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);
86 static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data)  in rcar_lvds_write()  argument
88 	iowrite32(data, lvds->mmio + reg);  in rcar_lvds_write()
97 	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);  in rcar_lvds_connector_get_modes()  local
99 	return drm_panel_get_modes(lvds->panel, connector);  in rcar_lvds_connector_get_modes()
105 	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);  in rcar_lvds_connector_atomic_check()  local
115 		dev_dbg(lvds->dev, "connector: empty modes list\n");  in rcar_lvds_connector_atomic_check()
154 static void rcar_lvds_pll_setup_gen2(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_gen2()  argument
167 	rcar_lvds_write(lvds, LVDPLLCR, val);  in rcar_lvds_pll_setup_gen2()
170 static void rcar_lvds_pll_setup_gen3(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_gen3()  argument
183 	rcar_lvds_write(lvds, LVDPLLCR, val);  in rcar_lvds_pll_setup_gen3()
195 static void rcar_lvds_d3_e3_pll_calc(struct rcar_lvds *lvds, struct clk *clk,  in rcar_lvds_d3_e3_pll_calc()  argument
211 	 * The LVDS PLL is made of a pre-divider and a multiplier (strangely  in rcar_lvds_d3_e3_pll_calc()
225 	 * clock (as LVDS transmits 7 bits per lane per clock sample).  in rcar_lvds_d3_e3_pll_calc()
233 	 * The /7 divider is optional, it is enabled when the LVDS PLL is used  in rcar_lvds_d3_e3_pll_calc()
234 	 * to drive the LVDS encoder, and disabled when  used to generate a dot  in rcar_lvds_d3_e3_pll_calc()
235 	 * clock for the DU RGB output, without using the LVDS encoder.  in rcar_lvds_d3_e3_pll_calc()
319 	dev_dbg(lvds->dev,  in rcar_lvds_d3_e3_pll_calc()
326 static void __rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds,  in __rcar_lvds_pll_setup_d3_e3()  argument
332 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[0], freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
334 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[1], freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
336 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.extal, freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
349 	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);  in __rcar_lvds_pll_setup_d3_e3()
356 		rcar_lvds_write(lvds, LVDDIV, LVDDIV_DIVSEL |  in __rcar_lvds_pll_setup_d3_e3()
359 		rcar_lvds_write(lvds, LVDDIV, 0);  in __rcar_lvds_pll_setup_d3_e3()
362 static void rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_d3_e3()  argument
364 	__rcar_lvds_pll_setup_d3_e3(lvds, freq, false);  in rcar_lvds_pll_setup_d3_e3()
373 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_clk_enable()  local
376 	if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))  in rcar_lvds_clk_enable()
379 	dev_dbg(lvds->dev, "enabling LVDS PLL, freq=%luHz\n", freq);  in rcar_lvds_clk_enable()
381 	ret = clk_prepare_enable(lvds->clocks.mod);  in rcar_lvds_clk_enable()
385 	__rcar_lvds_pll_setup_d3_e3(lvds, freq, true);  in rcar_lvds_clk_enable()
393 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_clk_disable()  local
395 	if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))  in rcar_lvds_clk_disable()
398 	dev_dbg(lvds->dev, "disabling LVDS PLL\n");  in rcar_lvds_clk_disable()
400 	rcar_lvds_write(lvds, LVDPLLCR, 0);  in rcar_lvds_clk_disable()
402 	clk_disable_unprepare(lvds->clocks.mod);  in rcar_lvds_clk_disable()
410 static enum rcar_lvds_mode rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds,  in rcar_lvds_get_lvds_mode()  argument
417 	 * There is no API yet to retrieve LVDS mode from a bridge, only panels  in rcar_lvds_get_lvds_mode()
420 	if (!lvds->panel)  in rcar_lvds_get_lvds_mode()
425 		dev_warn(lvds->dev,  in rcar_lvds_get_lvds_mode()
