Contributors: 2
Author Tokens Token Proportion Commits Commit Proportion
Angelo G. Del Regno 6377 99.84% 1 50.00%
Nathan Chancellor 10 0.16% 1 50.00%
Total 6387 2 


// SPDX-License-Identifier: GPL-2.0-only
/*
 * Himax HX8279 DriverIC panels driver
 *
 * Copyright (c) 2025 Collabora Ltd.
 *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
 */

#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>

#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>

/* Page selection */
#define HX8279_REG_PAGE			0xb0
 #define HX8279_PAGE_SEL		GENMASK(3, 0)

/* Page 0 - Driver/Module Configuration */
#define HX8279_P0_VGHS			0xbf
#define HX8279_P0_VGLS			0xc0
#define HX8279_P0_VGPHS			0xc2
#define HX8279_P0_VGNHS			0xc4
 #define HX8279_P0_VG_SEL		GENMASK(4, 0)
 #define HX8279_VGH_MIN_MV		8700
 #define HX8279_VGH_STEP_MV		300
 #define HX8279_VGL_MIN_MV		6700
 #define HX8279_VGL_STEP_MV		300
 #define HX8279_VGPNH_MIN_MV		4000
 #define HX8279_VGPNX_STEP_MV		50
 #define HX8279_VGH_VOLT_SEL(x)		((x - HX8279_VGH_MIN_MV) / HX8279_VGH_STEP_MV)
 #define HX8279_VGL_VOLT_SEL(x)		((x - HX8279_VGL_MIN_MV) / HX8279_VGL_STEP_MV)
 #define HX8279_VGPN_VOLT_SEL(x)	((x - HX8279_VGPNH_MIN_MV) / HX8279_VGPNX_STEP_MV)

/* Page 1 - Gate driver On Array (GOA) Mux */
#define HX8279_P1_REG_GOA_L		0xc0
#define HX8279_P1_REG_GOUTL(x)		(HX8279_P1_REG_GOA_L + (x))
#define HX8279_P1_REG_GOA_R		0xd4
#define HX8279_P1_REG_GOUTR(x)		(HX8279_P1_REG_GOA_R + (x))
 #define HX8279_GOUT_STB		GENMASK(7, 6)
 #define HX8279_GOUT_SEL		GENMASK(5, 0)

/* Page 2 - Analog Gamma Configuration */
#define HX8279_P2_REG_ANALOG_GAMMA	0xc0
 #define HX8279_P2_REG_GAMMA_T_PVP(x)	(HX8279_P2_REG_ANALOG_GAMMA + (x))	/* 0..16 */
 #define HX8279_P2_REG_GAMMA_T_PVN(x)	(HX8279_P2_REG_GAMMA_T_PVP(17) + (x))	/* 0..16 */

/* Page 3 - Gate driver On Array (GOA) Configuration */
#define HX8279_P3_REG_UNKNOWN_BA	0xba
#define HX8279_P3_REG_GOA_CKV_FALL_PREC	0xbc
#define HX8279_P3_REG_GOA_TIMING_ODD	0xc2
 #define HX8279_P3_REG_GOA_TO(x)	(HX8279_P3_REG_GOA_TIMING_ODD + x) /* GOA_T0..5 */
#define HX8279_P3_REG_GOA_STVL		0xc8
 #define HX8279_P3_GOA_STV_LEAD		GENMASK(4, 0)
#define HX8279_P3_REG_GOA_CKVL		0xc9
 #define HX8279_P3_GOA_CKV_LEAD		GENMASK(4, 0)
#define HX8279_P3_REG_GOA_CKVD		0xca
 #define HX8279_P3_GOA_CKV_NONOVERLAP	BIT(7)
 #define HX8279_P3_GOA_CKV_RESERVED	BIT(6)
 #define HX8279_P3_GOA_CKV_DUMMY	GENMASK(5, 0)
#define HX8279_P3_REG_GOA_CKV_RISE_PREC	0xcb
#define HX8279_P3_REG_GOA_CLR1_W_ADJ	0xd2
#define HX8279_P3_REG_GOA_CLR234_W_ADJ	0xd3
#define HX8279_P3_REG_GOA_CLR1_CFG	0xd4
#define HX8279_P3_REG_GOA_CLR_CFG(x)	(HX8279_P3_REG_GOA_CLR1_CFG + (x)) /* CLR1..4 */
 #define HX8279_P3_GOA_CLR_CFG_POLARITY	BIT(7)
 #define HX8279_P3_GOA_CLR_CFG_STARTPOS	GENMASK(6, 0)
#define HX8279_P3_REG_GOA_TIMING_EVEN	0xdd
 #define HX8279_P3_REG_GOA_TE(x)	(HX8279_P3_REG_GOA_TIMING_EVEN + x)
#define HX8279_P3_REG_UNKNOWN_E4	0xe4
#define HX8279_P3_REG_UNKNOWN_E5	0xe5

/* Page 5 - MIPI */
#define HX8279_P5_REG_TIMING		0xb3
 #define HX8279_P5_TIMING_THS_SETTLE	GENMASK(7, 5)
 #define HX8279_P5_TIMING_LHS_SETTLE	BIT(4)
 #define HX8279_P5_TIMING_TLPX		GENMASK(3, 0)
#define HX8279_P5_REG_UNKNOWN_B8	0xb8
#define HX8279_P5_REG_UNKNOWN_BC	0xbc
#define HX8279_P5_REG_UNKNOWN_D6	0xd6

/* Page 6 - Engineer */
#define HX8279_P6_REG_ENGINEER_PWD	0xb8
#define HX8279_P6_REG_INHOUSE_FUNC	0xc0
 #define HX8279_P6_ENG_UNLOCK_WORD	0xa5
#define HX8279_P6_REG_GAMMA_CHOPPER	0xbc
 #define HX8279_P6_GAMMA_POCGM_CTL	GENMASK(6, 4)
 #define HX8279_P6_GAMMA_POGCMD_CTL	GENMASK(2, 0)
#define HX8279_P6_REG_VOLT_ADJ		0xc7
 /* For VCCIFS and VCCS - 0: 1450, 1: 1500, 2: 1550, 3: 1600 uV */
 #define HX8279_P6_VOLT_ADJ_VCCIFS	GENMASK(3, 2)
 #define HX8279_P6_VOLT_ADJ_VCCS	GENMASK(1, 0)
#define HX8279_P6_REG_DLY_TIME_ADJ	0xd5

