Lines Matching +full:dual +full:- +full:link
1 // SPDX-License-Identifier: GPL-2.0
3 * rcar_lvds.c -- R-Car LVDS Encoder
5 * Copyright (C) 2013-2018 Renesas Electronics Corporation
51 #define RCAR_LVDS_QUIRK_DUAL_LINK BIT(4) /* Supports dual-link operation */
84 iowrite32(data, lvds->mmio + reg); in rcar_lvds_write()
87 /* -----------------------------------------------------------------------------
148 * The LVDS PLL is made of a pre-divider and a multiplier (strangely in rcar_lvds_d3_e3_pll_calc()
149 * enough called M and N respectively), followed by a post-divider E. in rcar_lvds_d3_e3_pll_calc()
151 * ,-----. ,-----. ,-----. ,-----. in rcar_lvds_d3_e3_pll_calc()
152 * Fin --> | 1/M | -Fpdf-> | PFD | --> | VCO | -Fvco-> | 1/E | --> Fout in rcar_lvds_d3_e3_pll_calc()
153 * `-----' ,-> | | `-----' | `-----' in rcar_lvds_d3_e3_pll_calc()
154 * | `-----' | in rcar_lvds_d3_e3_pll_calc()
155 * | ,-----. | in rcar_lvds_d3_e3_pll_calc()
156 * `-------- | 1/N | <-------' in rcar_lvds_d3_e3_pll_calc()
157 * `-----' in rcar_lvds_d3_e3_pll_calc()
164 * ,-------. ,-----. |\ in rcar_lvds_d3_e3_pll_calc()
165 * Fout --> | 1/DIV | --> | 1/7 | --> | | in rcar_lvds_d3_e3_pll_calc()
166 * `-------' | `-----' | | --> dot clock in rcar_lvds_d3_e3_pll_calc()
167 * `------------> | | in rcar_lvds_d3_e3_pll_calc()
183 * allowed values for the pre-divider M (normal range 1-8). in rcar_lvds_d3_e3_pll_calc()
199 * 60-120). in rcar_lvds_d3_e3_pll_calc()
215 * post-divider E (normal value 1, 2 or 4). in rcar_lvds_d3_e3_pll_calc()
234 diff = abs(fout / div - target); in rcar_lvds_d3_e3_pll_calc()
236 if (diff < pll->diff) { in rcar_lvds_d3_e3_pll_calc()
237 pll->diff = diff; in rcar_lvds_d3_e3_pll_calc()
238 pll->pll_m = m; in rcar_lvds_d3_e3_pll_calc()
239 pll->pll_n = n; in rcar_lvds_d3_e3_pll_calc()
240 pll->pll_e = e; in rcar_lvds_d3_e3_pll_calc()
241 pll->div = div; in rcar_lvds_d3_e3_pll_calc()
242 pll->clksel = clksel; in rcar_lvds_d3_e3_pll_calc()
252 output = fin * pll->pll_n / pll->pll_m / (1 << pll->pll_e) in rcar_lvds_d3_e3_pll_calc()
253 / div7 / pll->div; in rcar_lvds_d3_e3_pll_calc()
254 error = (long)(output - target) * 10000 / (long)target; in rcar_lvds_d3_e3_pll_calc()
256 dev_dbg(lvds->dev, in rcar_lvds_d3_e3_pll_calc()
257 "%pC %lu Hz -> Fout %lu Hz (target %lu Hz, error %d.%02u%%), PLL M/N/E/DIV %u/%u/%u/%u\n", in rcar_lvds_d3_e3_pll_calc()
259 error < 0 ? -error % 100 : error % 100, in rcar_lvds_d3_e3_pll_calc()
260 pll->pll_m, pll->pll_n, pll->pll_e, pll->div); in rcar_lvds_d3_e3_pll_calc()
266 struct pll_info pll = { .diff = (unsigned long)-1 }; in __rcar_lvds_pll_setup_d3_e3()
269 rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[0], freq, &pll, in __rcar_lvds_pll_setup_d3_e3()
271 rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[1], freq, &pll, in __rcar_lvds_pll_setup_d3_e3()
273 rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.extal, freq, &pll, in __rcar_lvds_pll_setup_d3_e3()
277 | LVDPLLCR_PLLN(pll.pll_n - 1) | LVDPLLCR_PLLM(pll.pll_m - 1); in __rcar_lvds_pll_setup_d3_e3()
281 | LVDPLLCR_PLLE(pll.pll_e - 1); in __rcar_lvds_pll_setup_d3_e3()
294 LVDDIV_DIVRESET | LVDDIV_DIV(pll.div - 1)); in __rcar_lvds_pll_setup_d3_e3()
304 /* -----------------------------------------------------------------------------
305 * Clock - D3/E3 only
313 if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL))) in rcar_lvds_clk_enable()
314 return -ENODEV; in rcar_lvds_clk_enable()
