Introduce the dpu_writeback module which serves as the
interface between dpu operations and the drm_writeback.
This module manages the connector related operations for
dpu writeback.
Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 71 +++++++++++++++++++++++++++
drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h | 27 ++++++++++
3 files changed, 99 insertions(+)
create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 3abaf84..05a8515 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -74,6 +74,7 @@ msm-y := \
disp/dpu1/dpu_plane.o \
disp/dpu1/dpu_rm.o \
disp/dpu1/dpu_vbif.o \
+ disp/dpu1/dpu_writeback.o \
disp/msm_disp_snapshot.o \
disp/msm_disp_snapshot_util.o \
msm_atomic.o \
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
new file mode 100644
index 0000000..7b61fad
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include "dpu_writeback.h"
+
+static int dpu_wb_conn_get_modes(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+
+ return drm_add_modes_noedid(connector, dev->mode_config.max_width,
+ dev->mode_config.max_height);
+}
+
+static const struct drm_connector_funcs dpu_wb_conn_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int dpu_wb_conn_prepare_job(struct drm_writeback_connector *connector,
+ struct drm_writeback_job *job)
+{
+ if (!job->fb)
+ return 0;
+
+ dpu_encoder_prepare_wb_job(connector->encoder, job);
+
+ return 0;
+}
+
+static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector,
+ struct drm_writeback_job *job)
+{
+ if (!job->fb)
+ return;
+
+ dpu_encoder_cleanup_wb_job(connector->encoder, job);
+}
+
+static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = {
+ .get_modes = dpu_wb_conn_get_modes,
+ .prepare_writeback_job = dpu_wb_conn_prepare_job,
+ .cleanup_writeback_job = dpu_wb_conn_cleanup_job,
+};
+
+int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
+ const struct drm_encoder_helper_funcs *enc_helper_funcs, const u32 *format_list,
+ u32 num_formats)
+{
+ struct msm_drm_private *priv = dev->dev_private;
+ struct dpu_wb_connector *dpu_wb_conn;
+ int rc = 0;
+
+ dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL);
+ dpu_wb_conn->base.base = &dpu_wb_conn->connector;
+ dpu_wb_conn->base.encoder = enc;
+
+ drm_connector_helper_add(dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);
+
+ rc = drm_writeback_connector_init(dev, &dpu_wb_conn->base,
+ &dpu_wb_conn_funcs, enc_helper_funcs,
+ format_list, num_formats);
+
+ priv->connectors[priv->num_connectors++] = dpu_wb_conn->base.base;
+
+ return rc;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
new file mode 100644
index 0000000..206ce5e
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _DPU_WRITEBACK_H
+#define _DPU_WRITEBACK_H
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_file.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_writeback.h>
+
+#include "msm_drv.h"
+#include "dpu_kms.h"
+#include "dpu_encoder_phys.h"
+
+struct dpu_wb_connector {
+ struct drm_connector connector;
+ struct drm_writeback_connector base;
+};
+
+int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
+ const struct drm_encoder_helper_funcs *enc_helper_funcs,
+ const u32 *format_list, u32 num_formats);
+
+#endif /*_DPU_WRITEBACK_H */
--
2.7.4