/* Page 7...12 - Digital Gamma Adjustment */
#define HX8279_PG_DIGITAL_GAMMA		0xb1
#define HX8279_DGAMMA_DGMA1_HI		GENMASK(7, 6)
#define HX8279_DGAMMA_DGMA2_HI		GENMASK(5, 4)
#define HX8279_DGAMMA_DGMA3_HI		GENMASK(3, 2)
#define HX8279_DGAMMA_DGMA4_HI		GENMASK(1, 0)
#define HX8279_PG_DGAMMA_NUM_LO_BYTES	24
#define HX8279_PG_DGAMMA_NUM_HI_BYTES	6

struct hx8279 {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi[2];
	struct regulator_bulk_data vregs[2];
	struct gpio_desc *enable_gpio;
	struct gpio_desc *reset_gpio;
	const struct hx8279_panel_desc *desc;
	u8 last_page;
	bool skip_voltage_config;
	bool skip_goa_config;
	bool skip_goa_timing;
	bool skip_goa_even_timing;
	bool skip_mipi_timing;
};

struct hx8279_panel_mode {
	const struct drm_display_mode mode;
	u8 bpc;
	bool is_video_mode;
};

/**
 * struct hx8279_goa_mux - Gate driver On Array Muxer
 * @gout_l: Mux GOA signal to GOUT Left pin
 * @gout_r: Mux GOA signal to GOUT Right pin
 */
struct hx8279_goa_mux {
	u8 gout_l[20];
	u8 gout_r[20];
};

/**
 * struct hx8279_analog_gamma - Analog Gamma Adjustment
 * @pos: Positive gamma op's input voltage, adjusted by VGP(H/L)
 * @neg: Negative gamma op's input voltage, adjusted by VGN(H/L)
 *
 * Analog Gamma correction is performed with 17+17 reference voltages,
 * changed with resistor streams, and defined with 17 register values
 * for positive and 17 for negative.
 *
 * Each register holds resistance values, in 8.5ohms per unit, for the
 * following gamma levels:
 * 0, 8, 16, 28, 40, 56, 80, 128, 176, 200, 216, 228, 240, 248, 252, 255.
 */
struct hx8279_analog_gamma {
	u8 pos[17];
	u8 neg[17];
};

/**
 * struct hx8279_digital_gamma - Digital Gamma Adjustment
 * @r: Adjustment for red component
 * @g: Adjustment for green component
 * @b: Adjustment for blue component
 *
 * The layout of this structure follows the register layout to simplify
 * both the handling and the declaration of those values in the driver.
 * Gamma correction is internally done with a 24 segment piecewise
 * linear interpolation; those segments are defined with 24 ten bits
 * values of which:
 *   - The LOW eight bits for the first 24 registers start at the first
 *     register (at 0xb1) of the Digital Gamma Adjustment page;
 *   - The HIGH two bits for each of the 24 registers are contained
 *     in the last six registers;
 *   - The last six registers contain four groups of two-bits HI values
 *     for each of the first 24 registers, but in an inverted fashion,
 *     this means that the first two bits relate to the last register
 *     of a set of four.
 *
 * The 24 segments refer to the following gamma levels:
 * 0, 1, 3, 7, 11, 15, 23, 31, 47, 63, 95, 127, 128, 160,
 * 192, 208, 224, 232, 240, 244, 248, 252, 254, 255
 */
struct hx8279_digital_gamma {
	u8 r[HX8279_PG_DGAMMA_NUM_LO_BYTES + HX8279_PG_DGAMMA_NUM_HI_BYTES];
	u8 g[HX8279_PG_DGAMMA_NUM_LO_BYTES + HX8279_PG_DGAMMA_NUM_HI_BYTES];
	u8 b[HX8279_PG_DGAMMA_NUM_LO_BYTES + HX8279_PG_DGAMMA_NUM_HI_BYTES];
};

struct hx8279_panel_desc {
	const struct mipi_dsi_device_info dsi_info;
	const struct hx8279_panel_mode *mode_data;
	u8 num_lanes;
	u8 num_modes;

	/* Page 0 */
	unsigned int vgh_mv;
	unsigned int vgl_mv;
	unsigned int vgph_mv;
	unsigned int vgnh_mv;

	/* Page 1 */
	const struct hx8279_goa_mux *gmux;

	/* Page 2 */
	const struct hx8279_analog_gamma *agamma;

	/* Page 3 */
	u8 goa_unk_ba;
	u8 goa_odd_timing[6];
	u8 goa_even_timing[6];
	u8 goa_stv_lead_time_ck;
	u8 goa_ckv_lead_time_ck;
	u8 goa_ckv_dummy_vblank_num;
	u8 goa_ckv_rise_precharge;
	u8 goa_ckv_fall_precharge;
	bool goa_ckv_non_overlap_ctl;
	u8 goa_clr1_width_adj;
	u8 goa_clr234_width_adj;
	s8 goa_clr_polarity[4];
	int goa_clr_start_pos[4];
	u8 goa_unk_e4;
	u8 goa_unk_e5;

	/* Page 5 */
	u8 bta_tlpx;
	bool lhs_settle_time_by_osc25;
	u8 ths_settle_time;
	u8 timing_unk_b8;
	u8 timing_unk_bc;
	u8 timing_unk_d6;

	/* Page 6 */
	u8 gamma_ctl;
	u8 volt_adj;
	u8 src_delay_time_adj_ck;

	/* Page 7..12 */
	const struct hx8279_digital_gamma *dgamma;
};

static inline struct hx8279 *to_hx8279(struct drm_panel *panel)
{
	return container_of(panel, struct hx8279, panel);
}

static void hx8279_set_page(struct hx8279 *hx,
			    struct mipi_dsi_multi_context *dsi_ctx, u8 page)
{
	const u8 cmd_set_page[] = { HX8279_REG_PAGE, page };

	if (hx->last_page == page)
		return;

	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_page, ARRAY_SIZE(cmd_set_page));
	if (!dsi_ctx->accum_err)
		hx->last_page = page;
}

static void hx8279_set_module_config(struct hx8279 *hx,
				     struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	u8 cmd_set_voltage[2];

	if (hx->skip_voltage_config)
		return;

