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authorRuud Derwig <rderwig@synopsys.com>2016-06-06 10:47:46 +0300
committerAlexey Brodkin <abrodkin@synopsys.com>2016-06-13 17:45:17 +0200
commita189d28e5edea70f20995547ddc84c79b2f76c03 (patch)
tree2cab6e30400c91cf771bbc0f4dc339c3d8bf74fd /drivers/gpu/drm/arc
parent3c85f20a289d044f303f473ee6ab7502303fc3b0 (diff)
drm/arcpgu: Make ARC PGU usable on simulation platforms
In case of simulation there's no real encoder/transmitter device because in the model's virtual LCD we're rendering whatever appears in frame-buffer memory. Signed-off-by: Ruud Derwig <rderwig@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/arc')
-rw-r--r--drivers/gpu/drm/arc/Makefile2
-rw-r--r--drivers/gpu/drm/arc/arcpgu.h1
-rw-r--r--drivers/gpu/drm/arc/arcpgu_drv.c15
-rw-r--r--drivers/gpu/drm/arc/arcpgu_sim.c128
4 files changed, 138 insertions, 8 deletions
diff --git a/drivers/gpu/drm/arc/Makefile b/drivers/gpu/drm/arc/Makefile
index d48fda70f857..73de56a0139a 100644
--- a/drivers/gpu/drm/arc/Makefile
+++ b/drivers/gpu/drm/arc/Makefile
@@ -1,2 +1,2 @@
-arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_drv.o
+arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_sim.o arcpgu_drv.o
obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o
diff --git a/drivers/gpu/drm/arc/arcpgu.h b/drivers/gpu/drm/arc/arcpgu.h
index 86574b698a78..329ac7570911 100644
--- a/drivers/gpu/drm/arc/arcpgu.h
+++ b/drivers/gpu/drm/arc/arcpgu.h
@@ -43,6 +43,7 @@ static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
int arc_pgu_setup_crtc(struct drm_device *dev);
int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np);
+int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np);
struct drm_fbdev_cma *arcpgu_fbdev_cma_init(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int num_crtc,
unsigned int max_conn_count);
diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
index 7675bbc70133..07c1bdeca489 100644
--- a/drivers/gpu/drm/arc/arcpgu_drv.c
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -149,15 +149,16 @@ static int arcpgu_load(struct drm_device *drm)
/* find the encoder node and initialize it */
encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
- if (!encoder_node) {
- dev_err(drm->dev, "failed to get an encoder slave node\n");
- return -ENODEV;
+ if (encoder_node) {
+ ret = arcpgu_drm_hdmi_init(drm, encoder_node);
+ if (ret < 0)
+ return ret;
+ } else {
+ ret = arcpgu_drm_sim_init(drm, 0);
+ if (ret < 0)
+ return ret;
}
- ret = arcpgu_drm_hdmi_init(drm, encoder_node);
- if (ret < 0)
- return ret;
-
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
diff --git a/drivers/gpu/drm/arc/arcpgu_sim.c b/drivers/gpu/drm/arc/arcpgu_sim.c
new file mode 100644
index 000000000000..2bf06d71556a
--- /dev/null
+++ b/drivers/gpu/drm/arc/arcpgu_sim.c
@@ -0,0 +1,128 @@
+/*
+ * ARC PGU DRM driver.
+ *
+ * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_atomic_helper.h>
+
+#include "arcpgu.h"
+
+#define XRES_DEF 640
+#define YRES_DEF 480
+
+#define XRES_MAX 8192
+#define YRES_MAX 8192
+
+
+struct arcpgu_drm_connector {
+ struct drm_connector connector;
+ struct drm_encoder_slave *encoder_slave;
+};
+
+static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
+{
+ int count;
+
+ count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
+ drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
+ return count;
+}
+
+static enum drm_connector_status
+arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
+{
+ return connector_status_connected;
+}
+
+static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_helper_funcs
+arcpgu_drm_connector_helper_funcs = {
+ .get_modes = arcpgu_drm_connector_get_modes,
+};
+
+static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
+ .dpms = drm_helper_connector_dpms,
+ .reset = drm_atomic_helper_connector_reset,
+ .detect = arcpgu_drm_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = arcpgu_drm_connector_destroy,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np)
+{
+ struct arcpgu_drm_connector *arcpgu_connector;
+ struct drm_encoder_slave *encoder;
+ struct drm_connector *connector;
+ int ret;
+
+ encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
+ if (encoder == NULL)
+ return -ENOMEM;
+
+ encoder->base.possible_crtcs = 1;
+ encoder->base.possible_clones = 0;
+
+ ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs,
+ DRM_MODE_ENCODER_VIRTUAL, NULL);
+ if (ret)
+ return ret;
+
+ arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector),
+ GFP_KERNEL);
+ if (!arcpgu_connector) {
+ ret = -ENOMEM;
+ goto error_encoder_cleanup;
+ }
+
+ connector = &arcpgu_connector->connector;
+ drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs);
+
+ ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs,
+ DRM_MODE_CONNECTOR_VIRTUAL);
+ if (ret < 0) {
+ dev_err(drm->dev, "failed to initialize drm connector\n");
+ goto error_encoder_cleanup;
+ }
+
+ ret = drm_mode_connector_attach_encoder(connector, &encoder->base);
+ if (ret < 0) {
+ dev_err(drm->dev, "could not attach connector to encoder\n");
+ drm_connector_unregister(connector);
+ goto error_connector_cleanup;
+ }
+
+ arcpgu_connector->encoder_slave = encoder;
+
+ return 0;
+
+error_connector_cleanup:
+ drm_connector_cleanup(connector);
+
+error_encoder_cleanup:
+ drm_encoder_cleanup(&encoder->base);
+ return ret;
+}