Lines Matching full:lvds
3 * rcar_lvds.c -- R-Car LVDS Encoder
47 #define RCAR_LVDS_QUIRK_LANES BIT(0) /* LVDS lanes 1 and 3 inverted */
56 void (*pll_setup)(struct rcar_lvds *lvds, unsigned int freq);
82 static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data) in rcar_lvds_write() argument
84 iowrite32(data, lvds->mmio + reg); in rcar_lvds_write()
91 static void rcar_lvds_pll_setup_gen2(struct rcar_lvds *lvds, unsigned int freq) in rcar_lvds_pll_setup_gen2() argument
104 rcar_lvds_write(lvds, LVDPLLCR, val); in rcar_lvds_pll_setup_gen2()
107 static void rcar_lvds_pll_setup_gen3(struct rcar_lvds *lvds, unsigned int freq) in rcar_lvds_pll_setup_gen3() argument
120 rcar_lvds_write(lvds, LVDPLLCR, val); in rcar_lvds_pll_setup_gen3()
132 static void rcar_lvds_d3_e3_pll_calc(struct rcar_lvds *lvds, struct clk *clk, in rcar_lvds_d3_e3_pll_calc() argument
148 * The LVDS PLL is made of a pre-divider and a multiplier (strangely in rcar_lvds_d3_e3_pll_calc()
162 * clock (as LVDS transmits 7 bits per lane per clock sample). in rcar_lvds_d3_e3_pll_calc()
170 * The /7 divider is optional, it is enabled when the LVDS PLL is used in rcar_lvds_d3_e3_pll_calc()
171 * to drive the LVDS encoder, and disabled when used to generate a dot in rcar_lvds_d3_e3_pll_calc()
172 * clock for the DU RGB output, without using the LVDS encoder. in rcar_lvds_d3_e3_pll_calc()
256 dev_dbg(lvds->dev, in rcar_lvds_d3_e3_pll_calc()
263 static void __rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds, in __rcar_lvds_pll_setup_d3_e3() argument
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()
286 rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr); in __rcar_lvds_pll_setup_d3_e3()
293 rcar_lvds_write(lvds, LVDDIV, LVDDIV_DIVSEL | in __rcar_lvds_pll_setup_d3_e3()
296 rcar_lvds_write(lvds, LVDDIV, 0); in __rcar_lvds_pll_setup_d3_e3()
299 static void rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds, unsigned int freq) in rcar_lvds_pll_setup_d3_e3() argument
301 __rcar_lvds_pll_setup_d3_e3(lvds, freq, false); in rcar_lvds_pll_setup_d3_e3()
310 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_clk_enable() local
313 if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL))) 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()
322 __rcar_lvds_pll_setup_d3_e3(lvds, freq, true); in rcar_lvds_clk_enable()
330 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_clk_disable() local
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()
337 rcar_lvds_write(lvds, LVDPLLCR, 0); in rcar_lvds_clk_disable()
339 clk_disable_unprepare(lvds->clocks.mod); in rcar_lvds_clk_disable()
347 static enum rcar_lvds_mode rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds, in rcar_lvds_get_lvds_mode() argument
354 * There is no API yet to retrieve LVDS mode from a bridge, only panels in rcar_lvds_get_lvds_mode()
357 if (!lvds->panel) in rcar_lvds_get_lvds_mode()
362 dev_warn(lvds->dev, in rcar_lvds_get_lvds_mode()
363 "no LVDS bus format reported, using JEIDA\n"); in rcar_lvds_get_lvds_mode()
376 dev_warn(lvds->dev, in rcar_lvds_get_lvds_mode()
377 "unsupported LVDS bus format 0x%04x, using JEIDA\n", in rcar_lvds_get_lvds_mode()
393 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in __rcar_lvds_atomic_enable() local
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()
415 rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO | in __rcar_lvds_atomic_enable()
419 if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES) in __rcar_lvds_atomic_enable()
426 rcar_lvds_write(lvds, LVDCHCR, lvdhcr); 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()
453 rcar_lvds_write(lvds, LVDSTRIPE, lvdstripe); in __rcar_lvds_atomic_enable()
460 if (lvds->link_type == RCAR_LVDS_SINGLE_LINK || lvds->companion) { in __rcar_lvds_atomic_enable()
466 lvds->info->pll_setup(lvds, mode->clock * 1000); in __rcar_lvds_atomic_enable()
469 /* Set the LVDS mode and select the input. */ in __rcar_lvds_atomic_enable()
470 lvdcr0 = rcar_lvds_get_lvds_mode(lvds, connector) << LVDCR0_LVMD_SHIFT; in __rcar_lvds_atomic_enable()
472 if (lvds->bridge.encoder) { in __rcar_lvds_atomic_enable()
477 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
480 rcar_lvds_write(lvds, LVDCR1, in __rcar_lvds_atomic_enable()
484 if (lvds->info->gen < 3) { in __rcar_lvds_atomic_enable()
485 /* Enable LVDS operation and turn the bias circuitry on. */ in __rcar_lvds_atomic_enable()