426 			 "no LVDS bus format reported, using JEIDA\n");  in rcar_lvds_get_lvds_mode()
439 		dev_warn(lvds->dev,  in rcar_lvds_get_lvds_mode()
440 			 "unsupported LVDS bus format 0x%04x, using JEIDA\n",  in rcar_lvds_get_lvds_mode()
456 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in __rcar_lvds_atomic_enable()  local
461 	ret = clk_prepare_enable(lvds->clocks.mod);  in __rcar_lvds_atomic_enable()
465 	/* Enable the companion LVDS encoder in dual-link mode. */  in __rcar_lvds_atomic_enable()
466 	if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion)  in __rcar_lvds_atomic_enable()
467 		__rcar_lvds_atomic_enable(lvds->companion, state, crtc,  in __rcar_lvds_atomic_enable()
478 	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |  in __rcar_lvds_atomic_enable()
482 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)  in __rcar_lvds_atomic_enable()
489 	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);  in __rcar_lvds_atomic_enable()
491 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) {  in __rcar_lvds_atomic_enable()
494 		if (lvds->link_type != RCAR_LVDS_SINGLE_LINK) {  in __rcar_lvds_atomic_enable()
502 			bool swap_pixels = lvds->link_type ==  in __rcar_lvds_atomic_enable()
507 			 * an LVDS dual-link connection.  in __rcar_lvds_atomic_enable()
513 				  | (lvds->companion && swap_pixels ?  in __rcar_lvds_atomic_enable()
516 		rcar_lvds_write(lvds, LVDSTRIPE, lvdstripe);  in __rcar_lvds_atomic_enable()
523 	if (lvds->link_type == RCAR_LVDS_SINGLE_LINK || lvds->companion) {  in __rcar_lvds_atomic_enable()
529 		lvds->info->pll_setup(lvds, mode->clock * 1000);  in __rcar_lvds_atomic_enable()
532 	/* Set the LVDS mode and select the input. */  in __rcar_lvds_atomic_enable()
533 	lvdcr0 = rcar_lvds_get_lvds_mode(lvds, connector) << LVDCR0_LVMD_SHIFT;  in __rcar_lvds_atomic_enable()
535 	if (lvds->bridge.encoder) {  in __rcar_lvds_atomic_enable()
540 	rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
543 	rcar_lvds_write(lvds, LVDCR1,  in __rcar_lvds_atomic_enable()
547 	if (lvds->info->gen < 3) {  in __rcar_lvds_atomic_enable()
548 		/* Enable LVDS operation and turn the bias circuitry on. */  in __rcar_lvds_atomic_enable()
550 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
553 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) {  in __rcar_lvds_atomic_enable()
559 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
562 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_PWD) {  in __rcar_lvds_atomic_enable()
563 		/* Set LVDS normal mode. */  in __rcar_lvds_atomic_enable()
565 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
568 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) {  in __rcar_lvds_atomic_enable()
570 		 * Turn on the LVDS PHY. On D3, the LVEN and LVRES bit must be  in __rcar_lvds_atomic_enable()
574 		if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_PWD))  in __rcar_lvds_atomic_enable()
575 			rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
578 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) {  in __rcar_lvds_atomic_enable()
585 	rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
587 	if (lvds->panel) {  in __rcar_lvds_atomic_enable()
588 		drm_panel_prepare(lvds->panel);  in __rcar_lvds_atomic_enable()
589 		drm_panel_enable(lvds->panel);  in __rcar_lvds_atomic_enable()
610 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_atomic_disable()  local
612 	if (lvds->panel) {  in rcar_lvds_atomic_disable()
613 		drm_panel_disable(lvds->panel);  in rcar_lvds_atomic_disable()
614 		drm_panel_unprepare(lvds->panel);  in rcar_lvds_atomic_disable()
617 	rcar_lvds_write(lvds, LVDCR0, 0);  in rcar_lvds_atomic_disable()
618 	rcar_lvds_write(lvds, LVDCR1, 0);  in rcar_lvds_atomic_disable()
619 	rcar_lvds_write(lvds, LVDPLLCR, 0);  in rcar_lvds_atomic_disable()
