1 files changed, 281 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_compositor.c b/drivers/gpu/drm/sti/sti_compositor.c
new file mode 100644
index 000000000000..390d93e9a06c
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_compositor.c
@@ -0,0 +1,281 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
+ *          Fabien Dessenne <fabien.dessenne@st.com>
+ *          for STMicroelectronics.
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <drm/drmP.h>
+
+#include "sti_compositor.h"
+#include "sti_drm_crtc.h"
+#include "sti_drm_drv.h"
+#include "sti_drm_plane.h"
+#include "sti_gdp.h"
+#include "sti_vtg.h"
+
+/*
+ * stiH407 compositor properties
+ */
+struct sti_compositor_data stih407_compositor_data = {
+	.nb_subdev = 6,
+	.subdev_desc = {
+			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
+			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
+			{STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
+			{STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
+			{STI_VID_SUBDEV, (int)STI_VID_0, 0x700},
+			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
+	},
+};
+
+/*
+ * stiH416 compositor properties
+ * Note:
+ * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
+ * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
+ * not fit for stiH416 if we want to enable the MIXER_AUX.
+ */
+struct sti_compositor_data stih416_compositor_data = {
+	.nb_subdev = 3,
+	.subdev_desc = {
+			{STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
+			{STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
+			{STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
+	},
+};
+
+static int sti_compositor_init_subdev(struct sti_compositor *compo,
+		struct sti_compositor_subdev_descriptor *desc,
+		unsigned int array_size)
+{
+	unsigned int i, mixer_id = 0, layer_id = 0;
+
+	for (i = 0; i < array_size; i++) {
+		switch (desc[i].type) {
+		case STI_MIXER_MAIN_SUBDEV:
+		case STI_MIXER_AUX_SUBDEV:
+			compo->mixer[mixer_id++] =
+			    sti_mixer_create(compo->dev, desc[i].id,
+					     compo->regs + desc[i].offset);
+			break;
+		case STI_GPD_SUBDEV:
+		case STI_VID_SUBDEV:
+			compo->layer[layer_id++] =
+			    sti_layer_create(compo->dev, desc[i].id,
+					     compo->regs + desc[i].offset);
+			break;
+			/* case STI_CURSOR_SUBDEV : TODO */
+		default:
+			DRM_ERROR("Unknow subdev compoment type\n");
+			return 1;
+		}
+
+	}
+	compo->nb_mixers = mixer_id;
+	compo->nb_layers = layer_id;
+
+	return 0;
+}
+
+static int sti_compositor_bind(struct device *dev, struct device *master,
+	void *data)
+{
+	struct sti_compositor *compo = dev_get_drvdata(dev);
+	struct drm_device *drm_dev = data;
+	unsigned int i, crtc = 0, plane = 0;
+	struct sti_drm_private *dev_priv = drm_dev->dev_private;
+	struct drm_plane *cursor = NULL;
+	struct drm_plane *primary = NULL;
+
+	dev_priv->compo = compo;
+
+	for (i = 0; i < compo->nb_layers; i++) {
+		if (compo->layer[i]) {
+			enum sti_layer_desc desc = compo->layer[i]->desc;
+			enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK;
+			enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
+
+			if (compo->mixer[crtc])
+				plane_type = DRM_PLANE_TYPE_PRIMARY;
+
+			switch (type) {
+			case STI_CUR:
+				cursor = sti_drm_plane_init(drm_dev,
+						compo->layer[i],
+						(1 << crtc) - 1,
+						DRM_PLANE_TYPE_CURSOR);
+				break;
+			case STI_GDP:
+			case STI_VID:
+				primary = sti_drm_plane_init(drm_dev,
+						compo->layer[i],
+						(1 << crtc) - 1, plane_type);
+				plane++;
+				break;
+			case STI_BCK:
+				break;
+			}
+
+			/* The first planes are reserved for primary planes*/
+			if (compo->mixer[crtc]) {
+				sti_drm_crtc_init(drm_dev, compo->mixer[crtc],
+						primary, cursor);
+				crtc++;
+				cursor = NULL;
+			}
+		}
+	}
+
+	drm_vblank_init(drm_dev, crtc);
+	/* Allow usage of vblank without having to call drm_irq_install */