316 dev_dbg(lvds->dev, "enabling LVDS PLL, freq=%luHz\n", freq); in rcar_lvds_clk_enable()
318 ret = clk_prepare_enable(lvds->clocks.mod); in rcar_lvds_clk_enable()
332 if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL))) in rcar_lvds_clk_disable()
335 dev_dbg(lvds->dev, "disabling LVDS PLL\n"); in rcar_lvds_clk_disable()
339 clk_disable_unprepare(lvds->clocks.mod); in rcar_lvds_clk_disable()
343 /* -----------------------------------------------------------------------------
357 if (!lvds->panel) in rcar_lvds_get_lvds_mode()
360 info = &connector->display_info; in rcar_lvds_get_lvds_mode()
361 if (!info->num_bus_formats || !info->bus_formats) { in rcar_lvds_get_lvds_mode()
362 dev_warn(lvds->dev, in rcar_lvds_get_lvds_mode()
367 switch (info->bus_formats[0]) { in rcar_lvds_get_lvds_mode()
376 dev_warn(lvds->dev, in rcar_lvds_get_lvds_mode()
378 info->bus_formats[0]); in rcar_lvds_get_lvds_mode()
382 if (info->bus_flags & DRM_BUS_FLAG_DATA_LSB_TO_MSB) in rcar_lvds_get_lvds_mode()
398 ret = clk_prepare_enable(lvds->clocks.mod); in __rcar_lvds_atomic_enable()
402 /* Enable the companion LVDS encoder in dual-link mode. */ in __rcar_lvds_atomic_enable()
403 if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion) in __rcar_lvds_atomic_enable()
404 __rcar_lvds_atomic_enable(lvds->companion, state, crtc, in __rcar_lvds_atomic_enable()
410 * HSYNC -> CTRL0 in __rcar_lvds_atomic_enable()
411 * VSYNC -> CTRL1 in __rcar_lvds_atomic_enable()
412 * DISP -> CTRL2 in __rcar_lvds_atomic_enable()
413 * 0 -> CTRL3 in __rcar_lvds_atomic_enable()
419 if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES) in __rcar_lvds_atomic_enable()
428 if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) { in __rcar_lvds_atomic_enable()
431 if (lvds->link_type != RCAR_LVDS_SINGLE_LINK) { in __rcar_lvds_atomic_enable()
439 bool swap_pixels = lvds->link_type == in __rcar_lvds_atomic_enable()
444 * an LVDS dual-link connection. in __rcar_lvds_atomic_enable()
450 | (lvds->companion && swap_pixels ? in __rcar_lvds_atomic_enable()
458 * dual-link mode. in __rcar_lvds_atomic_enable()
460 if (lvds->link_type == RCAR_LVDS_SINGLE_LINK || lvds->companion) { in __rcar_lvds_atomic_enable()
464 &crtc_state->adjusted_mode; in __rcar_lvds_atomic_enable()
466 lvds->info->pll_setup(lvds, mode->clock * 1000); in __rcar_lvds_atomic_enable()
472 if (lvds->bridge.encoder) { in __rcar_lvds_atomic_enable()
484 if (lvds->info->gen < 3) { in __rcar_lvds_atomic_enable()
490 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) { in __rcar_lvds_atomic_enable()
499 if (lvds->info->quirks & RCAR_LVDS_QUIRK_PWD) { in __rcar_lvds_atomic_enable()
505 if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) { in __rcar_lvds_atomic_enable()
511 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_PWD)) in __rcar_lvds_atomic_enable()
515 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) { in __rcar_lvds_atomic_enable()
528 struct drm_atomic_state *state = old_bridge_state->base.state; in rcar_lvds_atomic_enable()
533 bridge->encoder); in rcar_lvds_atomic_enable()
534 crtc = drm_atomic_get_new_connector_state(state, connector)->crtc; in rcar_lvds_atomic_enable()
548 /* Disable the companion LVDS encoder in dual-link mode. */ in rcar_lvds_atomic_disable()
549 if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion) in rcar_lvds_atomic_disable()
550 lvds->companion->funcs->atomic_disable(lvds->companion, in rcar_lvds_atomic_disable()
553 clk_disable_unprepare(lvds->clocks.mod); in rcar_lvds_atomic_disable()
