3  * R-Car LVDS Encoder
48 #define RCAR_LVDS_QUIRK_LANES		BIT(0)	/* LVDS lanes 1 and 3 inverted */
57 	void (*pll_setup)(struct rcar_lvds *lvds, unsigned int freq);
83 static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data)  in rcar_lvds_write()  argument
85 	iowrite32(data, lvds->mmio + reg);  in rcar_lvds_write()
92 static void rcar_lvds_pll_setup_gen2(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_gen2()  argument
105 	rcar_lvds_write(lvds, LVDPLLCR, val);  in rcar_lvds_pll_setup_gen2()
108 static void rcar_lvds_pll_setup_gen3(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_gen3()  argument
121 	rcar_lvds_write(lvds, LVDPLLCR, val);  in rcar_lvds_pll_setup_gen3()
133 static void rcar_lvds_d3_e3_pll_calc(struct rcar_lvds *lvds, struct clk *clk,  in rcar_lvds_d3_e3_pll_calc()  argument
149 	 * The LVDS PLL is made of a pre-divider and a multiplier (strangely  in rcar_lvds_d3_e3_pll_calc()
163 	 * clock (as LVDS transmits 7 bits per lane per clock sample).  in rcar_lvds_d3_e3_pll_calc()
171 	 * The /7 divider is optional, it is enabled when the LVDS PLL is used  in rcar_lvds_d3_e3_pll_calc()
172 	 * to drive the LVDS encoder, and disabled when  used to generate a dot  in rcar_lvds_d3_e3_pll_calc()
173 	 * clock for the DU RGB output, without using the LVDS encoder.  in rcar_lvds_d3_e3_pll_calc()
257 	dev_dbg(lvds->dev,  in rcar_lvds_d3_e3_pll_calc()
264 static void __rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds,  in __rcar_lvds_pll_setup_d3_e3()  argument
270 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[0], freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
272 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.dotclkin[1], freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
274 	rcar_lvds_d3_e3_pll_calc(lvds, lvds->clocks.extal, freq, &pll,  in __rcar_lvds_pll_setup_d3_e3()
287 	rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);  in __rcar_lvds_pll_setup_d3_e3()
294 		rcar_lvds_write(lvds, LVDDIV, LVDDIV_DIVSEL |  in __rcar_lvds_pll_setup_d3_e3()
297 		rcar_lvds_write(lvds, LVDDIV, 0);  in __rcar_lvds_pll_setup_d3_e3()
300 static void rcar_lvds_pll_setup_d3_e3(struct rcar_lvds *lvds, unsigned int freq)  in rcar_lvds_pll_setup_d3_e3()  argument
302 	__rcar_lvds_pll_setup_d3_e3(lvds, freq, false);  in rcar_lvds_pll_setup_d3_e3()
311 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_pclk_enable()  local
314 	if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))  in rcar_lvds_pclk_enable()
317 	dev_dbg(lvds->dev, "enabling LVDS PLL, freq=%luHz\n", freq);  in rcar_lvds_pclk_enable()
319 	ret = clk_prepare_enable(lvds->clocks.mod);  in rcar_lvds_pclk_enable()
323 	__rcar_lvds_pll_setup_d3_e3(lvds, freq, true);  in rcar_lvds_pclk_enable()
331 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_pclk_disable()  local
333 	if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))  in rcar_lvds_pclk_disable()
336 	dev_dbg(lvds->dev, "disabling LVDS PLL\n");  in rcar_lvds_pclk_disable()
338 	rcar_lvds_write(lvds, LVDPLLCR, 0);  in rcar_lvds_pclk_disable()
340 	clk_disable_unprepare(lvds->clocks.mod);  in rcar_lvds_pclk_disable()
348 static enum rcar_lvds_mode rcar_lvds_get_lvds_mode(struct rcar_lvds *lvds,  in rcar_lvds_get_lvds_mode()  argument
355 	 * There is no API yet to retrieve LVDS mode from a bridge, only panels  in rcar_lvds_get_lvds_mode()
358 	if (!lvds->panel)  in rcar_lvds_get_lvds_mode()
363 		dev_warn(lvds->dev,  in rcar_lvds_get_lvds_mode()