	/* Page 0 - Driver/Module Configuration */
	hx8279_set_page(hx, dsi_ctx, 0);

	if (desc->vgh_mv) {
		cmd_set_voltage[0] = HX8279_P0_VGHS;
		cmd_set_voltage[1] = HX8279_VGH_VOLT_SEL(desc->vgh_mv);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_voltage,
					     ARRAY_SIZE(cmd_set_voltage));
	}

	if (desc->vgl_mv) {
		cmd_set_voltage[0] = HX8279_P0_VGLS;
		cmd_set_voltage[1] = HX8279_VGL_VOLT_SEL(desc->vgl_mv);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_voltage,
					     ARRAY_SIZE(cmd_set_voltage));
	}

	if (desc->vgph_mv) {
		cmd_set_voltage[0] = HX8279_P0_VGPHS;
		cmd_set_voltage[1] = HX8279_VGPN_VOLT_SEL(desc->vgph_mv);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_voltage,
					     ARRAY_SIZE(cmd_set_voltage));
	}

	if (desc->vgnh_mv) {
		cmd_set_voltage[0] = HX8279_P0_VGNHS;
		cmd_set_voltage[1] = HX8279_VGPN_VOLT_SEL(desc->vgnh_mv);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_voltage,
					     ARRAY_SIZE(cmd_set_voltage));
	}
}

static void hx8279_set_gmux(struct hx8279 *hx,
			    struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_goa_mux *gmux = hx->desc->gmux;
	u8 cmd_set_gmux[2];
	int i;

	if (!gmux)
		return;

	hx8279_set_page(hx, dsi_ctx, 1);

	for (i = 0; i < ARRAY_SIZE(gmux->gout_l); i++) {
		cmd_set_gmux[0] = HX8279_P1_REG_GOUTL(i);
		cmd_set_gmux[1] = gmux->gout_l[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_gmux,
					     ARRAY_SIZE(cmd_set_gmux));
	}

	for (i = 0; i < ARRAY_SIZE(gmux->gout_r); i++) {
		cmd_set_gmux[0] = HX8279_P1_REG_GOUTR(i);
		cmd_set_gmux[1] = gmux->gout_r[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_gmux,
					     ARRAY_SIZE(cmd_set_gmux));
	}
}

static void hx8279_set_analog_gamma(struct hx8279 *hx,
				    struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_analog_gamma *agamma = hx->desc->agamma;
	u8 cmd_set_ana_gamma[2];
	int i;

	if (!agamma)
		return;

	hx8279_set_page(hx, dsi_ctx, 2);

	for (i = 0; i < ARRAY_SIZE(agamma->pos); i++) {
		cmd_set_ana_gamma[0] = HX8279_P2_REG_GAMMA_T_PVP(i);
		cmd_set_ana_gamma[1] = agamma->pos[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_ana_gamma,
					     ARRAY_SIZE(cmd_set_ana_gamma));
	}

	for (i = 0; i < ARRAY_SIZE(agamma->neg); i++) {
		cmd_set_ana_gamma[0] = HX8279_P2_REG_GAMMA_T_PVN(i);
		cmd_set_ana_gamma[1] = agamma->neg[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_ana_gamma,
					     ARRAY_SIZE(cmd_set_ana_gamma));
	}
}

static void hx8279_set_goa_timing(struct hx8279 *hx,
				  struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	u8 cmd_set_goa_t[2];
	int i;

	if (hx->skip_goa_timing)
		return;

	hx8279_set_page(hx, dsi_ctx, 3);

	for (i = 0; i < ARRAY_SIZE(desc->goa_odd_timing); i++) {
		cmd_set_goa_t[0] = HX8279_P3_REG_GOA_TO(i);
		cmd_set_goa_t[1] = desc->goa_odd_timing[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa_t,
					     ARRAY_SIZE(cmd_set_goa_t));
	}

	for (i = 0; i < ARRAY_SIZE(desc->goa_even_timing); i++) {
		cmd_set_goa_t[0] = HX8279_P3_REG_GOA_TE(i);
		cmd_set_goa_t[1] = desc->goa_odd_timing[i];
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa_t,
					     ARRAY_SIZE(cmd_set_goa_t));
	}
}

static void hx8279_set_goa_cfg(struct hx8279 *hx,
			       struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	u8 cmd_set_goa[2];
	int i;

	if (hx->skip_goa_config)
		return;

	hx8279_set_page(hx, dsi_ctx, 3);

	if (desc->goa_unk_ba)  {
		cmd_set_goa[0] = HX8279_P3_REG_UNKNOWN_BA;
		cmd_set_goa[1] = desc->goa_unk_ba;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_stv_lead_time_ck) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_STVL;
		cmd_set_goa[1] = FIELD_PREP(HX8279_P3_GOA_STV_LEAD,
					    desc->goa_stv_lead_time_ck);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_ckv_lead_time_ck) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_CKVL;
		cmd_set_goa[1] = FIELD_PREP(HX8279_P3_GOA_CKV_DUMMY,
					    desc->goa_ckv_lead_time_ck);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_ckv_dummy_vblank_num) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_CKVD;
		cmd_set_goa[1] = FIELD_PREP(HX8279_P3_GOA_CKV_LEAD,
					    desc->goa_ckv_dummy_vblank_num);
		cmd_set_goa[1] |= FIELD_PREP(HX8279_P3_GOA_CKV_NONOVERLAP,
					     desc->goa_ckv_non_overlap_ctl);
		/* RESERVED must be always set */
		cmd_set_goa[1] |= HX8279_P3_GOA_CKV_RESERVED;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	/*
	 * One of the two being more than zero means that we want to write
	 * both of them. Anyway, the register default is zero in this case.
	 */
	if (desc->goa_ckv_rise_precharge || desc->goa_ckv_fall_precharge) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_CKV_RISE_PREC;
		cmd_set_goa[1] = desc->goa_ckv_rise_precharge;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));

		cmd_set_goa[0] = HX8279_P3_REG_GOA_CKV_FALL_PREC;
		cmd_set_goa[1] = desc->goa_ckv_fall_precharge;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_clr1_width_adj) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_CLR1_W_ADJ;
		cmd_set_goa[1] = desc->goa_clr1_width_adj;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_clr234_width_adj) {
		cmd_set_goa[0] = HX8279_P3_REG_GOA_CLR234_W_ADJ;
		cmd_set_goa[1] = desc->goa_clr234_width_adj;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	/* Polarity and Start Position arrays are of the same size */
	for (i = 0; i < ARRAY_SIZE(desc->goa_clr_polarity); i++) {
		if (desc->goa_clr_polarity[i] < 0 || desc->goa_clr_start_pos[i] < 0)
			continue;

		cmd_set_goa[0] = HX8279_P3_REG_GOA_CLR_CFG(i);
		cmd_set_goa[1] = FIELD_PREP(HX8279_P3_GOA_CLR_CFG_STARTPOS,
					    desc->goa_clr_start_pos[i]);
		cmd_set_goa[1] |= FIELD_PREP(HX8279_P3_GOA_CLR_CFG_POLARITY,
					     desc->goa_clr_polarity[i]);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	if (desc->goa_unk_e4) {
		cmd_set_goa[0] = HX8279_P3_REG_UNKNOWN_E4;
		cmd_set_goa[1] = desc->goa_unk_e4;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
					     ARRAY_SIZE(cmd_set_goa));
	}

