Restore our saved values for backlight. This way even with fastset on
S4 resume we will correctly restore the backlight to the active values.
Changes since v1:
- Call enable_backlight() when backlight.level is set. On suspend
backlight.enabled is always cleared, this makes it not a good
indicator. Also check for crtc->state->active.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Tolga Cakir <cevelnet@xxxxxxxxx>
Cc: Basil Eric Rabi <ericbasil.rabi@xxxxxxxxx>
Cc: Hans de Goede <jwrdegoede@xxxxxxxxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reported-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 2 ++
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_panel.c | 30 ++++++++++++++++++++++++++++
3 files changed, 33 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2c3f3f68d506..86e7b145fd98 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15887,7 +15887,9 @@ void intel_display_resume(struct drm_device *dev)
if (!ret)
ret = __intel_display_resume(dev, state, &ctx);
+ intel_panel_restore_backlight(dev_priv);
intel_enable_ipc(dev_priv);
+
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d08f08f607dd..1fa6e167ddd6 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2000,6 +2000,7 @@ int intel_panel_init(struct intel_panel *panel,
struct drm_display_mode *fixed_mode,
struct drm_display_mode *downclock_mode);
void intel_panel_fini(struct intel_panel *panel);
+void intel_panel_restore_backlight(struct drm_i915_private *dev_priv);
void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
struct drm_display_mode *adjusted_mode);
void intel_pch_panel_fitting(struct intel_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index ee3e0842d542..799284fcd57d 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1903,6 +1903,36 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
}
}
+void intel_panel_restore_backlight(struct drm_i915_private *dev_priv)
+{
+ struct intel_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+
+ /* Kill all the work that may have been queued by hpd. */
+ drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
+ for_each_intel_connector_iter(connector, &conn_iter) {
+ struct intel_panel *panel = &connector->panel;
+ const struct drm_connector_state *conn_state =
+ connector->base.state;
+
+ if (!panel->backlight.present)
+ continue;
+
+ if (panel->backlight.level && conn_state->crtc &&
+ conn_state->crtc->state->active) {
+ const struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(conn_state->crtc->state);
+
+ intel_panel_enable_backlight(crtc_state, conn_state);
+ } else {
+ WARN(panel->backlight.enabled, "Backlight enabled without crtc\n");
+
+ intel_panel_disable_backlight(conn_state);
+ }
+ }
+ drm_connector_list_iter_end(&conn_iter);
+}
+
int intel_panel_init(struct intel_panel *panel,
struct drm_display_mode *fixed_mode,
struct drm_display_mode *downclock_mode)
--
2.19.2
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