec. */
- spec.t1_t3 = 210 * 10;
- spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
- spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
- spec.t10 = 500 * 10;
+ spec->t1_t3 = 210 * 10;
+ spec->t8 = 50 * 10; /* no limit for t8, use t7 instead */
+ spec->t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
+ spec->t10 = 500 * 10;
/* This one is special and actually in units of 100ms, but zero
* based in the hw (so we need to add 100 ms). But the sw vbt
* table multiplies it with 1000 to make it in units of 100usec,
* too. */
- spec.t11_t12 = (510 + 100) * 10;
+ spec->t11_t12 = (510 + 100) * 10;
+
+ intel_pps_dump_state(intel_dp, "spec", spec);
+}
+
+static void pps_init_delays(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+ struct edp_power_seq cur, vbt, spec,
+ *final = &intel_dp->pps.pps_delays;
+
+ lockdep_assert_held(&dev_priv->pps_mutex);
+
+ /* already initialized? */
+ if (final->t11_t12 != 0)
+ return;

- intel_pps_dump_state(intel_dp, "vbt", &vbt);
+ pps_init_delays_cur(intel_dp, &cur);
+ pps_init_delays_vbt(intel_dp, &vbt);
+ pps_init_delays_spec(intel_dp, &spec);

/* Use the max of the register settings and vbt. If both are
* unset, fall back to the spec limits. */
--
2.35.1