	cmd_set_goa[0] = HX8279_P3_REG_UNKNOWN_E5;
	cmd_set_goa[1] = desc->goa_unk_e5;
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_goa,
				     ARRAY_SIZE(cmd_set_goa));
}

static void hx8279_set_mipi_cfg(struct hx8279 *hx,
				struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	u8 cmd_set_mipi[2];

	if (hx->skip_mipi_timing)
		return;

	hx8279_set_page(hx, dsi_ctx, 5);

	if (desc->bta_tlpx || desc->ths_settle_time || desc->lhs_settle_time_by_osc25) {
		cmd_set_mipi[0] = HX8279_P5_REG_TIMING;
		cmd_set_mipi[1] = FIELD_PREP(HX8279_P5_TIMING_TLPX, desc->bta_tlpx);
		cmd_set_mipi[1] |= FIELD_PREP(HX8279_P5_TIMING_THS_SETTLE,
					      desc->ths_settle_time);
		cmd_set_mipi[1] |= FIELD_PREP(HX8279_P5_TIMING_LHS_SETTLE,
					      desc->lhs_settle_time_by_osc25);
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_mipi,
					     ARRAY_SIZE(cmd_set_mipi));
	}

	if (desc->timing_unk_b8) {
		cmd_set_mipi[0] = HX8279_P5_REG_UNKNOWN_B8;
		cmd_set_mipi[1] = desc->timing_unk_b8;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_mipi,
					     ARRAY_SIZE(cmd_set_mipi));
	}

	if (desc->timing_unk_bc) {
		cmd_set_mipi[0] = HX8279_P5_REG_UNKNOWN_BC;
		cmd_set_mipi[1] = desc->timing_unk_bc;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_mipi,
					     ARRAY_SIZE(cmd_set_mipi));
	}

	if (desc->timing_unk_d6) {
		cmd_set_mipi[0] = HX8279_P5_REG_UNKNOWN_D6;
		cmd_set_mipi[1] = desc->timing_unk_d6;
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_mipi,
					     ARRAY_SIZE(cmd_set_mipi));
	}
}

static void hx8279_set_adv_cfg(struct hx8279 *hx,
			       struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	const u8 cmd_set_dly[] = { HX8279_P6_REG_DLY_TIME_ADJ, desc->src_delay_time_adj_ck };
	const u8 cmd_set_gamma[] = { HX8279_P6_REG_GAMMA_CHOPPER, desc->gamma_ctl };
	const u8 cmd_set_volt_adj[] = { HX8279_P6_REG_VOLT_ADJ, desc->volt_adj };
	u8 cmd_set_eng[] = { HX8279_P6_REG_ENGINEER_PWD, HX8279_P6_ENG_UNLOCK_WORD };

	if (!desc->gamma_ctl && !desc->src_delay_time_adj_ck && !desc->volt_adj)
		return;

	hx8279_set_page(hx, dsi_ctx, 6);

	/* Unlock ENG settings: write same word to both ENGINEER_PWD and INHOUSE_FUNC */
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_eng, ARRAY_SIZE(cmd_set_eng));

	cmd_set_eng[0] = HX8279_P6_REG_INHOUSE_FUNC;
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_eng, ARRAY_SIZE(cmd_set_eng));

	/* Set Gamma Chopper and Gamma buffer Chopper control */
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_gamma, ARRAY_SIZE(cmd_set_gamma));

	/* Set Source delay time adjustment (CKV falling to Source off) */
	if (desc->src_delay_time_adj_ck)
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_dly,
					     ARRAY_SIZE(cmd_set_dly));

	/* Set voltage adjustment */
	if (desc->volt_adj)
		mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_volt_adj,
					     ARRAY_SIZE(cmd_set_volt_adj));

	/* Lock ENG settings again */
	cmd_set_eng[0] = HX8279_P6_REG_ENGINEER_PWD;
	cmd_set_eng[1] = 0;
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_eng, ARRAY_SIZE(cmd_set_eng));

	cmd_set_eng[0] = HX8279_P6_REG_INHOUSE_FUNC;
	mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_eng, ARRAY_SIZE(cmd_set_eng));
}

static void hx8279_set_digital_gamma(struct hx8279 *hx,
				     struct mipi_dsi_multi_context *dsi_ctx)
{
	const struct hx8279_digital_gamma *dgamma = hx->desc->dgamma;
	u8 cmd_set_dig_gamma[2];
	int i;

	if (!dgamma)
		return;

	/*
	 * Pages 7..9 are for RGB Positive, 10..12 are for RGB Negative:
	 * The first iteration sets all positive component registers,
	 * the second one sets all negatives.
	 */
	for (i = 0; i < 2; i++) {
		u8 pg_neg = i * 3;

		hx8279_set_page(hx, dsi_ctx, 7 + pg_neg);

		for (i = 0; i < ARRAY_SIZE(dgamma->r); i++) {
			cmd_set_dig_gamma[0] = HX8279_PG_DIGITAL_GAMMA + i;
			cmd_set_dig_gamma[1] = dgamma->r[i];
			mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_dig_gamma,
						     ARRAY_SIZE(cmd_set_dig_gamma));
		}

		hx8279_set_page(hx, dsi_ctx, 8 + pg_neg);

		for (i = 0; i < ARRAY_SIZE(dgamma->g); i++) {
			cmd_set_dig_gamma[0] = HX8279_PG_DIGITAL_GAMMA + i;
			cmd_set_dig_gamma[1] = dgamma->g[i];
			mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_dig_gamma,
						     ARRAY_SIZE(cmd_set_dig_gamma));
		}

		hx8279_set_page(hx, dsi_ctx, 9 + pg_neg);

		for (i = 0; i < ARRAY_SIZE(dgamma->b); i++) {
			cmd_set_dig_gamma[0] = HX8279_PG_DIGITAL_GAMMA + i;
			cmd_set_dig_gamma[1] = dgamma->b[i];
			mipi_dsi_generic_write_multi(dsi_ctx, cmd_set_dig_gamma,
						     ARRAY_SIZE(cmd_set_dig_gamma));
		}
	}
}

static int hx8279_on(struct hx8279 *hx)
{
	struct mipi_dsi_device *dsi = hx->dsi[0];
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	/* Page 5 */
	hx8279_set_mipi_cfg(hx, &dsi_ctx);