621 	/* Disable the companion LVDS encoder in dual-link mode. */  in rcar_lvds_atomic_disable()
622 	if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion)  in rcar_lvds_atomic_disable()
623 		lvds->companion->funcs->atomic_disable(lvds->companion,  in rcar_lvds_atomic_disable()
626 	clk_disable_unprepare(lvds->clocks.mod);  in rcar_lvds_atomic_disable()
633 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_mode_fixup()  local
637 	 * The internal LVDS encoder has a restricted clock frequency operating  in rcar_lvds_mode_fixup()
641 	min_freq = lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL ? 5000 : 31000;  in rcar_lvds_mode_fixup()
650 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_attach()  local
651 	struct drm_connector *connector = &lvds->connector;  in rcar_lvds_attach()
656 	if (lvds->next_bridge)  in rcar_lvds_attach()
657 		return drm_bridge_attach(bridge->encoder, lvds->next_bridge,  in rcar_lvds_attach()
666 	if (!lvds->panel)  in rcar_lvds_attach()
700 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_dual_link()  local
702 	return lvds->link_type != RCAR_LVDS_SINGLE_LINK;  in rcar_lvds_dual_link()
710 static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds)  in rcar_lvds_parse_dt_companion()  argument
716 	struct device *dev = lvds->dev;  in rcar_lvds_parse_dt_companion()
720 	/* Locate the companion LVDS encoder for dual-link operation, if any. */  in rcar_lvds_parse_dt_companion()
731 		dev_err(dev, "Companion LVDS encoder is invalid\n");  in rcar_lvds_parse_dt_companion()
750 		lvds->link_type = RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS;  in rcar_lvds_parse_dt_companion()
753 		lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS;  in rcar_lvds_parse_dt_companion()
762 		if (lvds->next_bridge && lvds->next_bridge->timings &&  in rcar_lvds_parse_dt_companion()
763 		    lvds->next_bridge->timings->dual_link)  in rcar_lvds_parse_dt_companion()
764 			lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS;  in rcar_lvds_parse_dt_companion()
766 			lvds->link_type = RCAR_LVDS_SINGLE_LINK;  in rcar_lvds_parse_dt_companion()
769 	if (lvds->link_type == RCAR_LVDS_SINGLE_LINK) {  in rcar_lvds_parse_dt_companion()
774 	lvds->companion = of_drm_find_bridge(companion);  in rcar_lvds_parse_dt_companion()
775 	if (!lvds->companion) {  in rcar_lvds_parse_dt_companion()
784 	if (lvds->link_type == RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS)  in rcar_lvds_parse_dt_companion()
796 	companion_lvds = bridge_to_rcar_lvds(lvds->companion);  in rcar_lvds_parse_dt_companion()
797 	companion_lvds->link_type = lvds->link_type;  in rcar_lvds_parse_dt_companion()
805 static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)  in rcar_lvds_parse_dt()  argument
809 	ret = drm_of_find_panel_or_bridge(lvds->dev->of_node, 1, 0,  in rcar_lvds_parse_dt()
810 					  &lvds->panel, &lvds->next_bridge);  in rcar_lvds_parse_dt()
814 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK)  in rcar_lvds_parse_dt()
815 		ret = rcar_lvds_parse_dt_companion(lvds);  in rcar_lvds_parse_dt()
819 	 * On D3/E3 the LVDS encoder provides a clock to the DU, which can be  in rcar_lvds_parse_dt()
820 	 * used for the DPAD output even when the LVDS output is not connected.  in rcar_lvds_parse_dt()
824 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)  in rcar_lvds_parse_dt()
830 static struct clk *rcar_lvds_get_clock(struct rcar_lvds *lvds, const char *name,  in rcar_lvds_get_clock()  argument
835 	clk = devm_clk_get(lvds->dev, name);  in rcar_lvds_get_clock()
843 		dev_err(lvds->dev, "failed to get %s clock\n",  in rcar_lvds_get_clock()
849 static int rcar_lvds_get_clocks(struct rcar_lvds *lvds)  in rcar_lvds_get_clocks()  argument
851 	lvds->clocks.mod = rcar_lvds_get_clock(lvds, NULL, false);  in rcar_lvds_get_clocks()
