drm/panel: ilitek-ili9881c: support Waveshare 7.0" DSI panel

Enable support for Waveshare 7.0" DSI TOUCH-A panel. It requires
additional voltage regulator, iovcc.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260418-waveshare-dsi-touch-v4-2-b249f3e702bd@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2026-04-18 02:16:21 +03:00
parent 7ae674a399
commit 4c95b2b7d4

View File

@ -52,6 +52,7 @@ struct ili9881c {
const struct ili9881c_desc *desc; const struct ili9881c_desc *desc;
struct regulator *power; struct regulator *power;
struct regulator *iovcc;
struct gpio_desc *reset; struct gpio_desc *reset;
enum drm_panel_orientation orientation; enum drm_panel_orientation orientation;
@ -1997,6 +1998,205 @@ static const struct ili9881c_instr bsd1218_a101kl68_init[] = {
ILI9881C_COMMAND_INSTR(0xd3, 0x3f), ILI9881C_COMMAND_INSTR(0xd3, 0x3f),
}; };
static const struct ili9881c_instr waveshare_7inch_a_init[] = {
ILI9881C_SWITCH_PAGE_INSTR(3),
ILI9881C_COMMAND_INSTR(0x01, 0x00),
ILI9881C_COMMAND_INSTR(0x02, 0x00),
ILI9881C_COMMAND_INSTR(0x03, 0x73),
ILI9881C_COMMAND_INSTR(0x04, 0x00),
ILI9881C_COMMAND_INSTR(0x05, 0x00),
ILI9881C_COMMAND_INSTR(0x06, 0x0a),
ILI9881C_COMMAND_INSTR(0x07, 0x00),
ILI9881C_COMMAND_INSTR(0x08, 0x00),
ILI9881C_COMMAND_INSTR(0x09, 0x61),
ILI9881C_COMMAND_INSTR(0x0a, 0x00),
ILI9881C_COMMAND_INSTR(0x0b, 0x00),
ILI9881C_COMMAND_INSTR(0x0c, 0x01),
ILI9881C_COMMAND_INSTR(0x0d, 0x00),
ILI9881C_COMMAND_INSTR(0x0e, 0x00),
ILI9881C_COMMAND_INSTR(0x0f, 0x61),
ILI9881C_COMMAND_INSTR(0x10, 0x61),
ILI9881C_COMMAND_INSTR(0x11, 0x00),
ILI9881C_COMMAND_INSTR(0x12, 0x00),
ILI9881C_COMMAND_INSTR(0x13, 0x00),
ILI9881C_COMMAND_INSTR(0x14, 0x00),
ILI9881C_COMMAND_INSTR(0x15, 0x00),
ILI9881C_COMMAND_INSTR(0x16, 0x00),
ILI9881C_COMMAND_INSTR(0x17, 0x00),
ILI9881C_COMMAND_INSTR(0x18, 0x00),
ILI9881C_COMMAND_INSTR(0x19, 0x00),
ILI9881C_COMMAND_INSTR(0x1a, 0x00),
ILI9881C_COMMAND_INSTR(0x1b, 0x00),
ILI9881C_COMMAND_INSTR(0x1c, 0x00),
ILI9881C_COMMAND_INSTR(0x1d, 0x00),
ILI9881C_COMMAND_INSTR(0x1e, 0x40),
ILI9881C_COMMAND_INSTR(0x1f, 0x80),
ILI9881C_COMMAND_INSTR(0x20, 0x06),
ILI9881C_COMMAND_INSTR(0x21, 0x01),
ILI9881C_COMMAND_INSTR(0x22, 0x00),
ILI9881C_COMMAND_INSTR(0x23, 0x00),
ILI9881C_COMMAND_INSTR(0x24, 0x00),
ILI9881C_COMMAND_INSTR(0x25, 0x00),
ILI9881C_COMMAND_INSTR(0x26, 0x00),
ILI9881C_COMMAND_INSTR(0x27, 0x00),
ILI9881C_COMMAND_INSTR(0x28, 0x33),
ILI9881C_COMMAND_INSTR(0x29, 0x03),
ILI9881C_COMMAND_INSTR(0x2a, 0x00),