	/* Page 1 */
	hx8279_set_gmux(hx, &dsi_ctx);

	/* Page 2 */
	hx8279_set_analog_gamma(hx, &dsi_ctx);

	/* Page 3 */
	hx8279_set_goa_cfg(hx, &dsi_ctx);
	hx8279_set_goa_timing(hx, &dsi_ctx);

	/* Page 0 - Driver/Module Configuration */
	hx8279_set_module_config(hx, &dsi_ctx);

	/* Page 6 */
	hx8279_set_adv_cfg(hx, &dsi_ctx);

	/* Pages 7..12 */
	hx8279_set_digital_gamma(hx, &dsi_ctx);

	return dsi_ctx.accum_err;
}

static void hx8279_power_off(struct hx8279 *hx)
{
	gpiod_set_value_cansleep(hx->reset_gpio, 0);
	usleep_range(100, 500);
	gpiod_set_value_cansleep(hx->enable_gpio, 0);
	regulator_bulk_disable(ARRAY_SIZE(hx->vregs), hx->vregs);
}

static int hx8279_disable(struct drm_panel *panel)
{
	struct hx8279 *hx = to_hx8279(panel);
	struct mipi_dsi_device *dsi = hx->dsi[0];
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);

	return 0;
}

static int hx8279_enable(struct drm_panel *panel)
{
	struct hx8279 *hx = to_hx8279(panel);
	struct mipi_dsi_device *dsi = hx->dsi[0];
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);

	return 0;
}

static int hx8279_prepare(struct drm_panel *panel)
{
	struct hx8279 *hx = to_hx8279(panel);
	struct mipi_dsi_device *dsi = hx->dsi[0];
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(hx->vregs), hx->vregs);
	if (ret)
		return ret;

	gpiod_set_value_cansleep(hx->enable_gpio, 1);
	usleep_range(5000, 6000);
	gpiod_set_value_cansleep(hx->reset_gpio, 1);
	usleep_range(6000, 7000);

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
	if (hx->dsi[1])
		hx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;

	ret = hx8279_on(hx);
	if (ret) {
		hx8279_power_off(hx);
		return ret;
	}

	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 130);

	return dsi_ctx.accum_err;
}

static int hx8279_unprepare(struct drm_panel *panel)
{
	struct hx8279 *hx = to_hx8279(panel);
	struct mipi_dsi_device *dsi = hx->dsi[0];
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 130);

	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
	if (hx->dsi[1])
		hx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;

	hx8279_power_off(hx);

	return dsi_ctx.accum_err;
}

static int hx8279_get_modes(struct drm_panel *panel, struct drm_connector *connector)
{
	struct hx8279 *hx = to_hx8279(panel);
	int i;

	for (i = 0; i < hx->desc->num_modes; i++) {
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(connector->dev, &hx->desc->mode_data[i].mode);
		if (!mode)
			return -ENOMEM;

		drm_mode_set_name(mode);

		mode->type |= DRM_MODE_TYPE_DRIVER;
		if (hx->desc->num_modes == 1)
			mode->type |= DRM_MODE_TYPE_PREFERRED;

		drm_mode_probed_add(connector, mode);
	}

	connector->display_info.bpc = hx->desc->mode_data[0].bpc;
	connector->display_info.height_mm = hx->desc->mode_data[0].mode.height_mm;
	connector->display_info.width_mm = hx->desc->mode_data[0].mode.width_mm;

	return hx->desc->num_modes;
}

static const struct drm_panel_funcs hx8279_panel_funcs = {
	.disable = hx8279_disable,
	.unprepare = hx8279_unprepare,
	.prepare = hx8279_prepare,
	.enable = hx8279_enable,
	.get_modes = hx8279_get_modes,
};

static int hx8279_init_vregs(struct hx8279 *hx, struct device *dev)
{
	int ret;

	hx->vregs[0].supply = "vdd";
	hx->vregs[1].supply = "iovcc";
	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hx->vregs),
				      hx->vregs);
	if (ret < 0)
		return ret;

	ret = regulator_is_supported_voltage(hx->vregs[0].consumer,
					     3000000, 5000000);
	if (!ret)
		return -EINVAL;

	ret = regulator_is_supported_voltage(hx->vregs[1].consumer,
					     1700000, 1900000);
	if (!ret)
		return -EINVAL;

	return 0;
}

static int hx8279_check_gmux_config(struct hx8279 *hx, struct device *dev)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	const struct hx8279_goa_mux *gmux = desc->gmux;
	int i;

	/* No gmux defined means we simply skip the GOA mux configuration */
	if (!gmux)
		return 0;

	for (i = 0; i < ARRAY_SIZE(gmux->gout_l); i++) {
		if (gmux->gout_l[i] > (HX8279_GOUT_STB | HX8279_GOUT_SEL))
			return dev_err_probe(dev, -EINVAL,
					     "Invalid value found in gout_l[%d]\n", i);
	}

	for (i = 0; i < ARRAY_SIZE(gmux->gout_r); i++) {
		if (gmux->gout_r[i] > (HX8279_GOUT_STB | HX8279_GOUT_SEL))
			return dev_err_probe(dev, -EINVAL,
					     "Invalid value found in gout_r[%d]\n", i);
	}

	return 0;
}

static int hx8279_check_goa_config(struct hx8279 *hx, struct device *dev)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	bool goa_odd_valid, goa_even_valid;
	int i, num_zero, num_clr = 0;

	/* Up to 4 zero values is a valid configuration. Check them all. */
	num_zero = 1;
	for (i = 0; i < ARRAY_SIZE(desc->goa_odd_timing); i++) {
		if (desc->goa_odd_timing[i])
			num_zero++;
	}

	goa_odd_valid = (num_zero != ARRAY_SIZE(desc->goa_odd_timing));

	/* Up to 3 zeroes is a valid config. Check them all. */
	num_zero = 1;
	for (i = 0; i < ARRAY_SIZE(desc->goa_even_timing); i++) {
		if (desc->goa_even_timing[i])
			num_zero++;
	}

	goa_even_valid = (num_zero != ARRAY_SIZE(desc->goa_even_timing));

	/* Programming one without the other would make no sense! */
	if (goa_odd_valid != goa_even_valid)
		return -EINVAL;

