| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Benjamin Gaignard | 1041 | 62.41% | 6 | 35.29% |
| Vincent Abriou | 587 | 35.19% | 4 | 23.53% |
| Arvind Yadav | 11 | 0.66% | 1 | 5.88% |
| Thierry Reding | 11 | 0.66% | 1 | 5.88% |
| Sam Ravnborg | 7 | 0.42% | 1 | 5.88% |
| Bich Hemon | 6 | 0.36% | 2 | 11.76% |
| Arnd Bergmann | 4 | 0.24% | 1 | 5.88% |
| Christoph Hellwig | 1 | 0.06% | 1 | 5.88% |
| Total | 1668 | 17 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) STMicroelectronics SA 2014 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> * Fabien Dessenne <fabien.dessenne@st.com> * Vincent Abriou <vincent.abriou@st.com> * for STMicroelectronics. */ #include <linux/module.h> #include <linux/io.h> #include <linux/notifier.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <drm/drm_modes.h> #include <drm/drm_print.h> #include "sti_drv.h" #include "sti_vtg.h" #define VTG_MODE_MASTER 0 /* registers offset */ #define VTG_MODE 0x0000 #define VTG_CLKLN 0x0008 #define VTG_HLFLN 0x000C #define VTG_DRST_AUTOC 0x0010 #define VTG_VID_TFO 0x0040 #define VTG_VID_TFS 0x0044 #define VTG_VID_BFO 0x0048 #define VTG_VID_BFS 0x004C #define VTG_HOST_ITS 0x0078 #define VTG_HOST_ITS_BCLR 0x007C #define VTG_HOST_ITM_BCLR 0x0088 #define VTG_HOST_ITM_BSET 0x008C #define VTG_H_HD_1 0x00C0 #define VTG_TOP_V_VD_1 0x00C4 #define VTG_BOT_V_VD_1 0x00C8 #define VTG_TOP_V_HD_1 0x00CC #define VTG_BOT_V_HD_1 0x00D0 #define VTG_H_HD_2 0x00E0 #define VTG_TOP_V_VD_2 0x00E4 #define VTG_BOT_V_VD_2 0x00E8 #define VTG_TOP_V_HD_2 0x00EC #define VTG_BOT_V_HD_2 0x00F0 #define VTG_H_HD_3 0x0100 #define VTG_TOP_V_VD_3 0x0104 #define VTG_BOT_V_VD_3 0x0108 #define VTG_TOP_V_HD_3 0x010C #define VTG_BOT_V_HD_3 0x0110 #define VTG_H_HD_4 0x0120 #define VTG_TOP_V_VD_4 0x0124 #define VTG_BOT_V_VD_4 0x0128 #define VTG_TOP_V_HD_4 0x012c #define VTG_BOT_V_HD_4 0x0130 #define VTG_IRQ_BOTTOM BIT(0) #define VTG_IRQ_TOP BIT(1) #define VTG_IRQ_MASK (VTG_IRQ_TOP | VTG_IRQ_BOTTOM) /* Delay introduced by the HDMI in nb of pixel */ #define HDMI_DELAY (5) /* Delay introduced by the DVO in nb of pixel */ #define DVO_DELAY (7) /* delay introduced by the Arbitrary Waveform Generator in nb of pixels */ #define AWG_DELAY_HD (-9) #define AWG_DELAY_ED (-8) #define AWG_DELAY_SD (-7) /* * STI VTG register offset structure * *@h_hd: stores the VTG_H_HD_x register offset *@top_v_vd: stores the VTG_TOP_V_VD_x register offset *@bot_v_vd: stores the VTG_BOT_V_VD_x register offset *@top_v_hd: stores the VTG_TOP_V_HD_x register offset *@bot_v_hd: stores the VTG_BOT_V_HD_x register offset */ struct sti_vtg_regs_offs { u32 h_hd; u32 top_v_vd; u32 bot_v_vd; u32 top_v_hd; u32 bot_v_hd; }; #define VTG_MAX_SYNC_OUTPUT 4 static const struct sti_vtg_regs_offs vtg_regs_offs[VTG_MAX_SYNC_OUTPUT] = { { VTG_H_HD_1, VTG_TOP_V_VD_1, VTG_BOT_V_VD_1, VTG_TOP_V_HD_1, VTG_BOT_V_HD_1 }, { VTG_H_HD_2, VTG_TOP_V_VD_2, VTG_BOT_V_VD_2, VTG_TOP_V_HD_2, VTG_BOT_V_HD_2 }, { VTG_H_HD_3, VTG_TOP_V_VD_3, VTG_BOT_V_VD_3, VTG_TOP_V_HD_3, VTG_BOT_V_HD_3 }, { VTG_H_HD_4, VTG_TOP_V_VD_4, VTG_BOT_V_VD_4, VTG_TOP_V_HD_4, VTG_BOT_V_HD_4 } }; /* * STI VTG synchronisation parameters structure * *@hsync: sample number falling and rising edge *@vsync_line_top: vertical top field line number falling and rising edge *@vsync_line_bot: vertical bottom field line number falling and rising edge *@vsync_off_top: vertical top field sample number rising and falling edge *@vsync_off_bot: vertical bottom field sample number rising and falling edge */ struct sti_vtg_sync_params { u32 hsync; u32 vsync_line_top; u32 vsync_line_bot; u32 vsync_off_top; u32 vsync_off_bot; }; /* * STI VTG structure * * @regs: register mapping * @sync_params: synchronisation parameters used to generate timings * @irq: VTG irq * @irq_status: store the IRQ status value * @notifier_list: