X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fsti%2Fsti_compositor.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fsti%2Fsti_compositor.c;h=43215d3020fb6e8060d2fd2fb48e0e50b3c28c47;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/gpu/drm/sti/sti_compositor.c b/kernel/drivers/gpu/drm/sti/sti_compositor.c new file mode 100644 index 000000000..43215d302 --- /dev/null +++ b/kernel/drivers/gpu/drm/sti/sti_compositor.c @@ -0,0 +1,284 @@ +/* + * Copyright (C) STMicroelectronics SA 2014 + * Authors: Benjamin Gaignard + * Fabien Dessenne + * for STMicroelectronics. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include +#include +#include +#include + +#include + +#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 = 8, + .subdev_desc = { + {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000}, + {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}, + {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00}, + }, +}; + +/* + * 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: + case STI_CURSOR_SUBDEV: + compo->layer[layer_id++] = + sti_layer_create(compo->dev, desc[i].id, + compo->regs + desc[i].offset); + break; + 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 (crtc < compo->nb_mixers) + plane_type = DRM_PLANE_TYPE_PRIMARY; + + switch (type) { + case STI_CUR: + cursor = sti_drm_plane_init(drm_dev, + compo->layer[i], + 1, DRM_PLANE_TYPE_CURSOR); + break; + case STI_GDP: + case STI_VID: + primary = sti_drm_plane_init(drm_dev, + compo->layer[i], + (1 << compo->nb_mixers) - 1, + plane_type); + plane++; + break; + case STI_BCK: + case STI_VDP: + break; + } + + /* The first planes are reserved for primary planes*/ + if (crtc < compo->nb_mixers && primary) { + sti_drm_crtc_init(drm_dev, compo->mixer[crtc], + primary, cursor); + crtc++; + cursor = NULL; + primary = 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", + .of_match_table = compositor_of_match, + }, + .probe = sti_compositor_probe, + .remove = sti_compositor_remove, +}; + +module_platform_driver(sti_compositor_driver); + +MODULE_AUTHOR("Benjamin Gaignard "); +MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); +MODULE_LICENSE("GPL");