364 			 "no LVDS bus format reported, using JEIDA\n");  in rcar_lvds_get_lvds_mode()
377 		dev_warn(lvds->dev,  in rcar_lvds_get_lvds_mode()
378 			 "unsupported LVDS bus format 0x%04x, using JEIDA\n",  in rcar_lvds_get_lvds_mode()
394 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in __rcar_lvds_atomic_enable()  local
399 	ret = clk_prepare_enable(lvds->clocks.mod);  in __rcar_lvds_atomic_enable()
403 	/* Enable the companion LVDS encoder in dual-link mode. */  in __rcar_lvds_atomic_enable()
404 	if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion)  in __rcar_lvds_atomic_enable()
405 		__rcar_lvds_atomic_enable(lvds->companion, state, crtc,  in __rcar_lvds_atomic_enable()
416 	rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |  in __rcar_lvds_atomic_enable()
420 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)  in __rcar_lvds_atomic_enable()
427 	rcar_lvds_write(lvds, LVDCHCR, lvdhcr);  in __rcar_lvds_atomic_enable()
429 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) {  in __rcar_lvds_atomic_enable()
432 		if (lvds->link_type != RCAR_LVDS_SINGLE_LINK) {  in __rcar_lvds_atomic_enable()
440 			bool swap_pixels = lvds->link_type ==  in __rcar_lvds_atomic_enable()
445 			 * an LVDS dual-link connection.  in __rcar_lvds_atomic_enable()
451 				  | (lvds->companion && swap_pixels ?  in __rcar_lvds_atomic_enable()
454 		rcar_lvds_write(lvds, LVDSTRIPE, lvdstripe);  in __rcar_lvds_atomic_enable()
461 	if (lvds->link_type == RCAR_LVDS_SINGLE_LINK || lvds->companion) {  in __rcar_lvds_atomic_enable()
467 		lvds->info->pll_setup(lvds, mode->clock * 1000);  in __rcar_lvds_atomic_enable()
470 	/* Set the LVDS mode and select the input. */  in __rcar_lvds_atomic_enable()
471 	lvdcr0 = rcar_lvds_get_lvds_mode(lvds, connector) << LVDCR0_LVMD_SHIFT;  in __rcar_lvds_atomic_enable()
473 	if (lvds->bridge.encoder) {  in __rcar_lvds_atomic_enable()
478 	rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
481 	rcar_lvds_write(lvds, LVDCR1,  in __rcar_lvds_atomic_enable()
485 	if (lvds->info->gen < 3) {  in __rcar_lvds_atomic_enable()
486 		/* Enable LVDS operation and turn the bias circuitry on. */  in __rcar_lvds_atomic_enable()
488 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
491 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) {  in __rcar_lvds_atomic_enable()
497 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
500 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_PWD) {  in __rcar_lvds_atomic_enable()
501 		/* Set LVDS normal mode. */  in __rcar_lvds_atomic_enable()
503 		rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
506 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) {  in __rcar_lvds_atomic_enable()
508 		 * Turn on the LVDS PHY. On D3, the LVEN and LVRES bit must be  in __rcar_lvds_atomic_enable()
512 		if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_PWD))  in __rcar_lvds_atomic_enable()
513 			rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
516 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)) {  in __rcar_lvds_atomic_enable()
523 	rcar_lvds_write(lvds, LVDCR0, lvdcr0);  in __rcar_lvds_atomic_enable()
543 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_atomic_disable()  local
545 	rcar_lvds_write(lvds, LVDCR0, 0);  in rcar_lvds_atomic_disable()
546 	rcar_lvds_write(lvds, LVDCR1, 0);  in rcar_lvds_atomic_disable()
547 	rcar_lvds_write(lvds, LVDPLLCR, 0);  in rcar_lvds_atomic_disable()