	/* We know that both are either true or false now, check just one */
	if (!goa_odd_valid)
		hx->skip_goa_timing = true;

	if (!desc->goa_unk_ba && !desc->goa_stv_lead_time_ck &&
	    !desc->goa_ckv_lead_time_ck && !desc->goa_ckv_dummy_vblank_num &&
	    !desc->goa_ckv_rise_precharge && !desc->goa_ckv_fall_precharge &&
	    !desc->goa_clr1_width_adj && !desc->goa_clr234_width_adj &&
	    !desc->goa_unk_e4 && !desc->goa_unk_e5) {
		hx->skip_goa_config = true;
		return 0;
	}

	if ((desc->goa_stv_lead_time_ck > HX8279_P3_GOA_STV_LEAD) ||
	    (desc->goa_ckv_lead_time_ck > HX8279_P3_GOA_CKV_LEAD) ||
	    (desc->goa_ckv_dummy_vblank_num > HX8279_P3_GOA_CKV_DUMMY))
		return dev_err_probe(dev, -EINVAL,
				     "Invalid lead timings in GOA config\n");

	/*
	 * Don't perform zero check for polarity and start position, as
	 * both pol=0 and start=0 are valid configuration values.
	 */
	for (i = 0; i < ARRAY_SIZE(desc->goa_clr_start_pos); i++) {
		if (desc->goa_clr_start_pos[i] < 0)
			continue;
		else if (desc->goa_clr_start_pos[i] > HX8279_P3_GOA_CLR_CFG_STARTPOS)
			return dev_err_probe(dev, -EINVAL,
					     "Invalid start position for CLR%d\n", i + 1);
		else
			num_clr++;
	}
	if (!num_clr)
		return -EINVAL;

	for (i = 0; i < ARRAY_SIZE(desc->goa_clr_polarity); i++) {
		if (num_clr < 0)
			return -EINVAL;

		if (desc->goa_clr_polarity[i] < 0)
			continue;
		else if (desc->goa_clr_polarity[i] > 1)
			return dev_err_probe(dev, -EINVAL,
					     "Invalid polarity for CLR%d\n", i + 1);
		else
			num_clr--;
	}

	return 0;
}

static int hx8279_check_dig_gamma(struct hx8279 *hx, struct device *dev, const u8 *component)
{
	u8 gamma_high_bits[4];
	u16 prev_val = 0;
	int i, j, k, x;

	/*
	 * The gamma values are 10 bits long and shall be incremental
	 * to form a digital gamma correction reference curve.
	 *
	 * As for the registers format: the first 24 bytes contain each the
	 * lowest 8 bits for each of the gamma level references, and the last
	 * 6 bytes contain the high two bits of 4 registers at a time, where
	 * the first two bits are relative to the last register, and the last
	 * two are relative to the first register.
	 *
	 * Another way of saying, those are the first four LOW values:
	 * DGMA1_LO = 0xb1, DGMA2_LO = 0xb2, DGMA3_LO = 0xb3, DGMA4_LO = 0xb4
	 *
	 * The high values for those four are at DGMA1_4_HI = 0xc9;
	 * ...and DGMA1_4_HI's data contains the following bits:
	 * [1:0] = DGMA4_HI, [3:2] = DGMA3_HI, [5:4] = DGMA2_HI, [7:6] = DGMA1_HI
	 */
	for (i = 0; i < HX8279_PG_DGAMMA_NUM_HI_BYTES; i++) {
		k = HX8279_PG_DGAMMA_NUM_LO_BYTES + i;
		j = i * 4;
		x = 0;

		gamma_high_bits[0] = FIELD_GET(HX8279_DGAMMA_DGMA1_HI, component[k]);
		gamma_high_bits[1] = FIELD_GET(HX8279_DGAMMA_DGMA2_HI, component[k]);
		gamma_high_bits[2] = FIELD_GET(HX8279_DGAMMA_DGMA3_HI, component[k]);
		gamma_high_bits[3] = FIELD_GET(HX8279_DGAMMA_DGMA4_HI, component[k]);

		do {
			u16 cur_val = component[j] | (gamma_high_bits[x] << 8);

			if (cur_val < prev_val)
				return dev_err_probe(dev, -EINVAL,
						     "Invalid dgamma values: %u < %u!\n",
						     cur_val, prev_val);
			prev_val = cur_val;
			j++;
			x++;
		} while (x < 4);
	};

	return 0;
}

static int hx8279_check_params(struct hx8279 *hx, struct device *dev)
{
	const struct hx8279_panel_desc *desc = hx->desc;
	int ret;

	/* Voltages config validation */
	if (!desc->vgh_mv && !desc->vgl_mv && !desc->vgph_mv && !desc->vgnh_mv)
		hx->skip_voltage_config = true;
	else if ((desc->vgh_mv && desc->vgh_mv < HX8279_VGH_MIN_MV) ||
		 (desc->vgl_mv && desc->vgl_mv < HX8279_VGL_MIN_MV) ||
		 (desc->vgph_mv && desc->vgph_mv < HX8279_VGPNH_MIN_MV) ||
		 (desc->vgnh_mv && desc->vgnh_mv < HX8279_VGPNH_MIN_MV))
		return -EINVAL;

	/* GOA Muxing validation */
	ret = hx8279_check_gmux_config(hx, dev);
	if (ret)
		return ret;

	/* GOA Configuration validation */
	ret = hx8279_check_goa_config(hx, dev);
	if (ret)
		return ret;

	/* MIPI Configuration validation */
	if (!desc->bta_tlpx && !desc->lhs_settle_time_by_osc25 &&
	    !desc->ths_settle_time && !desc->timing_unk_b8 &&
	    !desc->timing_unk_bc && !desc->timing_unk_d6)
		hx->skip_mipi_timing = true;

	/* ENG/Gamma Configuration validation */
	if (desc->gamma_ctl > (HX8279_P6_GAMMA_POCGM_CTL | HX8279_P6_GAMMA_POGCMD_CTL))
		return -EINVAL;

	/* Digital Gamma values validation */
	if (desc->dgamma) {
		ret = hx8279_check_dig_gamma(hx, dev, desc->dgamma->r);
		if (ret)
			return ret;

		ret = hx8279_check_dig_gamma(hx, dev, desc->dgamma->g);
		if (ret)
			return ret;

		ret = hx8279_check_dig_gamma(hx, dev, desc->dgamma->b);
		if (ret)
			return ret;
	}

	return 0;
}

static int hx8279_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct device_node *dsi_r;
	struct hx8279 *hx;
	int i, ret;

	hx = devm_drm_panel_alloc(dev, struct hx8279, panel,
				  &hx8279_panel_funcs, DRM_MODE_CONNECTOR_DSI);
	if (IS_ERR(hx))
		return PTR_ERR(hx);

	ret = hx8279_init_vregs(hx, dev);
	if (ret)
		return ret;

	hx->desc = device_get_match_data(dev);
	if (!hx->desc)
		return -ENODEV;