852 	if (IS_ERR(lvds->clocks.mod))  in rcar_lvds_get_clocks()
853 		return PTR_ERR(lvds->clocks.mod);  in rcar_lvds_get_clocks()
856 	 * LVDS encoders without an extended PLL have no external clock inputs.  in rcar_lvds_get_clocks()
858 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL))  in rcar_lvds_get_clocks()
861 	lvds->clocks.extal = rcar_lvds_get_clock(lvds, "extal", true);  in rcar_lvds_get_clocks()
862 	if (IS_ERR(lvds->clocks.extal))  in rcar_lvds_get_clocks()
863 		return PTR_ERR(lvds->clocks.extal);  in rcar_lvds_get_clocks()
865 	lvds->clocks.dotclkin[0] = rcar_lvds_get_clock(lvds, "dclkin.0", true);  in rcar_lvds_get_clocks()
866 	if (IS_ERR(lvds->clocks.dotclkin[0]))  in rcar_lvds_get_clocks()
867 		return PTR_ERR(lvds->clocks.dotclkin[0]);  in rcar_lvds_get_clocks()
869 	lvds->clocks.dotclkin[1] = rcar_lvds_get_clock(lvds, "dclkin.1", true);  in rcar_lvds_get_clocks()
870 	if (IS_ERR(lvds->clocks.dotclkin[1]))  in rcar_lvds_get_clocks()
871 		return PTR_ERR(lvds->clocks.dotclkin[1]);  in rcar_lvds_get_clocks()
874 	if (!lvds->clocks.extal && !lvds->clocks.dotclkin[0] &&  in rcar_lvds_get_clocks()
875 	    !lvds->clocks.dotclkin[1]) {  in rcar_lvds_get_clocks()
876 		dev_err(lvds->dev,  in rcar_lvds_get_clocks()
901 	struct rcar_lvds *lvds;  in rcar_lvds_probe()  local
905 	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);  in rcar_lvds_probe()
906 	if (lvds == NULL)  in rcar_lvds_probe()
909 	platform_set_drvdata(pdev, lvds);  in rcar_lvds_probe()
911 	lvds->dev = &pdev->dev;  in rcar_lvds_probe()
912 	lvds->info = of_device_get_match_data(&pdev->dev);  in rcar_lvds_probe()
916 		lvds->info = attr->data;  in rcar_lvds_probe()
918 	ret = rcar_lvds_parse_dt(lvds);  in rcar_lvds_probe()
922 	lvds->bridge.driver_private = lvds;  in rcar_lvds_probe()
923 	lvds->bridge.funcs = &rcar_lvds_bridge_ops;  in rcar_lvds_probe()
924 	lvds->bridge.of_node = pdev->dev.of_node;  in rcar_lvds_probe()
927 	lvds->mmio = devm_ioremap_resource(&pdev->dev, mem);  in rcar_lvds_probe()
928 	if (IS_ERR(lvds->mmio))  in rcar_lvds_probe()
929 		return PTR_ERR(lvds->mmio);  in rcar_lvds_probe()
931 	ret = rcar_lvds_get_clocks(lvds);  in rcar_lvds_probe()
935 	drm_bridge_add(&lvds->bridge);  in rcar_lvds_probe()
942 	struct rcar_lvds *lvds = platform_get_drvdata(pdev);  in rcar_lvds_remove()  local
944 	drm_bridge_remove(&lvds->bridge);  in rcar_lvds_remove()
981 	{ .compatible = "renesas,r8a7742-lvds", .data = &rcar_lvds_gen2_info },
982 	{ .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
983 	{ .compatible = "renesas,r8a7744-lvds", .data = &rcar_lvds_gen2_info },
984 	{ .compatible = "renesas,r8a774a1-lvds", .data = &rcar_lvds_gen3_info },
985 	{ .compatible = "renesas,r8a774b1-lvds", .data = &rcar_lvds_gen3_info },
986 	{ .compatible = "renesas,r8a774c0-lvds", .data = &rcar_lvds_r8a77990_info },
987 	{ .compatible = "renesas,r8a774e1-lvds", .data = &rcar_lvds_gen3_info },
988 	{ .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_gen2_info },
989 	{ .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
990 	{ .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
991 	{ .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
992 	{ .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
993 	{ .compatible = "renesas,r8a77965-lvds", .data = &rcar_lvds_gen3_info },
994 	{ .compatible = "renesas,r8a77970-lvds", .data = &rcar_lvds_r8a77970_info },
995 	{ .compatible = "renesas,r8a77980-lvds", .data = &rcar_lvds_gen3_info },
996 	{ .compatible = "renesas,r8a77990-lvds", .data = &rcar_lvds_r8a77990_info },
997 	{ .compatible = "renesas,r8a77995-lvds", .data = &rcar_lvds_r8a77995_info },
1007 		.name	= "rcar-lvds",
1015 MODULE_DESCRIPTION("Renesas R-Car LVDS Encoder Driver");