549 	/* Disable the companion LVDS encoder in dual-link mode. */  in rcar_lvds_atomic_disable()
550 	if (lvds->link_type != RCAR_LVDS_SINGLE_LINK && lvds->companion)  in rcar_lvds_atomic_disable()
551 		lvds->companion->funcs->atomic_disable(lvds->companion,  in rcar_lvds_atomic_disable()
554 	clk_disable_unprepare(lvds->clocks.mod);  in rcar_lvds_atomic_disable()
561 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_mode_fixup()  local
565 	 * The internal LVDS encoder has a restricted clock frequency operating  in rcar_lvds_mode_fixup()
569 	min_freq = lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL ? 5000 : 31000;  in rcar_lvds_mode_fixup()
578 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_attach()  local
580 	if (!lvds->next_bridge)  in rcar_lvds_attach()
583 	return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge,  in rcar_lvds_attach()
599 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_dual_link()  local
601 	return lvds->link_type != RCAR_LVDS_SINGLE_LINK;  in rcar_lvds_dual_link()
607 	struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);  in rcar_lvds_is_connected()  local
609 	return lvds->next_bridge != NULL;  in rcar_lvds_is_connected()
617 static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds)  in rcar_lvds_parse_dt_companion()  argument
623 	struct device *dev = lvds->dev;  in rcar_lvds_parse_dt_companion()
627 	/* Locate the companion LVDS encoder for dual-link operation, if any. */  in rcar_lvds_parse_dt_companion()
638 		dev_err(dev, "Companion LVDS encoder is invalid\n");  in rcar_lvds_parse_dt_companion()
657 		lvds->link_type = RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS;  in rcar_lvds_parse_dt_companion()
660 		lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS;  in rcar_lvds_parse_dt_companion()
669 		if (lvds->next_bridge->timings &&  in rcar_lvds_parse_dt_companion()
670 		    lvds->next_bridge->timings->dual_link)  in rcar_lvds_parse_dt_companion()
671 			lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS;  in rcar_lvds_parse_dt_companion()
673 			lvds->link_type = RCAR_LVDS_SINGLE_LINK;  in rcar_lvds_parse_dt_companion()
676 	if (lvds->link_type == RCAR_LVDS_SINGLE_LINK) {  in rcar_lvds_parse_dt_companion()
681 	lvds->companion = of_drm_find_bridge(companion);  in rcar_lvds_parse_dt_companion()
682 	if (!lvds->companion) {  in rcar_lvds_parse_dt_companion()
691 	if (lvds->link_type == RCAR_LVDS_DUAL_LINK_ODD_EVEN_PIXELS)  in rcar_lvds_parse_dt_companion()
703 	companion_lvds = bridge_to_rcar_lvds(lvds->companion);  in rcar_lvds_parse_dt_companion()
704 	companion_lvds->link_type = lvds->link_type;  in rcar_lvds_parse_dt_companion()
712 static int rcar_lvds_parse_dt(struct rcar_lvds *lvds)  in rcar_lvds_parse_dt()  argument
716 	ret = drm_of_find_panel_or_bridge(lvds->dev->of_node, 1, 0,  in rcar_lvds_parse_dt()
717 					  &lvds->panel, &lvds->next_bridge);  in rcar_lvds_parse_dt()
721 	if (lvds->panel) {  in rcar_lvds_parse_dt()
722 		lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev,  in rcar_lvds_parse_dt()
723 							      lvds->panel);  in rcar_lvds_parse_dt()
724 		if (IS_ERR_OR_NULL(lvds->next_bridge)) {  in rcar_lvds_parse_dt()
730 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK)  in rcar_lvds_parse_dt()
731 		ret = rcar_lvds_parse_dt_companion(lvds);  in rcar_lvds_parse_dt()
735 	 * On D3/E3 the LVDS encoder provides a clock to the DU, which can be  in rcar_lvds_parse_dt()