568 min_freq = lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL ? 5000 : 31000; in rcar_lvds_mode_fixup()
569 adjusted_mode->clock = clamp(adjusted_mode->clock, min_freq, 148500); in rcar_lvds_mode_fixup()
579 if (!lvds->next_bridge) in rcar_lvds_attach()
582 return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge, in rcar_lvds_attach()
600 return lvds->link_type != RCAR_LVDS_SINGLE_LINK; in rcar_lvds_dual_link()
608 return lvds->next_bridge != NULL; in rcar_lvds_is_connected()
612 /* -----------------------------------------------------------------------------
622 struct device *dev = lvds->dev; in rcar_lvds_parse_dt_companion()
626 /* Locate the companion LVDS encoder for dual-link operation, if any. */ in rcar_lvds_parse_dt_companion()
627 companion = of_parse_phandle(dev->of_node, "renesas,companion", 0); in rcar_lvds_parse_dt_companion()
635 match = of_match_device(dev->driver->of_match_table, dev); in rcar_lvds_parse_dt_companion()
636 if (!of_device_is_compatible(companion, match->compatible)) { in rcar_lvds_parse_dt_companion()
638 ret = -ENXIO; in rcar_lvds_parse_dt_companion()
644 * dual-link mode. We do this by looking at the DT port nodes we are in rcar_lvds_parse_dt_companion()
648 port0 = of_graph_get_port_by_id(dev->of_node, 1); in rcar_lvds_parse_dt_companion()
656 lvds->link_type = RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; in rcar_lvds_parse_dt_companion()
659 lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS; in rcar_lvds_parse_dt_companion()
663 * Early dual-link bridge specific implementations populate the in rcar_lvds_parse_dt_companion()
668 if (lvds->next_bridge->timings && in rcar_lvds_parse_dt_companion()
669 lvds->next_bridge->timings->dual_link) in rcar_lvds_parse_dt_companion()
670 lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS; in rcar_lvds_parse_dt_companion()
672 lvds->link_type = RCAR_LVDS_SINGLE_LINK; in rcar_lvds_parse_dt_companion()
675 if (lvds->link_type == RCAR_LVDS_SINGLE_LINK) { in rcar_lvds_parse_dt_companion()
676 dev_dbg(dev, "Single-link configuration detected\n"); in rcar_lvds_parse_dt_companion()
680 lvds->companion = of_drm_find_bridge(companion); in rcar_lvds_parse_dt_companion()
681 if (!lvds->companion) { in rcar_lvds_parse_dt_companion()
682 ret = -EPROBE_DEFER; in rcar_lvds_parse_dt_companion()
687 "Dual-link configuration detected (companion encoder %pOF)\n", in rcar_lvds_parse_dt_companion()
690 if (lvds->link_type == RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS) in rcar_lvds_parse_dt_companion()
702 companion_lvds = bridge_to_rcar_lvds(lvds->companion); in rcar_lvds_parse_dt_companion()
703 companion_lvds->link_type = lvds->link_type; in rcar_lvds_parse_dt_companion()
715 ret = drm_of_find_panel_or_bridge(lvds->dev->of_node, 1, 0, in rcar_lvds_parse_dt()
716 &lvds->panel, &lvds->next_bridge); in rcar_lvds_parse_dt()
720 if (lvds->panel) { in rcar_lvds_parse_dt()
721 lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev, in rcar_lvds_parse_dt()
722 lvds->panel); in rcar_lvds_parse_dt()
723 if (IS_ERR_OR_NULL(lvds->next_bridge)) { in rcar_lvds_parse_dt()
724 ret = -EINVAL; in rcar_lvds_parse_dt()
729 if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) in rcar_lvds_parse_dt()
739 if (lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL) in rcar_lvds_parse_dt()
740 return ret == -ENODEV ? 0 : ret; in rcar_lvds_parse_dt()
750 clk = devm_clk_get(lvds->dev, name); in rcar_lvds_get_clock()
