| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Eric Anholt | 1410 | 95.79% | 6 | 46.15% |
| Mario Kleiner | 29 | 1.97% | 1 | 7.69% |
| Benjamin Gaignard | 12 | 0.82% | 1 | 7.69% |
| Jose Abreu | 8 | 0.54% | 1 | 7.69% |
| Masahiro Yamada | 5 | 0.34% | 1 | 7.69% |
| Daniel Vetter | 4 | 0.27% | 1 | 7.69% |
| Rob Herring | 2 | 0.14% | 1 | 7.69% |
| Thomas Gleixner | 2 | 0.14% | 1 | 7.69% |
| Total | 1472 | 13 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2016 Broadcom Limited */ /** * DOC: VC4 DPI module * * The VC4 DPI hardware supports MIPI DPI type 4 and Nokia ViSSI * signals. On BCM2835, these can be routed out to GPIO0-27 with the * ALT2 function. */ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_edid.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_probe_helper.h> #include <linux/clk.h> #include <linux/component.h> #include <linux/of_graph.h> #include <linux/of_platform.h> #include "vc4_drv.h" #include "vc4_regs.h" #define DPI_C 0x00 # define DPI_OUTPUT_ENABLE_MODE BIT(16) /* The order field takes the incoming 24 bit RGB from the pixel valve * and shuffles the 3 channels. */ # define DPI_ORDER_MASK VC4_MASK(15, 14) # define DPI_ORDER_SHIFT 14 # define DPI_ORDER_RGB 0 # define DPI_ORDER_BGR 1 # define DPI_ORDER_GRB 2 # define DPI_ORDER_BRG 3 /* The format field takes the ORDER-shuffled pixel valve data and * formats it onto the output lines. */ # define DPI_FORMAT_MASK VC4_MASK(13, 11) # define DPI_FORMAT_SHIFT 11 /* This define is named in the hardware, but actually just outputs 0. */ # define DPI_FORMAT_9BIT_666_RGB 0 /* Outputs 00000000rrrrrggggggbbbbb */ # define DPI_FORMAT_16BIT_565_RGB_1 1 /* Outputs 000rrrrr00gggggg000bbbbb */ # define DPI_FORMAT_16BIT_565_RGB_2 2 /* Outputs 00rrrrr000gggggg00bbbbb0 */ # define DPI_FORMAT_16BIT_565_RGB_3 3 /* Outputs 000000rrrrrrggggggbbbbbb */ # define DPI_FORMAT_18BIT_666_RGB_1 4 /* Outputs 00rrrrrr00gggggg00bbbbbb */ # define DPI_FORMAT_18BIT_666_RGB_2 5 /* Outputs rrrrrrrrggggggggbbbbbbbb */ # define DPI_FORMAT_24BIT_888_RGB 6 /* Reverses the polarity of the corresponding signal */ # define DPI_PIXEL_CLK_INVERT BIT(10) # define DPI_HSYNC_INVERT BIT(9) # define DPI_VSYNC_INVERT BIT(8) # define DPI_OUTPUT_ENABLE_INVERT BIT(7) /* Outputs the signal the falling clock edge instead of rising. */ # define DPI_HSYNC_NEGATE BIT(6) # define DPI_VSYNC_NEGATE BIT(5) # define DPI_OUTPUT_ENABLE_NEGATE BIT(4) /* Disables the signal */ # define DPI_HSYNC_DISABLE BIT(3) # define DPI_VSYNC_DISABLE BIT(2) # define DPI_OUTPUT_ENABLE_DISABLE BIT(1) /* Power gate to the device, full reset at 0 -> 1 transition */ # define DPI_ENABLE BIT(0) /* All other registers besides DPI_C return the ID */ #define DPI_ID 0x04 # define DPI_ID_VALUE 0x00647069 /* General DPI hardware state. */ struct vc4_dpi { struct platform_device *pdev; struct drm_encoder *encoder; void __iomem *regs; struct clk *pixel_clock; struct clk *core_clock; struct debugfs_regset32 regset; }; #define DPI_READ(offset) readl(dpi->regs + (offset)) #define DPI_WRITE(offset, val) writel(val, dpi->regs + (offset)) /* VC4 DPI encoder KMS struct */ struct vc4_dpi_encoder { struct vc4_encoder base; struct vc4_dpi *dpi; }; static inline struct vc4_dpi_encoder * to_vc4_dpi_encoder(struct