+	drm_dev->irq_enabled = 1;
+
+	DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
+			 crtc, plane);
+	DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
+
+	return 0;
+}
+
+static void sti_compositor_unbind(struct device *dev, struct device *master,
+	void *data)
+{
+	/* do nothing */
+}
+
+static const struct component_ops sti_compositor_ops = {
+	.bind	= sti_compositor_bind,
+	.unbind	= sti_compositor_unbind,
+};
+
+static const struct of_device_id compositor_of_match[] = {
+	{
+		.compatible = "st,stih416-compositor",
+		.data = &stih416_compositor_data,
+	}, {
+		.compatible = "st,stih407-compositor",
+		.data = &stih407_compositor_data,
+	}, {
+		/* end node */
+	}
+};
+MODULE_DEVICE_TABLE(of, compositor_of_match);
+
+static int sti_compositor_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *vtg_np;
+	struct sti_compositor *compo;
+	struct resource *res;
+	int err;
+
+	compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
+	if (!compo) {
+		DRM_ERROR("Failed to allocate compositor context\n");
+		return -ENOMEM;
+	}
+	compo->dev = dev;
+	compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb;
+
+	/* populate data structure depending on compatibility */
+	BUG_ON(!of_match_node(compositor_of_match, np)->data);
+
+	memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
+	       sizeof(struct sti_compositor_data));
+
+	/* Get Memory ressources */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		DRM_ERROR("Get memory resource failed\n");
+		return -ENXIO;
+	}
+	compo->regs = devm_ioremap(dev, res->start, resource_size(res));
+	if (compo->regs == NULL) {
+		DRM_ERROR("Register mapping failed\n");
+		return -ENXIO;
+	}
+
+	/* Get clock resources */
+	compo->clk_compo_main = devm_clk_get(dev, "compo_main");
+	if (IS_ERR(compo->clk_compo_main)) {
+		DRM_ERROR("Cannot get compo_main clock\n");
+		return PTR_ERR(compo->clk_compo_main);
+	}
+
+	compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
+	if (IS_ERR(compo->clk_compo_aux)) {
+		DRM_ERROR("Cannot get compo_aux clock\n");
+		return PTR_ERR(compo->clk_compo_aux);
+	}
+
+	compo->clk_pix_main = devm_clk_get(dev, "pix_main");
+	if (IS_ERR(compo->clk_pix_main)) {
+		DRM_ERROR("Cannot get pix_main clock\n");
+		return PTR_ERR(compo->clk_pix_main);
+	}
+
+	compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
+	if (IS_ERR(compo->clk_pix_aux)) {
+		DRM_ERROR("Cannot get pix_aux clock\n");
+		return PTR_ERR(compo->clk_pix_aux);
+	}
+
+	/* Get reset resources */
+	compo->rst_main = devm_reset_control_get(dev, "compo-main");
+	/* Take compo main out of reset */
+	if (!IS_ERR(compo->rst_main))
+		reset_control_deassert(compo->rst_main);
+
+	compo->rst_aux = devm_reset_control_get(dev, "compo-aux");
+	/* Take compo aux out of reset */
+	if (!IS_ERR(compo->rst_aux))
+		reset_control_deassert(compo->rst_aux);
+
+	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
+	if (vtg_np)
+		compo->vtg_main = of_vtg_find(vtg_np);
+
+	vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
+	if (vtg_np)
+		compo->vtg_aux = of_vtg_find(vtg_np);
+
+	/* Initialize compositor subdevices */
+	err = sti_compositor_init_subdev(compo, compo->data.subdev_desc,
+					 compo->data.nb_subdev);
+	if (err)
+		return err;
+
+	platform_set_drvdata(pdev, compo);
+
+	return component_add(&pdev->dev, &sti_compositor_ops);
+}
+
+static int sti_compositor_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &sti_compositor_ops);
+	return 0;
+}
+
+static struct platform_driver sti_compositor_driver = {
+	.driver = {
+		.name = "sti-compositor",
+		.owner = THIS_MODULE,
+		.of_match_table = compositor_of_match,
+	},
+	.probe = sti_compositor_probe,
+	.remove = sti_compositor_remove,
+};
+
+module_platform_driver(sti_compositor_driver);
+
+MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
+MODULE_LICENSE("GPL");