notifier callback * @crtc: the CRTC for vblank event */ struct sti_vtg { void __iomem *regs; struct sti_vtg_sync_params sync_params[VTG_MAX_SYNC_OUTPUT]; int irq; u32 irq_status; struct raw_notifier_head notifier_list; struct drm_crtc *crtc; }; struct sti_vtg *of_vtg_find(struct device_node *np) { struct platform_device *pdev; pdev = of_find_device_by_node(np); if (!pdev) return NULL; return (struct sti_vtg *)platform_get_drvdata(pdev); } static void vtg_reset(struct sti_vtg *vtg) { writel(1, vtg->regs + VTG_DRST_AUTOC); } static void vtg_set_output_window(void __iomem *regs, const struct drm_display_mode *mode) { u32 video_top_field_start; u32 video_top_field_stop; u32 video_bottom_field_start; u32 video_bottom_field_stop; u32 xstart = sti_vtg_get_pixel_number(*mode, 0); u32 ystart = sti_vtg_get_line_number(*mode, 0); u32 xstop = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); u32 ystop = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); /* Set output window to fit the display mode selected */ video_top_field_start = (ystart << 16) | xstart; video_top_field_stop = (ystop << 16) | xstop; /* Only progressive supported for now */ video_bottom_field_start = video_top_field_start; video_bottom_field_stop = video_top_field_stop; writel(video_top_field_start, regs + VTG_VID_TFO); writel(video_top_field_stop, regs + VTG_VID_TFS); writel(video_bottom_field_start, regs + VTG_VID_BFO); writel(video_bottom_field_stop, regs + VTG_VID_BFS); } static void vtg_set_hsync_vsync_pos(struct sti_vtg_sync_params *sync, int delay, const struct drm_display_mode *mode) { long clocksperline, start, stop; u32 risesync_top, fallsync_top; u32 risesync_offs_top, fallsync_offs_top; clocksperline = mode->htotal; /* Get the hsync position */ start = 0; stop = mode->hsync_end - mode->hsync_start; start += delay; stop += delay; if (start < 0) start += clocksperline; else if (start >= clocksperline) start -= clocksperline; if (stop < 0) stop += clocksperline; else if (stop >= clocksperline) stop -= clocksperline; sync->hsync = (stop << 16) | start; /* Get the vsync position */ if (delay >= 0) { risesync_top = 1; fallsync_top = risesync_top; fallsync_top += mode->vsync_end - mode->vsync_start; fallsync_offs_top = (u32)delay; risesync_offs_top = (u32)delay; } else { risesync_top = mode->vtotal; fallsync_top = mode->vsync_end - mode->vsync_start; fallsync_offs_top = clocksperline + delay; risesync_offs_top = clocksperline + delay; } sync->vsync_line_top = (fallsync_top << 16) | risesync_top; sync->vsync_off_top = (fallsync_offs_top << 16) | risesync_offs_top; /* Only progressive supported for now */ sync->vsync_line_bot = sync->vsync_line_top; sync->vsync_off_bot = sync->vsync_off_top; } static void vtg_set_mode(struct sti_vtg *vtg, int type, struct sti_vtg_sync_params *sync, const struct drm_display_mode *mode) { unsigned int i; /* Set the number of clock cycles per line */ writel(mode->htotal, vtg->regs + VTG_CLKLN); /* Set Half Line Per Field (only progressive supported for now) */ writel(mode->vtotal * 2, vtg->regs + VTG_HLFLN); /* Program output window */ vtg_set_output_window(vtg->regs, mode); /* Set hsync and vsync position for HDMI */ vtg_set_hsync_vsync_pos(&sync[VTG_SYNC_ID_HDMI - 1], HDMI_DELAY, mode); /* Set hsync and vsync position for HD DCS */ vtg_set_hsync_vsync_pos(&sync[VTG_SYNC_ID_HDDCS - 1], 0, mode); /* Set hsync and vsync position for HDF */ vtg_set_hsync_vsync_pos(&sync[VTG_SYNC_ID_HDF - 1], AWG_DELAY_HD, mode); /* Set hsync and vsync position for DVO */ vtg_set_hsync_vsync_pos(&sync[VTG_SYNC_ID_DVO - 1], DVO_DELAY, mode); /* Progam the syncs outputs */ for (i = 0; i < VTG_MAX_SYNC_OUTPUT ; i++) { writel(sync[i].hsync, vtg->regs + vtg_regs_offs[i].h_hd); writel(sync[i].vsync_line_top, vtg->regs + vtg_regs_offs[i].top_v_vd); writel(sync[i].vsync_line_bot, vtg->regs + vtg_regs_offs[i].bot_v_vd); writel(sync[i].vsync_off_top, vtg->regs + vtg_regs_offs[i].top_v_hd); writel(sync[i].vsync_off_bot, vtg->regs + vtg_regs_offs[i].bot_v_hd); } /* mode */ writel(type, vtg->regs + VTG_MODE); } static void vtg_enable_irq(struct sti_vtg *vtg) { /* clear interrupt status and mask */ writel(0xFFFF, vtg->regs + VTG_HOST_ITS_BCLR); writel(0xFFFF, vtg->regs + VTG_HOST_ITM_BCLR); writel(VTG_IRQ_MASK, vtg->regs + VTG_HOST_ITM_BSET); } void sti_vtg_set_config(struct sti_vtg *vtg, const struct drm_display_mode *mode) { /* write configuration */ vtg_set_mode(vtg, VTG_MODE_MASTER, vtg->sync_params, mode); vtg_reset(vtg); vtg_enable_irq(vtg); } /** * sti_vtg_get_line_number * * @mode: display mode to be used * @y: line * * Return the line number according to the display mode taking * into account the Sync and Back Porch information. * Video frame line numbers start at 1, y starts at 0. * In interlaced modes the start line is the field line number of the odd * field, but y is still defined as a progressive frame. */ u32 sti_vtg_get_line_number(struct drm_display_mode mode, int y) { u32 start_line = mode.vtotal - mode.vsync_start + 1; if (mode.flags & DRM_MODE_FLAG_INTERLACE) start_line *= 2; return start_line + y; } /** * sti_vtg_get_pixel_number * * @mode: display mode to be used * @x: row * * Return the pixel number according to the display mode taking * into account the Sync and Back Porch information. * Pixels are counted from 0. */ u32 sti_vtg_get_pixel_number(struct drm_display_mode mode, int x) { return mode.htotal - mode.hsync_start + x; } int sti_vtg_register_client(struct sti_vtg *vtg, struct notifier_block *nb, struct drm_crtc *crtc) { vtg->crtc = crtc; return raw_notifier_chain_register(&vtg->notifier_list, nb); } int sti_vtg_unregister_client(struct sti_vtg *vtg, struct notifier_block *nb) { return raw_notifier_chain_unregister(&vtg->notifier_list, nb); } static irqreturn_t vtg_irq_thread(int irq, void *arg) { struct sti_vtg *vtg = arg; u32 event; event = (vtg->irq_status & VTG_IRQ_TOP) ? VTG_TOP_FIELD_EVENT : VTG_BOTTOM_FIELD_EVENT; raw_notifier_call_chain(&vtg->notifier_list, event, vtg->crtc); return IRQ_HANDLED; } static irqreturn_t vtg_irq(int irq, void *arg) { struct sti_vtg *vtg = arg; vtg->irq_status = readl(vtg->regs + VTG_HOST_ITS); writel(vtg->irq_status, vtg->regs + VTG_HOST_ITS_BCLR); /* force sync bus write */ readl(vtg->regs + VTG_HOST_ITS); return IRQ_WAKE_THREAD; } static int vtg_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct sti_vtg *vtg; struct resource *res; int ret; vtg = devm_kzalloc(dev, sizeof(*vtg), GFP_KERNEL); if (!vtg) return -ENOMEM; /* Get Memory ressources */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { DRM_ERROR("Get memory resource failed\n"); return -ENOMEM; } vtg->regs = devm_ioremap(dev, res->start, resource_size(res)); if (!vtg->regs) { DRM_ERROR("failed to remap I/O memory\n"); return -ENOMEM; } vtg->irq = platform_get_irq(pdev, 0); if (vtg->irq < 0) { DRM_ERROR("Failed to get VTG interrupt\n"); return vtg->irq; } RAW_INIT_NOTIFIER_HEAD(&vtg->notifier_list); ret = devm_request_threaded_irq(dev, vtg->irq, vtg_irq, vtg_irq_thread, IRQF_ONESHOT, dev_name(dev), vtg); if (ret < 0) { DRM_ERROR("Failed to register VTG interrupt\n"); return ret; } platform_set_drvdata(pdev, vtg); DRM_INFO("%s %s\n", __func__, dev_name(dev)); return 0; } static const struct of_device_id vtg_of_match[] = { { .compatible = "st,vtg", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, vtg_of_match); struct platform_driver sti_vtg_driver = { .driver = { .name = "sti-vtg", .owner = THIS_MODULE, .of_match_table = vtg_of_match, }, .probe = vtg_probe, }; MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); MODULE_LICENSE("GPL");
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