487 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
490 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) { in __rcar_lvds_atomic_enable()
496 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
499 if (lvds->info->quirks & RCAR_LVDS_QUIRK_PWD) { in __rcar_lvds_atomic_enable()
500 /* Set LVDS normal mode. */ in __rcar_lvds_atomic_enable()
502 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
505 if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) { in __rcar_lvds_atomic_enable()
507 * Turn on the LVDS PHY. On D3, the LVEN and LVRES bit must be in __rcar_lvds_atomic_enable()
511 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_PWD)) in __rcar_lvds_atomic_enable()
512 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
515 if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) { in __rcar_lvds_atomic_enable()
522 rcar_lvds_write(lvds, LVDCR0, lvdcr0); in __rcar_lvds_atomic_enable()
542 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_atomic_disable() local
544 rcar_lvds_write(lvds, LVDCR0, 0); in rcar_lvds_atomic_disable()
545 rcar_lvds_write(lvds, LVDCR1, 0); in rcar_lvds_atomic_disable()
546 rcar_lvds_write(lvds, LVDPLLCR, 0); in rcar_lvds_atomic_disable()
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()
560 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_mode_fixup() local
564 * The internal LVDS encoder has a restricted clock frequency operating in rcar_lvds_mode_fixup()
568 min_freq = lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL ? 5000 : 31000; in rcar_lvds_mode_fixup()
577 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_attach() local
579 if (!lvds->next_bridge) in rcar_lvds_attach()
582 return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge, in rcar_lvds_attach()
598 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_dual_link() local
600 return lvds->link_type != RCAR_LVDS_SINGLE_LINK; in rcar_lvds_dual_link()
606 struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); in rcar_lvds_is_connected() local
608 return lvds->next_bridge != NULL; in rcar_lvds_is_connected()
616 static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds) in rcar_lvds_parse_dt_companion() argument
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()
637 dev_err(dev, "Companion LVDS encoder is invalid\n"); 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()
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()
680 lvds->companion = of_drm_find_bridge(companion); in rcar_lvds_parse_dt_companion()
681 if (!lvds->companion) { 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()
711 static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) in rcar_lvds_parse_dt() argument
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()
729 if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) in rcar_lvds_parse_dt()
730 ret = rcar_lvds_parse_dt_companion(lvds); in rcar_lvds_parse_dt()
734 * On D3/E3 the LVDS encoder provides a clock to the DU, which can be in rcar_lvds_parse_dt()
735 * used for the DPAD output even when the LVDS output is not connected. in rcar_lvds_parse_dt()
739 if (lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL) in rcar_lvds_parse_dt()
745 static struct clk *rcar_lvds_get_clock(struct rcar_lvds *lvds, const char *name, in rcar_lvds_get_clock() argument
750 clk = devm_clk_get(lvds->dev, name); 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()
763 static int rcar_lvds_get_clocks(struct rcar_lvds *lvds) in rcar_lvds_get_clocks() argument
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()
770 * LVDS encoders without an extended PLL have no external clock inputs. 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()
815 struct rcar_lvds *lvds; in rcar_lvds_probe() local
819 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); in rcar_lvds_probe()
820 if (lvds == NULL) in rcar_lvds_probe()
823 platform_set_drvdata(pdev, lvds); 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()
832 ret = rcar_lvds_parse_dt(lvds); 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()
844 ret = rcar_lvds_get_clocks(lvds); in rcar_lvds_probe()
848 drm_bridge_add(&lvds->bridge); in rcar_lvds_probe()
855 struct rcar_lvds *lvds = platform_get_drvdata(pdev); in rcar_lvds_remove() local
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");