ILI9881C_COMMAND_INSTR(0x2b, 0x00),
ILI9881C_COMMAND_INSTR(0x2c, 0x00),
ILI9881C_COMMAND_INSTR(0x2d, 0x00),
ILI9881C_COMMAND_INSTR(0x2e, 0x00),
ILI9881C_COMMAND_INSTR(0x2f, 0x00),
ILI9881C_COMMAND_INSTR(0x30, 0x00),
ILI9881C_COMMAND_INSTR(0x31, 0x00),
ILI9881C_COMMAND_INSTR(0x32, 0x00),
ILI9881C_COMMAND_INSTR(0x33, 0x00),
ILI9881C_COMMAND_INSTR(0x34, 0x04),
ILI9881C_COMMAND_INSTR(0x35, 0x00),
ILI9881C_COMMAND_INSTR(0x36, 0x00),
ILI9881C_COMMAND_INSTR(0x37, 0x00),
ILI9881C_COMMAND_INSTR(0x38, 0x3c),
ILI9881C_COMMAND_INSTR(0x39, 0x00),
ILI9881C_COMMAND_INSTR(0x3a, 0x00),
ILI9881C_COMMAND_INSTR(0x3b, 0x00),
ILI9881C_COMMAND_INSTR(0x3c, 0x00),
ILI9881C_COMMAND_INSTR(0x3d, 0x00),
ILI9881C_COMMAND_INSTR(0x3e, 0x00),
ILI9881C_COMMAND_INSTR(0x3f, 0x00),
ILI9881C_COMMAND_INSTR(0x40, 0x00),
ILI9881C_COMMAND_INSTR(0x41, 0x00),
ILI9881C_COMMAND_INSTR(0x42, 0x00),
ILI9881C_COMMAND_INSTR(0x43, 0x00),
ILI9881C_COMMAND_INSTR(0x44, 0x00),
ILI9881C_COMMAND_INSTR(0x50, 0x10),
ILI9881C_COMMAND_INSTR(0x51, 0x32),
ILI9881C_COMMAND_INSTR(0x52, 0x54),
ILI9881C_COMMAND_INSTR(0x53, 0x76),
ILI9881C_COMMAND_INSTR(0x54, 0x98),
ILI9881C_COMMAND_INSTR(0x55, 0xba),
ILI9881C_COMMAND_INSTR(0x56, 0x10),
ILI9881C_COMMAND_INSTR(0x57, 0x32),
ILI9881C_COMMAND_INSTR(0x58, 0x54),
ILI9881C_COMMAND_INSTR(0x59, 0x76),
ILI9881C_COMMAND_INSTR(0x5a, 0x98),
ILI9881C_COMMAND_INSTR(0x5b, 0xba),
ILI9881C_COMMAND_INSTR(0x5c, 0xdc),
ILI9881C_COMMAND_INSTR(0x5d, 0xfe),
ILI9881C_COMMAND_INSTR(0x5e, 0x00),
ILI9881C_COMMAND_INSTR(0x5f, 0x0e),
ILI9881C_COMMAND_INSTR(0x60, 0x0f),
ILI9881C_COMMAND_INSTR(0x61, 0x0c),
ILI9881C_COMMAND_INSTR(0x62, 0x0d),
ILI9881C_COMMAND_INSTR(0x63, 0x06),
ILI9881C_COMMAND_INSTR(0x64, 0x07),
ILI9881C_COMMAND_INSTR(0x65, 0x02),
ILI9881C_COMMAND_INSTR(0x66, 0x02),
ILI9881C_COMMAND_INSTR(0x67, 0x02),
ILI9881C_COMMAND_INSTR(0x68, 0x02),
ILI9881C_COMMAND_INSTR(0x69, 0x01),
ILI9881C_COMMAND_INSTR(0x6a, 0x00),
ILI9881C_COMMAND_INSTR(0x6b, 0x02),
ILI9881C_COMMAND_INSTR(0x6c, 0x15),
ILI9881C_COMMAND_INSTR(0x6d, 0x14),
ILI9881C_COMMAND_INSTR(0x6e, 0x02),
ILI9881C_COMMAND_INSTR(0x6f, 0x02),
ILI9881C_COMMAND_INSTR(0x70, 0x02),
ILI9881C_COMMAND_INSTR(0x71, 0x02),
ILI9881C_COMMAND_INSTR(0x72, 0x02),
ILI9881C_COMMAND_INSTR(0x73, 0x02),
ILI9881C_COMMAND_INSTR(0x74, 0x02),
ILI9881C_COMMAND_INSTR(0x75, 0x0e),
ILI9881C_COMMAND_INSTR(0x76, 0x0f),
ILI9881C_COMMAND_INSTR(0x77, 0x0c),
ILI9881C_COMMAND_INSTR(0x78, 0x0d),
ILI9881C_COMMAND_INSTR(0x79, 0x06),
