[PATCH v4 4/4] drm/komeda: Adds gamma and color-transform support for DOU-IPS

[james qian wang (Arm Technology China)]

From: "Lowry Li (Arm Technology China)" <Lowry.Li at arm.com>

Adds gamma and color-transform support for DOU-IPS.
Adds two caps members fgamma_coeffs and ctm_coeffs to komeda_improc_state.
If color management changed, set gamma and color-transform accordingly.

Signed-off-by: Lowry Li (Arm Technology China) <lowry.li at arm.com>
---
 .../arm/display/komeda/d71/d71_component.c    | 24 +++++++++++++++++++
 .../gpu/drm/arm/display/komeda/komeda_crtc.c  |  2 ++
 .../drm/arm/display/komeda/komeda_pipeline.h  |  3 +++
 .../display/komeda/komeda_pipeline_state.c    |  6 +++++
 4 files changed, 35 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
index c3d29c0b051b..e7e5a8e4430e 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -942,15 +942,39 @@ static int d71_merger_init(struct d71_dev *d71,
 static void d71_improc_update(struct komeda_component *c,
 			      struct komeda_component_state *state)
 {
+	struct drm_crtc_state *crtc_st = state->crtc->state;
 	struct komeda_improc_state *st = to_improc_st(state);
+	struct d71_pipeline *pipe = to_d71_pipeline(c->pipeline);
 	u32 __iomem *reg = c->reg;
 	u32 index;
+	u32 mask = 0, ctrl = 0;
 
 	for_each_changed_input(state, index)
 		malidp_write32(reg, BLK_INPUT_ID0 + index * 4,
 			       to_d71_input_id(state, index));
 
 	malidp_write32(reg, BLK_SIZE, HV_SIZE(st->hsize, st->vsize));
+
+	if (crtc_st->color_mgmt_changed) {
+		mask |= IPS_CTRL_FT | IPS_CTRL_RGB;
+
+		if (crtc_st->gamma_lut) {
+			malidp_write_group(pipe->dou_ft_coeff_addr, FT_COEFF0,
+					   KOMEDA_N_GAMMA_COEFFS,
+					   st->fgamma_coeffs);
+			ctrl |= IPS_CTRL_FT; /* enable gamma */
+		}
+
+		if (crtc_st->ctm) {
+			malidp_write_group(reg, IPS_RGB_RGB_COEFF0,
+					   KOMEDA_N_CTM_COEFFS,
+					   st->ctm_coeffs);
+			ctrl |= IPS_CTRL_RGB; /* enable gamut */
+		}
+	}
+
+	if (mask)
+		malidp_write32_mask(reg, BLK_CONTROL, mask, ctrl);
 }
 
 static void d71_improc_dump(struct komeda_component *c, struct seq_file *sf)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 9beeda04818b..406b9d0ca058 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -590,6 +590,8 @@ static int komeda_crtc_add(struct komeda_kms_dev *kms,
 
 	crtc->port = kcrtc->master->of_output_port;
 
+	drm_crtc_enable_color_mgmt(crtc, 0, true, KOMEDA_COLOR_LUT_SIZE);
+
 	return err;
 }
 
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index b322f52ba8f2..c5ab8096c85d 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -11,6 +11,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include "malidp_utils.h"
+#include "komeda_color_mgmt.h"
 
 #define KOMEDA_MAX_PIPELINES		2
 #define KOMEDA_PIPELINE_MAX_LAYERS	4
@@ -324,6 +325,8 @@ struct komeda_improc {
 struct komeda_improc_state {
 	struct komeda_component_state base;
 	u16 hsize, vsize;
+	u32 fgamma_coeffs[KOMEDA_N_GAMMA_COEFFS];
+	u32 ctm_coeffs[KOMEDA_N_CTM_COEFFS];
 };
 
 /* display timing controller */
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
index 0ba9c6aa3708..4a40b37eb1a6 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -756,6 +756,12 @@ komeda_improc_validate(struct komeda_improc *improc,
 	st->hsize = dflow->in_w;
 	st->vsize = dflow->in_h;
 
+	if (kcrtc_st->base.color_mgmt_changed) {
+		drm_lut_to_fgamma_coeffs(kcrtc_st->base.gamma_lut,
+					 st->fgamma_coeffs);
+		drm_ctm_to_coeffs(kcrtc_st->base.ctm, st->ctm_coeffs);
+	}
+
 	komeda_component_add_input(&st->base, &dflow->input, 0);
 	komeda_component_set_output(&dflow->input, &improc->base, 0);
 
-- 
2.20.1