	/*
	 * In some DriverICs some or all fields may be OTP: perform a
	 * basic configuration check before writing to help avoiding
	 * irreparable mistakes.
	 *
	 * Please note that this is not perfect and will only check if
	 * the values may be plausible; values that are wrong for a
	 * specific display, but still plausible for DrIC config will
	 * be accepted.
	 */
	ret = hx8279_check_params(hx, dev);
	if (ret)
		return dev_err_probe(dev, ret, "Invalid DriverIC configuration\n");

	/* The enable line may be always tied to VCCIO, so this is optional */
	hx->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_ASIS);
	if (IS_ERR(hx->enable_gpio))
		return dev_err_probe(dev, PTR_ERR(hx->enable_gpio),
				     "Failed to get enable GPIO\n");

	hx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_ASIS);
	if (IS_ERR(hx->reset_gpio))
		return dev_err_probe(dev, PTR_ERR(hx->reset_gpio),
				     "Failed to get reset GPIO\n");

	/* If the panel is connected on two DSIs then DSI0 left, DSI1 right */
	dsi_r = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
	if (dsi_r) {
		const struct mipi_dsi_device_info *info = &hx->desc->dsi_info;
		struct mipi_dsi_host *dsi_r_host;

		dsi_r_host = of_find_mipi_dsi_host_by_node(dsi_r);
		of_node_put(dsi_r);
		if (!dsi_r_host)
			return dev_err_probe(dev, -EPROBE_DEFER,
					     "Cannot get secondary DSI host\n");

		hx->dsi[1] = devm_mipi_dsi_device_register_full(dev, dsi_r_host, info);
		if (IS_ERR(hx->dsi[1]))
			return dev_err_probe(dev, PTR_ERR(hx->dsi[1]),
					     "Cannot get secondary DSI node\n");
		mipi_dsi_set_drvdata(hx->dsi[1], hx);
	}

	hx->dsi[0] = dsi;
	mipi_dsi_set_drvdata(dsi, hx);

	ret = drm_panel_of_backlight(&hx->panel);
	if (ret)
		return dev_err_probe(dev, ret, "Failed to get backlight\n");

	drm_panel_add(&hx->panel);

	for (i = 0; i < 2; i++) {
		if (!hx->dsi[i])
			continue;

		hx->dsi[i]->lanes = hx->desc->num_lanes;
		hx->dsi[i]->format = MIPI_DSI_FMT_RGB888;

		hx->dsi[i]->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
					 MIPI_DSI_MODE_LPM;

		if (hx->desc->mode_data[0].is_video_mode)
			hx->dsi[i]->mode_flags |= MIPI_DSI_MODE_VIDEO |
						  MIPI_DSI_MODE_VIDEO_SYNC_PULSE;

		ret = devm_mipi_dsi_attach(dev, hx->dsi[i]);
		if (ret < 0) {
			drm_panel_remove(&hx->panel);
			return dev_err_probe(dev, ret,
					     "Cannot attach to DSI%d host.\n", i);
		}
	}

	return 0;
}

static void hx8279_remove(struct mipi_dsi_device *dsi)
{
	struct hx8279 *hx = mipi_dsi_get_drvdata(dsi);

	drm_panel_remove(&hx->panel);
}

static const struct hx8279_panel_mode aoly_sl101pm1794fog_v15_modes[] = {
	{
		.mode = {
			.clock = 159420,
			.hdisplay = 1200,
			.hsync_start = 1200 + 80,
			.hsync_end = 1200 + 80 + 60,
			.htotal = 1200 + 80 + 60 + 24,
			.vdisplay = 1920,
			.vsync_start = 1920 + 10,
			.vsync_end = 1920 + 10 + 14,
			.vtotal = 1920 + 10 + 14 + 4,
			.width_mm = 136,
			.height_mm = 217,
			.type = DRM_MODE_TYPE_DRIVER
		},
		.bpc = 8,
		.is_video_mode = true,
	},
};

static const struct hx8279_panel_mode startek_kd070fhfid078_modes[] = {
	{
		.mode = {
			.clock = 156458,
			.hdisplay = 1200,
			.hsync_start = 1200 + 50,
			.hsync_end = 1200 + 50 + 24,
			.htotal = 1200 + 50 + 24 + 66,
			.vdisplay = 1920,
			.vsync_start = 1920 + 14,
			.vsync_end = 1920 + 14 + 2,
			.vtotal = 1920 + 14 + 2 + 10,
			.width_mm = 95,
			.height_mm = 151,
			.type = DRM_MODE_TYPE_DRIVER
		},
		.bpc = 8,
		.is_video_mode = true,
	},
};

static const struct hx8279_goa_mux aoly_sl101pm1794fog_v15_gmux = {
	.gout_l = { 0x5, 0x5, 0xb, 0xb, 0x9, 0x9, 0x16, 0x16, 0xe, 0xe,
		    0x7, 0x7, 0x26, 0x26, 0x15, 0x15, 0x1, 0x1, 0x3, 0x3 },
	.gout_r = { 0x6, 0x6, 0xc, 0xc, 0xa, 0xa, 0x16, 0x16, 0xe, 0xe,
		    0x8, 0x8, 0x26, 0x26, 0x15, 0x15, 0x2, 0x2, 0x4, 0x4 },
};

static const struct hx8279_analog_gamma aoly_sl101pm1794fog_v15_ana_gamma = {
	.pos = { 0x0, 0xd, 0x17, 0x26, 0x31, 0x1c, 0x2c, 0x33, 0x31,
		 0x37, 0x37, 0x37, 0x39, 0x2e, 0x2f, 0x2f, 0x7 },
	.neg = { 0x0, 0xd, 0x17, 0x26, 0x31, 0x3f, 0x3f, 0x3f, 0x3f,
		 0x37, 0x37, 0x37, 0x39, 0x2e, 0x2f, 0x2f, 0x7 },
};