ILI9881C_COMMAND_INSTR(0x7a, 0x07),
ILI9881C_COMMAND_INSTR(0x7b, 0x02),
ILI9881C_COMMAND_INSTR(0x7c, 0x02),
ILI9881C_COMMAND_INSTR(0x7d, 0x02),
ILI9881C_COMMAND_INSTR(0x7e, 0x02),
ILI9881C_COMMAND_INSTR(0x7f, 0x01),
ILI9881C_COMMAND_INSTR(0x80, 0x00),
ILI9881C_COMMAND_INSTR(0x81, 0x02),
ILI9881C_COMMAND_INSTR(0x82, 0x14),
ILI9881C_COMMAND_INSTR(0x83, 0x15),
ILI9881C_COMMAND_INSTR(0x84, 0x02),
ILI9881C_COMMAND_INSTR(0x85, 0x02),
ILI9881C_COMMAND_INSTR(0x86, 0x02),
ILI9881C_COMMAND_INSTR(0x87, 0x02),
ILI9881C_COMMAND_INSTR(0x88, 0x02),
ILI9881C_COMMAND_INSTR(0x89, 0x02),
ILI9881C_COMMAND_INSTR(0x8a, 0x02),
ILI9881C_SWITCH_PAGE_INSTR(4),
ILI9881C_COMMAND_INSTR(0x38, 0x01),
ILI9881C_COMMAND_INSTR(0x39, 0x00),
ILI9881C_COMMAND_INSTR(0x6c, 0x15),
ILI9881C_COMMAND_INSTR(0x6e, 0x2a),
ILI9881C_COMMAND_INSTR(0x6f, 0x33),
ILI9881C_COMMAND_INSTR(0x3a, 0x94),
ILI9881C_COMMAND_INSTR(0x8d, 0x14),
ILI9881C_COMMAND_INSTR(0x87, 0xba),
ILI9881C_COMMAND_INSTR(0x26, 0x76),
ILI9881C_COMMAND_INSTR(0xb2, 0xd1),
ILI9881C_COMMAND_INSTR(0xb5, 0x06),
ILI9881C_COMMAND_INSTR(0x3b, 0x98),
ILI9881C_SWITCH_PAGE_INSTR(1),
ILI9881C_COMMAND_INSTR(0x22, 0x0a),
ILI9881C_COMMAND_INSTR(0x31, 0x00),
ILI9881C_COMMAND_INSTR(0x53, 0x71),
ILI9881C_COMMAND_INSTR(0x55, 0x8f),
ILI9881C_COMMAND_INSTR(0x40, 0x33),
ILI9881C_COMMAND_INSTR(0x50, 0x96),
ILI9881C_COMMAND_INSTR(0x51, 0x96),
ILI9881C_COMMAND_INSTR(0x60, 0x23),
ILI9881C_COMMAND_INSTR(0xa0, 0x08),
ILI9881C_COMMAND_INSTR(0xa1, 0x1d),
ILI9881C_COMMAND_INSTR(0xa2, 0x2a),
ILI9881C_COMMAND_INSTR(0xa3, 0x10),
ILI9881C_COMMAND_INSTR(0xa4, 0x15),
ILI9881C_COMMAND_INSTR(0xa5, 0x28),
ILI9881C_COMMAND_INSTR(0xa6, 0x1c),
ILI9881C_COMMAND_INSTR(0xa7, 0x1d),
ILI9881C_COMMAND_INSTR(0xa8, 0x7e),
ILI9881C_COMMAND_INSTR(0xa9, 0x1d),
ILI9881C_COMMAND_INSTR(0xaa, 0x29),
ILI9881C_COMMAND_INSTR(0xab, 0x6b),
ILI9881C_COMMAND_INSTR(0xac, 0x1a),
ILI9881C_COMMAND_INSTR(0xad, 0x18),
ILI9881C_COMMAND_INSTR(0xae, 0x4b),
ILI9881C_COMMAND_INSTR(0xaf, 0x20),
ILI9881C_COMMAND_INSTR(0xb0, 0x27),
ILI9881C_COMMAND_INSTR(0xb1, 0x50),
ILI9881C_COMMAND_INSTR(0xb2, 0x64),
ILI9881C_COMMAND_INSTR(0xb3, 0x39),
ILI9881C_COMMAND_INSTR(0xc0, 0x08),
ILI9881C_COMMAND_INSTR(0xc1, 0x1d),
ILI9881C_COMMAND_INSTR(0xc2, 0x2a),
ILI9881C_COMMAND_INSTR(0xc3, 0x10),
ILI9881C_COMMAND_INSTR(0xc4, 0x15),
ILI9881C_COMMAND_INSTR(0xc5, 0x28),
ILI9881C_COMMAND_INSTR(0xc6, 0x1c),
ILI9881C_COMMAND_INSTR(0xc7, 0x1d),
ILI9881C_COMMAND_INSTR(0xc8, 0x7e),
ILI9881C_COMMAND_INSTR(0xc9, 0x1d),
