[RFC 2/4] drm/panel/ili9341: Rebase and some more
Josef Luštický
josef at lusticky.cz
Tue Jul 30 06:45:37 UTC 2019
Hi Noralf,
see comment bellow.
po 29. 7. 2019 v 21:55 odesílatel Noralf Trønnes <noralf at tronnes.org> napsal:
>
> Embed mipi_dbi in struct ili9341.
> Rebase on moved mipi-dbi, rename variable name.
> Add backlight_device to panel struct.
> mipi_dbi_hw_reset() already has a NULL check on the reset gpio.
> Prepare for more panels by reworking ili9341_config.
>
> Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
> ---
> drivers/gpu/drm/panel/panel-ilitek-ili9341.c | 104 +++++++++----------
> 1 file changed, 52 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9341.c b/drivers/gpu/drm/panel/panel-ilitek-ili9341.c
> index 0c700b171025..a755f3e60111 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9341.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9341.c
> @@ -28,7 +28,7 @@
> #include <drm/drm_modes.h>
> #include <drm/drm_panel.h>
> #include <drm/drm_print.h>
> -#include <drm/tinydrm/mipi-dbi.h>
> +#include <drm/drm_mipi_dbi.h>
>
> /* ILI9341 extended register set (Vendor Command Set) */
> #define ILI9341_IFMODE 0xB0 // clock polarity
> @@ -42,17 +42,18 @@
>
> /**
> * struct ili9341_config - the display specific configuration
> - * @width_mm: physical panel width [mm]
> - * @height_mm: physical panel height [mm]
> + * @funcs: Panel functions
> + * @mode: Display mode
> */
> struct ili9341_config {
> - u32 width_mm;
> - u32 height_mm;
> + const struct drm_panel_funcs *funcs;
> + const struct drm_display_mode *mode;
> };
>
> struct ili9341 {
> struct drm_panel panel;
> - struct mipi_dbi *mipi;
> + struct mipi_dbi dbi;
> + struct backlight_device *backlight;
> const struct ili9341_config *conf;
> };
>
> @@ -63,47 +64,50 @@ static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel)
>
> static int ili9341_deinit(struct drm_panel *panel, struct ili9341 *ili)
> {
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SET_DISPLAY_OFF);
> - mipi_dbi_command(ili->mipi, MIPI_DCS_ENTER_SLEEP_MODE);
> + struct mipi_dbi *dbi = &ili->dbi;
> +
> + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
> + mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
> msleep(5);
> return 0;
> }
>
> -static int ili9341_init(struct drm_panel *panel, struct ili9341 *ili)
> +static int dt024ctft_init(struct drm_panel *panel, struct ili9341 *ili)
I'd prefer to name this function something like ili9341_prgb_init.
In the future, there may be more displays with ILI9341 chip and prgb support
apart from DisplayTech DT024CTFT.
> {
> - /* HW / SW Reset display and wait */
> - if (ili->mipi->reset)
> - mipi_dbi_hw_reset(ili->mipi);
> + struct mipi_dbi *dbi = &ili->dbi;
>
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SOFT_RESET);
> + /* HW / SW Reset display and wait */
> + mipi_dbi_hw_reset(dbi);
> +
> + mipi_dbi_command(dbi, MIPI_DCS_SOFT_RESET);
> msleep(120);
>
> /* Polarity */
> - mipi_dbi_command(ili->mipi, ILI9341_IFMODE, 0xC0);
> + mipi_dbi_command(dbi, ILI9341_IFMODE, 0xC0);
>
> /* Interface control */
> - mipi_dbi_command(ili->mipi, ILI9341_IFCTL, 0x09, 0x01, 0x26);
> + mipi_dbi_command(dbi, ILI9341_IFCTL, 0x09, 0x01, 0x26);
>
> /* Pixel format */
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_18BIT << 4);
> + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_18BIT << 4);
>
> /* Gamma */
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
> - mipi_dbi_command(ili->mipi, ILI9341_PGAMCTRL,
> + mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
> + mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
> 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
> 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
> - mipi_dbi_command(ili->mipi, ILI9341_NGAMCTRL,
> + mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
> 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
> 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
>
> /* Rotation */
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SET_ADDRESS_MODE, ILI9341_MADCTL_MX);
> + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, ILI9341_MADCTL_MX);
>
> /* Exit sleep mode */
> - mipi_dbi_command(ili->mipi, MIPI_DCS_EXIT_SLEEP_MODE);
> + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
> msleep(120);
>
> - mipi_dbi_command(ili->mipi, MIPI_DCS_SET_DISPLAY_ON);
> + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
>
> return 0;
> }
> @@ -115,12 +119,12 @@ static int ili9341_unprepare(struct drm_panel *panel)
> return ili9341_deinit(panel, ili);
> }
>
> -static int ili9341_prepare(struct drm_panel *panel)
> +static int dt024ctft_prepare(struct drm_panel *panel)
> {