drm_encoder *encoder) { return container_of(encoder, struct vc4_dpi_encoder, base.base); } static const struct debugfs_reg32 dpi_regs[] = { VC4_REG32(DPI_C), VC4_REG32(DPI_ID), }; static const struct drm_encoder_funcs vc4_dpi_encoder_funcs = { .destroy = drm_encoder_cleanup, }; static void vc4_dpi_encoder_disable(struct drm_encoder *encoder) { struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder); struct vc4_dpi *dpi = vc4_encoder->dpi; clk_disable_unprepare(dpi->pixel_clock); } static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) { struct drm_device *dev = encoder->dev; struct drm_display_mode *mode = &encoder->crtc->mode; struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder); struct vc4_dpi *dpi = vc4_encoder->dpi; struct drm_connector_list_iter conn_iter; struct drm_connector *connector = NULL, *connector_scan; u32 dpi_c = DPI_ENABLE | DPI_OUTPUT_ENABLE_MODE; int ret; /* Look up the connector attached to DPI so we can get the * bus_format. Ideally the bridge would tell us the * bus_format we want, but it doesn't yet, so assume that it's * uniform throughout the bridge chain. */ drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector_scan, &conn_iter) { if (connector_scan->encoder == encoder) { connector = connector_scan; break; } } drm_connector_list_iter_end(&conn_iter); if (connector && connector->display_info.num_bus_formats) { u32 bus_format = connector->display_info.bus_formats[0]; switch (bus_format) { case MEDIA_BUS_FMT_RGB888_1X24: dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB, DPI_FORMAT); break; case MEDIA_BUS_FMT_BGR888_1X24: dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB, DPI_FORMAT); dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER); break; case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2, DPI_FORMAT); break; case MEDIA_BUS_FMT_RGB666_1X18: dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1, DPI_FORMAT); break; case MEDIA_BUS_FMT_RGB565_1X16: dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3, DPI_FORMAT); break; default: DRM_ERROR("Unknown media bus format %d\n", bus_format); break; } } else { /* Default to 24bit if no connector found. */ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB, DPI_FORMAT); } if (mode->flags & DRM_MODE_FLAG_NHSYNC) dpi_c |= DPI_HSYNC_INVERT; else if (!(mode->flags & DRM_MODE_FLAG_PHSYNC)) dpi_c |= DPI_HSYNC_DISABLE; if (mode->flags & DRM_MODE_FLAG_NVSYNC) dpi_c |= DPI_VSYNC_INVERT; else if (!(mode->flags & DRM_MODE_FLAG_PVSYNC)) dpi_c |= DPI_VSYNC_DISABLE; DPI_WRITE(DPI_C, dpi_c); ret = clk_set_rate(dpi->pixel_clock, mode->clock * 1000); if (ret) DRM_ERROR("Failed to set clock rate: %d\n", ret); ret = clk_prepare_enable(dpi->pixel_clock); if (ret) DRM_ERROR("Failed to set clock rate: %d\n", ret); } static enum drm_mode_status vc4_dpi_encoder_mode_valid(struct drm_encoder *encoder, const struct drm_display_mode *mode) { if (mode->flags & DRM_MODE_FLAG_INTERLACE) return MODE_NO_INTERLACE; return MODE_OK; } static const struct drm_encoder_helper_funcs vc4_dpi_encoder_helper_funcs = { .disable = vc4_dpi_encoder_disable, .enable = vc4_dpi_encoder_enable, .mode_valid = vc4_dpi_encoder_mode_valid, }; static const struct of_device_id