For global histogram the panel should be edp and should have pwm based
backlight controller. Flags are updated accordingly.

Reviewed-by: Uma Shankar <[email protected]>
Signed-off-by: Arun R Murthy <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_modeset_setup.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c 
b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
index cd21b0ddbabb..975d6bdb59f3 100644
--- a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
+++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
@@ -17,12 +17,14 @@
 #include "intel_crtc_state_dump.h"
 #include "intel_ddi.h"
 #include "intel_de.h"
+#include "intel_dp.h"
 #include "intel_display.h"
 #include "intel_display_power.h"
 #include "intel_display_types.h"
 #include "intel_modeset_setup.h"
 #include "intel_pch_display.h"
 #include "intel_pm.h"
+#include "intel_global_hist.h"
 
 static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
                                        struct drm_modeset_acquire_ctx *ctx)
@@ -309,6 +311,7 @@ static void intel_sanitize_encoder(struct intel_encoder 
*encoder)
        struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
        struct intel_crtc_state *crtc_state = crtc ?
                to_intel_crtc_state(crtc->base.state) : NULL;
+       struct intel_panel *panel;
 
        /*
         * We need to check both for a crtc link (meaning that the encoder is
@@ -376,6 +379,15 @@ static void intel_sanitize_encoder(struct intel_encoder 
*encoder)
 
        if (HAS_DDI(i915))
                intel_ddi_sanitize_encoder_pll_mapping(encoder);
+
+       /* validate the global hist struct elements */
+       if (intel_dp_is_port_edp(i915, encoder->port)) {
+               crtc->global_hist->has_edp = true;
+               panel = &connector->panel;
+               if (panel->backlight.present == true)
+                       crtc->global_hist->has_pwm = true;
+       }
+
 }
 
 /* FIXME read out full plane state for all planes */
-- 
2.25.1

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