754 if (PTR_ERR(clk) == -ENOENT && optional) in rcar_lvds_get_clock()
757 dev_err_probe(lvds->dev, PTR_ERR(clk), "failed to get %s clock\n", in rcar_lvds_get_clock()
765 lvds->clocks.mod = rcar_lvds_get_clock(lvds, NULL, false); in rcar_lvds_get_clocks()
766 if (IS_ERR(lvds->clocks.mod)) in rcar_lvds_get_clocks()
767 return PTR_ERR(lvds->clocks.mod); in rcar_lvds_get_clocks()
772 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) in rcar_lvds_get_clocks()
775 lvds->clocks.extal = rcar_lvds_get_clock(lvds, "extal", true); in rcar_lvds_get_clocks()
776 if (IS_ERR(lvds->clocks.extal)) in rcar_lvds_get_clocks()
777 return PTR_ERR(lvds->clocks.extal); in rcar_lvds_get_clocks()
779 lvds->clocks.dotclkin[0] = rcar_lvds_get_clock(lvds, "dclkin.0", true); in rcar_lvds_get_clocks()
780 if (IS_ERR(lvds->clocks.dotclkin[0])) in rcar_lvds_get_clocks()
781 return PTR_ERR(lvds->clocks.dotclkin[0]); in rcar_lvds_get_clocks()
783 lvds->clocks.dotclkin[1] = rcar_lvds_get_clock(lvds, "dclkin.1", true); in rcar_lvds_get_clocks()
784 if (IS_ERR(lvds->clocks.dotclkin[1])) in rcar_lvds_get_clocks()
785 return PTR_ERR(lvds->clocks.dotclkin[1]); in rcar_lvds_get_clocks()
788 if (!lvds->clocks.extal && !lvds->clocks.dotclkin[0] && in rcar_lvds_get_clocks()
789 !lvds->clocks.dotclkin[1]) { in rcar_lvds_get_clocks()
790 dev_err(lvds->dev, in rcar_lvds_get_clocks()
792 return -EINVAL; in rcar_lvds_get_clocks()
819 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); in rcar_lvds_probe()
821 return -ENOMEM; in rcar_lvds_probe()
825 lvds->dev = &pdev->dev; in rcar_lvds_probe()
826 lvds->info = of_device_get_match_data(&pdev->dev); in rcar_lvds_probe()
830 lvds->info = attr->data; in rcar_lvds_probe()
836 lvds->bridge.funcs = &rcar_lvds_bridge_ops; in rcar_lvds_probe()
837 lvds->bridge.of_node = pdev->dev.of_node; in rcar_lvds_probe()
840 lvds->mmio = devm_ioremap_resource(&pdev->dev, mem); in rcar_lvds_probe()
841 if (IS_ERR(lvds->mmio)) in rcar_lvds_probe()
842 return PTR_ERR(lvds->mmio); in rcar_lvds_probe()
848 drm_bridge_add(&lvds->bridge); in rcar_lvds_probe()
857 drm_bridge_remove(&lvds->bridge); in rcar_lvds_remove()
894 { .compatible = "renesas,r8a7742-lvds", .data = &rcar_lvds_gen2_info },
895 { .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
896 { .compatible = "renesas,r8a7744-lvds", .data = &rcar_lvds_gen2_info },
897 { .compatible = "renesas,r8a774a1-lvds", .data = &rcar_lvds_gen3_info },
898 { .compatible = "renesas,r8a774b1-lvds", .data = &rcar_lvds_gen3_info },
899 { .compatible = "renesas,r8a774c0-lvds", .data = &rcar_lvds_r8a77990_info },
900 { .compatible = "renesas,r8a774e1-lvds", .data = &rcar_lvds_gen3_info },
901 { .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_gen2_info },
902 { .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
903 { .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
904 { .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
905 { .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
906 { .compatible = "renesas,r8a77965-lvds", .data = &rcar_lvds_gen3_info },
907 { .compatible = "renesas,r8a77970-lvds", .data = &rcar_lvds_r8a77970_info },
908 { .compatible = "renesas,r8a77980-lvds", .data = &rcar_lvds_gen3_info },
909 { .compatible = "renesas,r8a77990-lvds", .data = &rcar_lvds_r8a77990_info },
910 { .compatible = "renesas,r8a77995-lvds", .data = &rcar_lvds_r8a77995_info },
920 .name = "rcar-lvds",
928 MODULE_DESCRIPTION("Renesas R-Car LVDS Encoder Driver");