ILI9881C_COMMAND_INSTR(0xca, 0x29),
ILI9881C_COMMAND_INSTR(0xcb, 0x6b),
ILI9881C_COMMAND_INSTR(0xcc, 0x1a),
ILI9881C_COMMAND_INSTR(0xcd, 0x18),
ILI9881C_COMMAND_INSTR(0xce, 0x4b),
ILI9881C_COMMAND_INSTR(0xcf, 0x20),
ILI9881C_COMMAND_INSTR(0xd0, 0x27),
ILI9881C_COMMAND_INSTR(0xd1, 0x50),
ILI9881C_COMMAND_INSTR(0xd2, 0x64),
ILI9881C_COMMAND_INSTR(0xd3, 0x39),
ILI9881C_SWITCH_PAGE_INSTR(0),
ILI9881C_COMMAND_INSTR(0x3a, 0x77),
ILI9881C_COMMAND_INSTR(0x36, 0x00),
};
static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel) static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
{ {
return container_of(panel, struct ili9881c, panel); return container_of(panel, struct ili9881c, panel);
@ -2035,9 +2235,19 @@ static int ili9881c_prepare(struct drm_panel *panel)
int ret; int ret;
/* Power the panel */ /* Power the panel */
if (ctx->iovcc) {
ret = regulator_enable(ctx->iovcc);
if (ret)
return ret;
}
msleep(5);
ret = regulator_enable(ctx->power); ret = regulator_enable(ctx->power);
if (ret) if (ret) {
return ret; mctx.accum_err = ret;
goto disable_iovcc;
}
msleep(5); msleep(5);
/* And reset it */ /* And reset it */
@ -2074,6 +2284,9 @@ static int ili9881c_prepare(struct drm_panel *panel)
disable_power: disable_power:
regulator_disable(ctx->power); regulator_disable(ctx->power);
disable_iovcc:
if (ctx->iovcc)
regulator_disable(ctx->iovcc);
return mctx.accum_err; return mctx.accum_err;
} }
@ -2085,6 +2298,8 @@ static int ili9881c_unprepare(struct drm_panel *panel)
mipi_dsi_dcs_set_display_off_multi(&mctx); mipi_dsi_dcs_set_display_off_multi(&mctx);
mipi_dsi_dcs_enter_sleep_mode_multi(&mctx); mipi_dsi_dcs_enter_sleep_mode_multi(&mctx);
regulator_disable(ctx->power); regulator_disable(ctx->power);
if (ctx->iovcc)
regulator_disable(ctx->iovcc);
gpiod_set_value_cansleep(ctx->reset, 1); gpiod_set_value_cansleep(ctx->reset, 1);
return 0; return 0;
@ -2260,6 +2475,23 @@ static const struct drm_display_mode bsd1218_a101kl68_default_mode = {
.height_mm = 170, .height_mm = 170,
}; };
static const struct drm_display_mode waveshare_7inch_a_mode = {
.clock = 83333,
.hdisplay = 720,
.hsync_start = 720 + 120,
.hsync_end = 720 + 120 + 100,
.htotal = 720 + 120 + 100 + 100,
.vdisplay = 1280,
.vsync_start = 1280 + 10,
.vsync_end = 1280 + 10 + 10,
.vtotal = 1280 + 10 + 10 + 10,
.width_mm = 85,
.height_mm = 154,
};
static int ili9881c_get_modes(struct drm_panel *panel, static int ili9881c_get_modes(struct drm_panel *panel,