> struct ili9341 *ili = panel_to_ili9341(panel);
> int ret;
>
> - ret = ili9341_init(panel, ili);
> + ret = dt024ctft_init(panel, ili);
> if (ret < 0)
> ili9341_unprepare(panel);
> return ret;
> @@ -130,14 +134,14 @@ static int ili9341_enable(struct drm_panel *panel)
> {
> struct ili9341 *ili = panel_to_ili9341(panel);
>
> - return backlight_enable(ili->mipi->backlight);
> + return backlight_enable(ili->backlight);
> }
>
> static int ili9341_disable(struct drm_panel *panel)
> {
> struct ili9341 *ili = panel_to_ili9341(panel);
>
> - return backlight_disable(ili->mipi->backlight);
> + return backlight_disable(ili->backlight);
> }
>
> static const struct drm_display_mode prgb_240x320_mode = {
> @@ -154,7 +158,10 @@ static const struct drm_display_mode prgb_240x320_mode = {
> .vtotal = 320 + 4 + 2 + 2,
>
> .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> - .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED
> + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
> +
> + .width_mm = 37,
> + .height_mm = 49,
> };
>
> static int ili9341_get_modes(struct drm_panel *panel)
> @@ -163,7 +170,7 @@ static int ili9341_get_modes(struct drm_panel *panel)
> struct ili9341 *ili = panel_to_ili9341(panel);
> struct drm_display_mode *mode;
>
> - mode = drm_mode_duplicate(panel->drm, &prgb_240x320_mode);
> + mode = drm_mode_duplicate(panel->drm, ili->conf->mode);
> if (!mode) {
> DRM_DEV_ERROR(panel->drm->dev, "bad mode or failed to add mode\n");
> return -ENOMEM;
> @@ -171,9 +178,6 @@ static int ili9341_get_modes(struct drm_panel *panel)
>
> drm_mode_set_name(mode);
>
> - mode->width_mm = ili->conf->width_mm;
> - mode->height_mm = ili->conf->height_mm;
> -
> connector->display_info.width_mm = mode->width_mm;
> connector->display_info.height_mm = mode->height_mm;
> connector->display_info.bus_flags |= DRM_BUS_FLAG_DE_HIGH |
> @@ -184,31 +188,32 @@ static int ili9341_get_modes(struct drm_panel *panel)
> return 1; /* Number of modes */
> }
>
> -static const struct drm_panel_funcs ili9341_drm_funcs = {
> +static const struct drm_panel_funcs dt024ctft_drm_funcs = {
> .disable = ili9341_disable,
> .unprepare = ili9341_unprepare,
> - .prepare = ili9341_prepare,
> + .prepare = dt024ctft_prepare,
> .enable = ili9341_enable,
> .get_modes = ili9341_get_modes,
> };
>
> +static const struct ili9341_config dt024ctft_data = {
> + .funcs = &dt024ctft_drm_funcs,
> + .mode = &prgb_240x320_mode,
> +};
> +
> static int ili9341_probe(struct spi_device *spi)
> {
> struct device *dev = &spi->dev;
> struct ili9341 *ili;
> - struct mipi_dbi *mipi;
> + struct mipi_dbi *dbi;
> struct gpio_desc *dc_gpio;
> int ret;
>
> - mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
> - if (!mipi)
> - return -ENOMEM;
> -
> ili = devm_kzalloc(dev, sizeof(*ili), GFP_KERNEL);
> if (!ili)
> return -ENOMEM;
>
> - ili->mipi = mipi;
> + dbi = &ili->dbi;
>
> spi_set_drvdata(spi, ili);
>
> @@ -222,16 +227,16 @@ static int ili9341_probe(struct spi_device *spi)
> return -ENODEV;
> }
>
> - ili->mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
> - if (IS_ERR(ili->mipi->reset)) {
> + dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
> + if (IS_ERR(dbi->reset)) {
> DRM_DEV_ERROR(dev, "failed to get gpio 'reset'\n");
> - return PTR_ERR(ili->mipi->reset);
> + return PTR_ERR(dbi->reset);
> }
>
> - ili->mipi->backlight = devm_of_find_backlight(dev);
> - if (IS_ERR(ili->mipi->backlight)) {
> + ili->backlight = devm_of_find_backlight(dev);
> + if (IS_ERR(ili->backlight)) {
> DRM_DEV_ERROR(dev, "failed to get backlight\n");
> - return PTR_ERR(ili->mipi->backlight);
> + return PTR_ERR(ili->backlight);
> }
>
> dc_gpio = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
> @@ -240,7 +245,7 @@ static int ili9341_probe(struct spi_device *spi)
> return PTR_ERR(dc_gpio);
> }
>
> - ret = mipi_dbi_spi_init(spi, ili->mipi, dc_gpio);
> + ret = mipi_dbi_spi_init(spi, dbi, dc_gpio);
> if (ret) {
> DRM_DEV_ERROR(dev, "MIPI-DBI SPI setup failed\n");
> return ret;
> @@ -248,7 +253,7 @@ static int ili9341_probe(struct spi_device *spi)
>
> drm_panel_init(&ili->panel);
> ili->panel.dev = dev;
> - ili->panel.funcs = &ili9341_drm_funcs;
> + ili->panel.funcs = ili->conf->funcs;
>
> return drm_panel_add(&ili->panel);
> }
> @@ -265,11 +270,6 @@ static int ili9341_remove(struct spi_device *spi)
> return 0;
> }
>
> -static const struct ili9341_config dt024ctft_data = {
> - .width_mm = 37,
> - .height_mm = 49,
> -};
> -
> static const struct of_device_id ili9341_of_match[] = {
> { .compatible = "displaytech,dt024ctft", .data = &dt024ctft_data },
> { /* sentinel */ }
> --
> 2.20.1
>
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