vc4_dpi_dt_match[] = { { .compatible = "brcm,bcm2835-dpi", .data = NULL }, {} }; /* Sets up the next link in the display chain, whether it's a panel or * a bridge. */ static int vc4_dpi_init_bridge(struct vc4_dpi *dpi) { struct device *dev = &dpi->pdev->dev; struct drm_panel *panel; struct drm_bridge *bridge; int ret; ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge); if (ret) { /* If nothing was connected in the DT, that's not an * error. */ if (ret == -ENODEV) return 0; else return ret; } if (panel) bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DPI); return drm_bridge_attach(dpi->encoder, bridge, NULL); } static int vc4_dpi_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_dpi *dpi; struct vc4_dpi_encoder *vc4_dpi_encoder; int ret; dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL); if (!dpi) return -ENOMEM; vc4_dpi_encoder = devm_kzalloc(dev, sizeof(*vc4_dpi_encoder), GFP_KERNEL); if (!vc4_dpi_encoder) return -ENOMEM; vc4_dpi_encoder->base.type = VC4_ENCODER_TYPE_DPI; vc4_dpi_encoder->dpi = dpi; dpi->encoder = &vc4_dpi_encoder->base.base; dpi->pdev = pdev; dpi->regs = vc4_ioremap_regs(pdev, 0); if (IS_ERR(dpi->regs)) return PTR_ERR(dpi->regs); dpi->regset.base = dpi->regs; dpi->regset.regs = dpi_regs; dpi->regset.nregs = ARRAY_SIZE(dpi_regs); if (DPI_READ(DPI_ID) != DPI_ID_VALUE) { dev_err(dev, "Port returned 0x%08x for ID instead of 0x%08x\n", DPI_READ(DPI_ID), DPI_ID_VALUE); return -ENODEV; } dpi->core_clock = devm_clk_get(dev, "core"); if (IS_ERR(dpi->core_clock)) { ret = PTR_ERR(dpi->core_clock); if (ret != -EPROBE_DEFER) DRM_ERROR("Failed to get core clock: %d\n", ret); return ret; } dpi->pixel_clock = devm_clk_get(dev, "pixel"); if (IS_ERR(dpi->pixel_clock)) { ret = PTR_ERR(dpi->pixel_clock); if (ret != -EPROBE_DEFER) DRM_ERROR("Failed to get pixel clock: %d\n", ret); return ret; } ret = clk_prepare_enable(dpi->core_clock); if (ret) DRM_ERROR("Failed to turn on core clock: %d\n", ret); drm_encoder_init(drm, dpi->encoder, &vc4_dpi_encoder_funcs, DRM_MODE_ENCODER_DPI, NULL); drm_encoder_helper_add(dpi->encoder, &vc4_dpi_encoder_helper_funcs); ret = vc4_dpi_init_bridge(dpi); if (ret) goto err_destroy_encoder; dev_set_drvdata(dev, dpi); vc4->dpi = dpi; vc4_debugfs_add_regset32(drm, "dpi_regs", &dpi->regset); return 0; err_destroy_encoder: drm_encoder_cleanup(dpi->encoder); clk_disable_unprepare(dpi->core_clock); return ret; } static void vc4_dpi_unbind(struct device *dev, struct device *master, void *data) { struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_dpi *dpi = dev_get_drvdata(dev); drm_of_panel_bridge_remove(dev->of_node, 0, 0); drm_encoder_cleanup(dpi->encoder); clk_disable_unprepare(dpi->core_clock); vc4->dpi = NULL; } static const struct component_ops vc4_dpi_ops = { .bind = vc4_dpi_bind, .unbind = vc4_dpi_unbind, }; static int vc4_dpi_dev_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &vc4_dpi_ops); } static int vc4_dpi_dev_remove(struct platform_device *pdev) { component_del(&pdev->dev, &vc4_dpi_ops); return 0; } struct platform_driver vc4_dpi_driver = { .probe = vc4_dpi_dev_probe, .remove = vc4_dpi_dev_remove, .driver = { .name = "vc4_dpi", .of_match_table = vc4_dpi_dt_match, }, };
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