Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 249 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dpi.c b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
new file mode 100644
index 0000000000..378e538197
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Exynos DRM Parallel output support.
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * Contacts: Andrzej Hajda <a.hajda@samsung.com>
+*/
+
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#include "exynos_drm_crtc.h"
+
+struct exynos_dpi {
+	struct drm_encoder encoder;
+	struct device *dev;
+	struct device_node *panel_node;
+
+	struct drm_panel *panel;
+	struct drm_connector connector;
+
+	struct videomode *vm;
+};
+
+#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
+
+static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
+{
+	return container_of(e, struct exynos_dpi, encoder);
+}
+
+static enum drm_connector_status
+exynos_dpi_detect(struct drm_connector *connector, bool force)
+{
+	return connector_status_connected;
+}
+
+static void exynos_dpi_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
+	.detect = exynos_dpi_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = exynos_dpi_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int exynos_dpi_get_modes(struct drm_connector *connector)
+{
+	struct exynos_dpi *ctx = connector_to_dpi(connector);
+
+	/* fimd timings gets precedence over panel modes */
+	if (ctx->vm) {
+		struct drm_display_mode *mode;
+
+		mode = drm_mode_create(connector->dev);
+		if (!mode) {
+			DRM_DEV_ERROR(ctx->dev,
+				      "failed to create a new display mode\n");
+			return 0;
+		}
+		drm_display_mode_from_videomode(ctx->vm, mode);
+		mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+		drm_mode_probed_add(connector, mode);
+		return 1;
+	}
+
+	if (ctx->panel)
+		return drm_panel_get_modes(ctx->panel, connector);
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
+	.get_modes = exynos_dpi_get_modes,
+};
+
+static int exynos_dpi_create_connector(struct drm_encoder *encoder)
+{
+	struct exynos_dpi *ctx = encoder_to_dpi(encoder);
+	struct drm_connector *connector = &ctx->connector;
+	int ret;
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	ret = drm_connector_init(encoder->dev, connector,
+				 &exynos_dpi_connector_funcs,
+				 DRM_MODE_CONNECTOR_VGA);
+	if (ret) {
+		DRM_DEV_ERROR(ctx->dev,
+			      "failed to initialize connector with drm\n");
+		return ret;
+	}
+
+	drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
+	drm_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}
+
+static void exynos_dpi_mode_set(struct drm_encoder *encoder,
+				struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+}
+
+static void exynos_dpi_enable(struct drm_encoder *encoder)
+{
+	struct exynos_dpi *ctx = encoder_to_dpi(encoder);
+
+	if (ctx->panel) {
+		drm_panel_prepare(ctx->panel);
+		drm_panel_enable(ctx->panel);
+	}
+}
+
+static void exynos_dpi_disable(struct drm_encoder *encoder)
+{
+	struct exynos_dpi *ctx = encoder_to_dpi(encoder);
+
+	if (ctx->panel) {
+		drm_panel_disable(ctx->panel);
+		drm_panel_unprepare(ctx->panel);
+	}
+}
+
+static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
+	.mode_set = exynos_dpi_mode_set,
+	.enable = exynos_dpi_enable,
+	.disable = exynos_dpi_disable,
+};
+
+enum {
+	FIMD_PORT_IN0,
+	FIMD_PORT_IN1,
+	FIMD_PORT_IN2,
+	FIMD_PORT_RGB,
+	FIMD_PORT_WRB,
+};
+
+static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
+{
+	struct device *dev = ctx->dev;
+	struct device_node *dn = dev->of_node;
+	struct device_node *np;
+
+	ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0);
+
+	np = of_get_child_by_name(dn, "display-timings");
+	if (np) {
+		struct videomode *vm;
+		int ret;
+
+		of_node_put(np);
+
+		vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
+		if (!vm)
+			return -ENOMEM;
+
+		ret = of_get_videomode(dn, vm, 0);
+		if (ret < 0) {
+			devm_kfree(dev, vm);
+			return ret;
+		}
+
+		ctx->vm = vm;
+
+		return 0;
+	}
+
+	if (!ctx->panel_node)
+		return -EINVAL;
+
+	return 0;
+}
+
+int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
+{
+	int ret;
+
+	drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS);
+
+	drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
+
+	ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
+	if (ret < 0)
+		return ret;
+
+	ret = exynos_dpi_create_connector(encoder);
+	if (ret) {
+		DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev,
+			      "failed to create connector ret = %d\n", ret);
+		drm_encoder_cleanup(encoder);
+		return ret;
+	}
+
+	return 0;
+}
+
+struct drm_encoder *exynos_dpi_probe(struct device *dev)
+{
+	struct exynos_dpi *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
+
+	ctx->dev = dev;
+
+	ret = exynos_dpi_parse_dt(ctx);
+	if (ret < 0) {
+		devm_kfree(dev, ctx);
+		return NULL;
+	}
+
+	if (ctx->panel_node) {
+		ctx->panel = of_drm_find_panel(ctx->panel_node);
+		if (IS_ERR(ctx->panel))
+			return ERR_CAST(ctx->panel);
+	}
+
+	return &ctx->encoder;
+}
+
+int exynos_dpi_remove(struct drm_encoder *encoder)
+{
+	struct exynos_dpi *ctx = encoder_to_dpi(encoder);
+
+	exynos_dpi_disable(&ctx->encoder);
+
+	return 0;
+}