[PATCH 07/10] drm/i915/display: handle drm-crtc histogram property updates

[Arun R Murthy]

Check for any updates on drm_crtc property histogram_enable and
histogram_iet_updated and call/act accordingly to update histogram or
update the image enhancement LUT data API defined in i915 histogram.

Signed-off-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 drivers/gpu/drm/i915/display/intel_atomic.c   |  1 +
 drivers/gpu/drm/i915/display/intel_crtc.c     |  7 +++++++
 drivers/gpu/drm/i915/display/intel_display.c  | 17 ++++++++++++++++
 .../drm/i915/display/intel_display_types.h    |  2 ++
 .../gpu/drm/i915/display/intel_histogram.c    | 20 +++++++++++++++++++
 5 files changed, 47 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 03dc54c802d3..dff130b3565a 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -278,6 +278,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 	crtc_state->dsb_color_vblank = NULL;
 	crtc_state->dsb_commit = NULL;
 	crtc_state->use_dsb = false;
+	crtc_state->histogram_updated = false;
 
 	return &crtc_state->uapi;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
index a2c528d707f4..0c8741ca9a71 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -27,6 +27,7 @@
 #include "intel_drrs.h"
 #include "intel_dsi.h"
 #include "intel_fifo_underrun.h"
+#include "intel_histogram.h"
 #include "intel_pipe_crc.h"
 #include "intel_psr.h"
 #include "intel_sprite.h"
@@ -210,6 +211,7 @@ static struct intel_crtc *intel_crtc_alloc(void)
 static void intel_crtc_free(struct intel_crtc *crtc)
 {
 	intel_crtc_destroy_state(&crtc->base, crtc->base.state);
+	intel_histogram_finish(crtc);
 	kfree(crtc);
 }
 
@@ -380,10 +382,15 @@ int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 						BIT(DRM_SCALING_FILTER_DEFAULT) |
 						BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR));
 
+	if (drm_crtc_create_histogram_property(&crtc->base))
+		drm_err(&dev_priv->drm, "Failed to initialize histogram properties\n");
+
 	intel_color_crtc_init(crtc);
 	intel_drrs_crtc_init(crtc);
 	intel_crtc_crc_init(crtc);
 
+	intel_histogram_init(crtc);
+
 	cpu_latency_qos_add_request(&crtc->vblank_pm_qos, PM_QOS_DEFAULT_VALUE);
 
 	drm_WARN_ON(&dev_priv->drm, drm_crtc_index(&crtc->base) != crtc->pipe);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9db255bb1230..eeeb59fb39c0 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -93,6 +93,7 @@
 #include "intel_fifo_underrun.h"
 #include "intel_frontbuffer.h"
 #include "intel_hdmi.h"
+#include "intel_histogram.h"
 #include "intel_hotplug.h"
 #include "intel_link_bw.h"
 #include "intel_lvds.h"
@@ -4612,6 +4613,12 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
 	if (ret)
 		return ret;
 
+	if (crtc_state->histogram_updated) {
+		ret = intel_histogram_atomic_check(crtc);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
@@ -6831,6 +6838,10 @@ int intel_atomic_check(struct drm_device *dev,
 		if (new_crtc_state->uapi.scaling_filter !=
 		    old_crtc_state->uapi.scaling_filter)
 			new_crtc_state->uapi.mode_changed = true;
+
+		if (new_crtc_state->uapi.histogram_enable |=
+				old_crtc_state->uapi.histogram_enable)
+			new_crtc_state->histogram_updated = true;
 	}
 
 	intel_vrr_check_modeset(state);
@@ -7897,6 +7908,12 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 		 */
 		old_crtc_state->dsb_color_vblank = fetch_and_zero(&new_crtc_state->dsb_color_vblank);
 		old_crtc_state->dsb_commit = fetch_and_zero(&new_crtc_state->dsb_commit);
+
+		if (new_crtc_state->histogram_updated)
+			intel_histogram_update(crtc, crtc->base.state->histogram_enable);
+		if (new_crtc_state->uapi.histogram_iet_updated)
+			intel_histogram_set_iet_lut(crtc,
+						    new_crtc_state->uapi.histogram_iet);
 	}
 
 	/* Underruns don't always raise interrupts, so check manually */
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 351441efd10a..2e8640e84e7c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1306,6 +1306,8 @@ struct intel_crtc_state {
 
 	/* LOBF flag */
 	bool has_lobf;
+
+	bool histogram_updated;
 };
 
 enum intel_pipe_crc_source {
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index 57bb45b36a03..8f25cfe00ba5 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -68,6 +68,26 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
 		     DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
 	for (retry = 0; retry < HISTOGRAM_BIN_READ_RETRY_COUNT; retry++) {
 		if (intel_histogram_get_data(intel_crtc)) {
+			u32 *data;
+			u32 size;
+			struct drm_histogram *hist;
+
+			size = sizeof(u32) * sizeof(histogram->bin_data);
+			data = kzalloc(sizeof(data) * sizeof(histogram->bin_data), GFP_KERNEL);
+			if (!data)
+				return;
+			memcpy(histogram->bin_data, data, size);
+			hist = kzalloc(sizeof(struct drm_histogram), GFP_KERNEL);
+			if (!hist)
+				return;
+			hist->data_ptr = *data;
+			hist->nr_elements = sizeof(histogram->bin_data);
+
+			drm_property_replace_global_blob(display->drm,
+				&intel_crtc->base.state->histogram_data,
+				sizeof(struct drm_histogram),
+				hist, &intel_crtc->base.base,
+				intel_crtc->base.histogram_data_property);
 			/* Notify user for Histogram rediness */
 			if (kobject_uevent_env(&display->drm->primary->kdev->kobj,
 					       KOBJ_CHANGE, histogram_event))
-- 
2.25.1