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Message-Id: <20250917-mtk-post-blend-color-pipeline-v2-19-ac4471b44758@collabora.com>
Date: Wed, 17 Sep 2025 20:43:28 -0400
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Haneen Mohammed <hamohammed.sa@...il.com>,
Melissa Wen <melissa.srw@...il.com>
Cc: Alex Hung <alex.hung@....com>, wayland-devel@...ts.freedesktop.org,
harry.wentland@....com, leo.liu@....com, ville.syrjala@...ux.intel.com,
pekka.paalanen@...labora.com, contact@...rsion.fr, mwen@...lia.com,
jadahl@...hat.com, sebastian.wick@...hat.com, shashank.sharma@....com,
agoins@...dia.com, joshua@...ggi.es, mdaenzer@...hat.com, aleixpol@....org,
xaver.hugl@...il.com, victoria@...tem76.com, uma.shankar@...el.com,
quic_naseer@...cinc.com, quic_cbraga@...cinc.com, quic_abhinavk@...cinc.com,
marcan@...can.st, Liviu.Dudau@....com, sashamcintosh@...gle.com,
chaitanya.kumar.borah@...el.com, louis.chauvet@...tlin.com,
mcanal@...lia.com, kernel@...labora.com, daniels@...labora.com,
leandro.ribeiro@...labora.com, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
Nícolas F. R. A. Prado <nfraprado@...labora.com>,
Simona Vetter <simona.vetter@...ll.ch>
Subject: [PATCH RFC v2 19/20] drm/vkms: Introduce support for post-blend
color pipeline
Introduce a post-blend color pipeline with the same colorop blocks as
the pre-blend color pipeline.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
drivers/gpu/drm/vkms/vkms_colorop.c | 98 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/vkms/vkms_composer.c | 5 +-
drivers/gpu/drm/vkms/vkms_crtc.c | 1 +
drivers/gpu/drm/vkms/vkms_drv.h | 1 +
4 files changed, 104 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vkms/vkms_colorop.c b/drivers/gpu/drm/vkms/vkms_colorop.c
index 5924ae2bd40fc904048f99bc9b96308140709e25..54c512db68eef16435d5f79453784f7784d540fb 100644
--- a/drivers/gpu/drm/vkms/vkms_colorop.c
+++ b/drivers/gpu/drm/vkms/vkms_colorop.c
@@ -98,6 +98,86 @@ vkms_initialize_pre_blend_color_pipeline(struct drm_plane *plane,
return ret;
}
+static int
+vkms_initialize_post_blend_color_pipeline(struct drm_crtc *crtc,
+ struct drm_prop_enum_list *list)
+{
+ struct drm_colorop *ops[MAX_COLOR_PIPELINE_OPS];
+ struct drm_device *dev = crtc->dev;
+ int ret;
+ int i = 0;
+
+ memset(ops, 0, sizeof(ops));
+
+ /* 1st op: 1d curve */
+ ops[i] = kzalloc(sizeof(*ops[i]), GFP_KERNEL);
+ if (!ops[i]) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ ret = drm_crtc_colorop_curve_1d_init(dev, ops[i], crtc, supported_tfs,
+ DRM_COLOROP_FLAG_ALLOW_BYPASS);
+ if (ret)
+ goto cleanup;
+
+ list->type = ops[i]->base.id;
+ list->name = kasprintf(GFP_KERNEL, "Color Pipeline %d", ops[i]->base.id);
+
+ i++;
+
+ /* 2nd op: 3x4 matrix */
+ ops[i] = kzalloc(sizeof(*ops[i]), GFP_KERNEL);
+ if (!ops[i]) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ ret = drm_crtc_colorop_ctm_3x4_init(dev, ops[i], crtc, DRM_COLOROP_FLAG_ALLOW_BYPASS);
+ if (ret)
+ goto cleanup;
+
+ drm_colorop_set_next_property(ops[i - 1], ops[i]);
+
+ i++;
+
+ /* 3rd op: 3x4 matrix */
+ ops[i] = kzalloc(sizeof(*ops[i]), GFP_KERNEL);
+ if (!ops[i]) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ ret = drm_crtc_colorop_ctm_3x4_init(dev, ops[i], crtc, DRM_COLOROP_FLAG_ALLOW_BYPASS);
+ if (ret)
+ goto cleanup;
+
+ drm_colorop_set_next_property(ops[i - 1], ops[i]);
+
+ i++;
+
+ /* 4th op: 1d curve */
+ ops[i] = kzalloc(sizeof(*ops[i]), GFP_KERNEL);
+ if (!ops[i]) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ ret = drm_crtc_colorop_curve_1d_init(dev, ops[i], crtc, supported_tfs,
+ DRM_COLOROP_FLAG_ALLOW_BYPASS);
+ if (ret)
+ goto cleanup;
+
+ drm_colorop_set_next_property(ops[i - 1], ops[i]);
+
+ return 0;
+
+cleanup:
+ drm_colorop_pipeline_destroy(dev);
+
+ return ret;
+}
+
int vkms_initialize_pre_blend_colorops(struct drm_plane *plane)
{
struct drm_prop_enum_list pipeline;
@@ -115,3 +195,21 @@ int vkms_initialize_pre_blend_colorops(struct drm_plane *plane)
return 0;
}
+
+int vkms_initialize_post_blend_colorops(struct drm_crtc *crtc)
+{
+ struct drm_prop_enum_list pipeline;
+ int ret;
+
+ /* Add color pipeline */
+ ret = vkms_initialize_post_blend_color_pipeline(crtc, &pipeline);
+ if (ret)
+ return ret;
+
+ /* Create COLOR_PIPELINE property and attach */
+ ret = drm_crtc_create_color_pipeline_property(crtc, &pipeline, 1);
+ if (ret)
+ return ret;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index 05e1551d6330e4dc14563d3a399b3544d11c6576..efe09538768b01108a305f0ace765246220b487b 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -495,7 +495,10 @@ static void blend(struct vkms_writeback_job *wb,
blend_line(plane[i], y, crtc_x_limit, stage_buffer, output_buffer);
}
- apply_lut(crtc_state, output_buffer);
+ if (crtc_state->base.color_pipeline_enabled)
+ color_transform(crtc_state->base.color_pipeline, output_buffer);
+ else
+ apply_lut(crtc_state, output_buffer);
*crc32 = crc32_le(*crc32, (void *)output_buffer->pixels, row_size);
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index e60573e0f3e9510252e1f198b00e28bcc7987620..04737c1fb70e4f0aef480a180e57a76fbc279dfa 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -295,6 +295,7 @@ struct vkms_output *vkms_crtc_init(struct drm_device *dev, struct drm_plane *pri
}
drm_crtc_enable_color_mgmt(crtc, 0, false, VKMS_LUT_SIZE);
+ vkms_initialize_post_blend_colorops(crtc);
spin_lock_init(&vkms_out->lock);
spin_lock_init(&vkms_out->composer_lock);
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 37ee569474223b2cf01e3cc0e4f119777533ae23..a0308c2263d1858a72906853960ea7d1bbecd03e 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -306,5 +306,6 @@ int vkms_enable_writeback_connector(struct vkms_device *vkmsdev, struct vkms_out
/* Colorops */
int vkms_initialize_pre_blend_colorops(struct drm_plane *plane);
+int vkms_initialize_post_blend_colorops(struct drm_crtc *crtc);
#endif /* _VKMS_DRV_H_ */
--
2.50.1
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