736 	 * used for the DPAD output even when the LVDS output is not connected.  in rcar_lvds_parse_dt()
740 	if (lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)  in rcar_lvds_parse_dt()
746 static struct clk *rcar_lvds_get_clock(struct rcar_lvds *lvds, const char *name,  in rcar_lvds_get_clock()  argument
751 	clk = devm_clk_get(lvds->dev, name);  in rcar_lvds_get_clock()
758 	dev_err_probe(lvds->dev, PTR_ERR(clk), "failed to get %s clock\n",  in rcar_lvds_get_clock()
764 static int rcar_lvds_get_clocks(struct rcar_lvds *lvds)  in rcar_lvds_get_clocks()  argument
766 	lvds->clocks.mod = rcar_lvds_get_clock(lvds, NULL, false);  in rcar_lvds_get_clocks()
767 	if (IS_ERR(lvds->clocks.mod))  in rcar_lvds_get_clocks()
768 		return PTR_ERR(lvds->clocks.mod);  in rcar_lvds_get_clocks()
771 	 * LVDS encoders without an extended PLL have no external clock inputs.  in rcar_lvds_get_clocks()
773 	if (!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL))  in rcar_lvds_get_clocks()
776 	lvds->clocks.extal = rcar_lvds_get_clock(lvds, "extal", true);  in rcar_lvds_get_clocks()
777 	if (IS_ERR(lvds->clocks.extal))  in rcar_lvds_get_clocks()
778 		return PTR_ERR(lvds->clocks.extal);  in rcar_lvds_get_clocks()
780 	lvds->clocks.dotclkin[0] = rcar_lvds_get_clock(lvds, "dclkin.0", true);  in rcar_lvds_get_clocks()
781 	if (IS_ERR(lvds->clocks.dotclkin[0]))  in rcar_lvds_get_clocks()
782 		return PTR_ERR(lvds->clocks.dotclkin[0]);  in rcar_lvds_get_clocks()
784 	lvds->clocks.dotclkin[1] = rcar_lvds_get_clock(lvds, "dclkin.1", true);  in rcar_lvds_get_clocks()
785 	if (IS_ERR(lvds->clocks.dotclkin[1]))  in rcar_lvds_get_clocks()
786 		return PTR_ERR(lvds->clocks.dotclkin[1]);  in rcar_lvds_get_clocks()
789 	if (!lvds->clocks.extal && !lvds->clocks.dotclkin[0] &&  in rcar_lvds_get_clocks()
790 	    !lvds->clocks.dotclkin[1]) {  in rcar_lvds_get_clocks()
791 		dev_err(lvds->dev,  in rcar_lvds_get_clocks()
816 	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()
839 	lvds->mmio = devm_platform_ioremap_resource(pdev, 0);  in rcar_lvds_probe()
840 	if (IS_ERR(lvds->mmio))  in rcar_lvds_probe()
841 		return PTR_ERR(lvds->mmio);  in rcar_lvds_probe()
843 	ret = rcar_lvds_get_clocks(lvds);  in rcar_lvds_probe()
847 	drm_bridge_add(&lvds->bridge);  in rcar_lvds_probe()
854 	struct rcar_lvds *lvds = platform_get_drvdata(pdev);  in rcar_lvds_remove()  local
856 	drm_bridge_remove(&lvds->bridge);  in rcar_lvds_remove()
893 	{ .compatible = "renesas,r8a7742-lvds", .data = &rcar_lvds_gen2_info },
894 	{ .compatible = "renesas,r8a7743-lvds", .data = &rcar_lvds_gen2_info },
895 	{ .compatible = "renesas,r8a7744-lvds", .data = &rcar_lvds_gen2_info },
896 	{ .compatible = "renesas,r8a774a1-lvds", .data = &rcar_lvds_gen3_info },
897 	{ .compatible = "renesas,r8a774b1-lvds", .data = &rcar_lvds_gen3_info },
898 	{ .compatible = "renesas,r8a774c0-lvds", .data = &rcar_lvds_r8a77990_info },
899 	{ .compatible = "renesas,r8a774e1-lvds", .data = &rcar_lvds_gen3_info },
900 	{ .compatible = "renesas,r8a7790-lvds", .data = &rcar_lvds_gen2_info },
901 	{ .compatible = "renesas,r8a7791-lvds", .data = &rcar_lvds_gen2_info },
902 	{ .compatible = "renesas,r8a7793-lvds", .data = &rcar_lvds_gen2_info },
903 	{ .compatible = "renesas,r8a7795-lvds", .data = &rcar_lvds_gen3_info },
904 	{ .compatible = "renesas,r8a7796-lvds", .data = &rcar_lvds_gen3_info },
905 	{ .compatible = "renesas,r8a77961-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");