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path: root/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
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Diffstat (limited to 'drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c')
-rw-r--r--drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
new file mode 100644
index 000000000..2c2b92324
--- /dev/null
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ */
+
+#include <linux/backlight.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "fsl_dcu_drm_drv.h"
+#include "fsl_tcon.h"
+
+int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
+ struct drm_crtc *crtc)
+{
+ struct drm_encoder *encoder = &fsl_dev->encoder;
+ int ret;
+
+ encoder->possible_crtcs = 1;
+
+ /* Use bypass mode for parallel RGB/LVDS encoder */
+ if (fsl_dev->tcon)
+ fsl_tcon_bypass_enable(fsl_dev->tcon);
+
+ ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
+ DRM_MODE_ENCODER_LVDS);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .destroy = fsl_dcu_drm_connector_destroy,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .reset = drm_atomic_helper_connector_reset,
+};
+
+static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
+{
+ struct fsl_dcu_drm_connector *fsl_connector;
+
+ fsl_connector = to_fsl_dcu_connector(connector);
+ return drm_panel_get_modes(fsl_connector->panel, connector);
+}
+
+static enum drm_mode_status
+fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ if (mode->hdisplay & 0xf)
+ return MODE_ERROR;
+
+ return MODE_OK;
+}
+
+static const struct drm_connector_helper_funcs connector_helper_funcs = {
+ .get_modes = fsl_dcu_drm_connector_get_modes,
+ .mode_valid = fsl_dcu_drm_connector_mode_valid,
+};
+
+static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
+ struct drm_panel *panel)
+{
+ struct drm_encoder *encoder = &fsl_dev->encoder;
+ struct drm_connector *connector = &fsl_dev->connector.base;
+ int ret;
+
+ fsl_dev->connector.encoder = encoder;
+
+ ret = drm_connector_init(fsl_dev->drm, connector,
+ &fsl_dcu_drm_connector_funcs,
+ DRM_MODE_CONNECTOR_LVDS);
+ if (ret < 0)
+ return ret;
+
+ drm_connector_helper_add(connector, &connector_helper_funcs);
+ ret = drm_connector_register(connector);
+ if (ret < 0)
+ goto err_cleanup;
+
+ ret = drm_connector_attach_encoder(connector, encoder);
+ if (ret < 0)
+ goto err_sysfs;
+
+ return 0;
+
+err_sysfs:
+ drm_connector_unregister(connector);
+err_cleanup:
+ drm_connector_cleanup(connector);
+ return ret;
+}
+
+int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
+{
+ struct device_node *panel_node;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ int ret;
+
+ /* This is for backward compatibility */
+ panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
+ if (panel_node) {
+ fsl_dev->connector.panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (IS_ERR(fsl_dev->connector.panel))
+ return PTR_ERR(fsl_dev->connector.panel);
+
+ return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
+ }
+
+ ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
+ if (ret)
+ return ret;
+
+ if (panel) {
+ fsl_dev->connector.panel = panel;
+ return fsl_dcu_attach_panel(fsl_dev, panel);
+ }
+
+ return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
+}