static const struct hx8279_digital_gamma aoly_sl101pm1794fog_v15_dig_gamma = {
	.r = { 0x0, 0x5, 0x10, 0x22, 0x36, 0x4a, 0x6c, 0x9a, 0xd7, 0x17,
	       0x92, 0x15, 0x18, 0x8c, 0x0, 0x3a, 0x72, 0x8c, 0xa5, 0xb1,
	       0xbe, 0xca, 0xd1, 0xd4, 0x0, 0x0, 0x16, 0xaf, 0xff, 0xff },
	.g = { 0x4, 0x5, 0x11, 0x24, 0x39, 0x4e, 0x72, 0xa3, 0xe1, 0x25,
	       0xa8, 0x2e, 0x32, 0xad, 0x28, 0x63, 0x9b, 0xb5, 0xcf, 0xdb,
	       0xe8, 0xf5, 0xfa, 0xfc, 0x0, 0x0, 0x16, 0xaf, 0xff, 0xff },
	.b = { 0x4, 0x4, 0xf, 0x22, 0x37, 0x4d, 0x71, 0xa2, 0xe1, 0x26,
	       0xa9, 0x2f, 0x33, 0xac, 0x24, 0x5d, 0x94, 0xac, 0xc5, 0xd1,
	       0xdc, 0xe8, 0xed, 0xf0, 0x0, 0x0, 0x16, 0xaf, 0xff, 0xff },
};

static const struct hx8279_panel_desc aoly_sl101pm1794fog_v15 = {
	.dsi_info = {
		.type = "L101PM1794FOG-V15",
		.channel = 0,
		.node = NULL,
	},
	.mode_data = aoly_sl101pm1794fog_v15_modes,
	.num_modes = ARRAY_SIZE(aoly_sl101pm1794fog_v15_modes),
	.num_lanes = 4,

	/* Driver/Module Configuration: LC Matrix voltages */
	.vgh_mv = 16500,
	.vgl_mv = 11200,
	.vgph_mv = 4600,
	.vgnh_mv = 4600,

	/* Analog Gamma correction */
	.agamma = &aoly_sl101pm1794fog_v15_ana_gamma,

	/* Gate driver On Array (GOA) Muxing */
	.gmux = &aoly_sl101pm1794fog_v15_gmux,

	/* Gate driver On Array (GOA) Mux Config */
	.goa_unk_ba = 0xf0,
	.goa_odd_timing = { 0, 0, 0, 42, 0, 0 },
	.goa_even_timing = { 1, 42, 0, 0 },
	.goa_stv_lead_time_ck = 11,
	.goa_ckv_lead_time_ck = 7,
	.goa_ckv_dummy_vblank_num = 3,
	.goa_ckv_rise_precharge = 1,
	.goa_clr1_width_adj = 0,
	.goa_clr234_width_adj = 0,
	.goa_clr_polarity = { 1, 0, 0, 0 },
	.goa_clr_start_pos = { 8, 9, 3, 4 },
	.goa_unk_e4 = 0xc0,
	.goa_unk_e5 = 0x0d,

	/* MIPI Configuration */
	.bta_tlpx = 2,
	.lhs_settle_time_by_osc25 = true,
	.ths_settle_time = 2,
	.timing_unk_b8 = 0xa5,
	.timing_unk_bc = 0x20,
	.timing_unk_d6 = 0x7f,

	/* ENG/Gamma Configuration */
	.gamma_ctl = 0,
	.volt_adj = FIELD_PREP_CONST(HX8279_P6_VOLT_ADJ_VCCIFS, 3) |
		    FIELD_PREP_CONST(HX8279_P6_VOLT_ADJ_VCCS, 3),
	.src_delay_time_adj_ck = 50,

	/* Digital Gamma Adjustment */
	.dgamma = &aoly_sl101pm1794fog_v15_dig_gamma,
};

static const struct hx8279_goa_mux startek_kd070fhfid078_gmux = {
	.gout_l = { 0xd, 0xd, 0x6, 0x6, 0x8, 0x8, 0xa, 0xa, 0xc, 0xc,
		    0x0, 0x0, 0xe, 0xe, 0x1, 0x1, 0x4, 0x4, 0x0, 0x0 },
	.gout_r = { 0xd, 0xd, 0x5, 0x5, 0x7, 0x7, 0x9, 0x9, 0xb, 0xb,
		    0x0, 0x0, 0xe, 0xe, 0x1, 0x1, 0x3, 0x3, 0x0, 0x0 },
};

static const struct hx8279_panel_desc startek_kd070fhfid078 = {
	.dsi_info = {
		.type = "KD070FHFID078",
		.channel = 0,
		.node = NULL,
	},
	.mode_data = startek_kd070fhfid078_modes,
	.num_modes = ARRAY_SIZE(startek_kd070fhfid078_modes),
	.num_lanes = 4,

	/* Driver/Module Configuration: LC Matrix voltages */
	.vgh_mv = 18000,
	.vgl_mv = 12100,
	.vgph_mv = 5500,
	.vgnh_mv = 5500,

	/* Gate driver On Array (GOA) Mux Config */
	.gmux = &startek_kd070fhfid078_gmux,

	/* Gate driver On Array (GOA) Configuration */
	.goa_unk_ba = 0xf0,
	.goa_stv_lead_time_ck = 7,
	.goa_ckv_lead_time_ck = 3,
	.goa_ckv_dummy_vblank_num = 1,
	.goa_ckv_rise_precharge = 0,
	.goa_ckv_fall_precharge = 0,
	.goa_clr1_width_adj = 1,
	.goa_clr234_width_adj = 5,
	.goa_clr_polarity = { 0, 1, -1, -1 },
	.goa_clr_start_pos = { 5, 10, -1, -1 },
	.goa_unk_e4 = 0xc0,
	.goa_unk_e5 = 0x00,

	/* MIPI Configuration */
	.bta_tlpx = 2,
	.lhs_settle_time_by_osc25 = true,
	.ths_settle_time = 2,
	.timing_unk_b8 = 0x7f,
	.timing_unk_bc = 0x20,
	.timing_unk_d6 = 0x7f,

	/* ENG/Gamma Configuration */
	.gamma_ctl = FIELD_PREP_CONST(HX8279_P6_GAMMA_POCGM_CTL, 1) |
		     FIELD_PREP_CONST(HX8279_P6_GAMMA_POGCMD_CTL, 1),
	.src_delay_time_adj_ck = 72,
};

static const struct of_device_id hx8279_of_match[] = {
	{ .compatible = "aoly,sl101pm1794fog-v15", .data = &aoly_sl101pm1794fog_v15 },
	{ .compatible = "startek,kd070fhfid078", .data = &startek_kd070fhfid078 },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, hx8279_of_match);

static struct mipi_dsi_driver hx8279_driver = {
	.probe = hx8279_probe,
	.remove = hx8279_remove,
	.driver = {
		.name = "panel-himax-hx8279",
		.of_match_table = hx8279_of_match,
	},
};
module_mipi_dsi_driver(hx8279_driver);

MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
MODULE_DESCRIPTION("Himax HX8279 DriverIC panels driver");
MODULE_LICENSE("GPL");