struct drm_connector *connector) struct drm_connector *connector)
{ {
@ -2329,6 +2561,11 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->power), return dev_err_probe(&dsi->dev, PTR_ERR(ctx->power),
"Couldn't get our power regulator\n"); "Couldn't get our power regulator\n");
ctx->iovcc = devm_regulator_get_optional(&dsi->dev, "iovcc");
if (IS_ERR(ctx->iovcc))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->iovcc),
"Couldn't get our iovcc regulator\n");
ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_LOW); ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset)) if (IS_ERR(ctx->reset))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset), return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
@ -2454,6 +2691,15 @@ static const struct ili9881c_desc bsd1218_a101kl68_desc = {
.lanes = 4, .lanes = 4,
}; };
static const struct ili9881c_desc waveshare_7inch_a_desc = {
.init = waveshare_7inch_a_init,
.init_length = ARRAY_SIZE(waveshare_7inch_a_init),
.mode = &waveshare_7inch_a_mode,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_HSE |
MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS,
.lanes = 2,
};
static const struct of_device_id ili9881c_of_match[] = { static const struct of_device_id ili9881c_of_match[] = {
{ .compatible = "bananapi,lhr050h41", .data = &lhr050h41_desc }, { .compatible = "bananapi,lhr050h41", .data = &lhr050h41_desc },
{ .compatible = "bestar,bsd1218-a101kl68", .data = &bsd1218_a101kl68_desc }, { .compatible = "bestar,bsd1218-a101kl68", .data = &bsd1218_a101kl68_desc },
@ -2462,6 +2708,7 @@ static const struct of_device_id ili9881c_of_match[] = {
{ .compatible = "tdo,tl050hdv35", .data = &tl050hdv35_desc }, { .compatible = "tdo,tl050hdv35", .data = &tl050hdv35_desc },
{ .compatible = "wanchanglong,w552946aaa", .data = &w552946aaa_desc }, { .compatible = "wanchanglong,w552946aaa", .data = &w552946aaa_desc },
{ .compatible = "wanchanglong,w552946aba", .data = &w552946aba_desc }, { .compatible = "wanchanglong,w552946aba", .data = &w552946aba_desc },
{ .compatible = "waveshare,7.0-dsi-touch-a", .data = &waveshare_7inch_a_desc },
{ .compatible = "ampire,am8001280g", .data = &am8001280g_desc }, { .compatible = "ampire,am8001280g", .data = &am8001280g_desc },
{ .compatible = "raspberrypi,dsi-5inch", &rpi_5inch_desc }, { .compatible = "raspberrypi,dsi-5inch", &rpi_5inch_desc },
{ .compatible = "raspberrypi,dsi-7inch", &rpi_7inch_desc }, { .compatible = "raspberrypi,dsi-7inch", &rpi_7inch_desc },