drivers/video/fbdev/omap2/omapfb/displays/encoder-tpd12s015.c

Source file repositories/reference/linux-study-clean/drivers/video/fbdev/omap2/omapfb/displays/encoder-tpd12s015.c

File Facts

System
Linux kernel
Corpus path
drivers/video/fbdev/omap2/omapfb/displays/encoder-tpd12s015.c
Extension
.c
Size
7183 bytes
Lines
326
Domain
Driver Families
Bucket
drivers/video
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct panel_drv_data {
	struct omap_dss_device dssdev;
	struct omap_dss_device *in;

	struct gpio_desc *ct_cp_hpd_gpio;
	struct gpio_desc *ls_oe_gpio;
	struct gpio_desc *hpd_gpio;

	struct omap_video_timings timings;
};

#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)

static int tpd_connect(struct omap_dss_device *dssdev,
		struct omap_dss_device *dst)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	r = in->ops.hdmi->connect(in, dssdev);
	if (r)
		return r;

	dst->src = dssdev;
	dssdev->dst = dst;

	if (ddata->ct_cp_hpd_gpio) {
		gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
		/* DC-DC converter needs at max 300us to get to 90% of 5V */
		udelay(300);
	}

	return 0;
}

static void tpd_disconnect(struct omap_dss_device *dssdev,
		struct omap_dss_device *dst)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	WARN_ON(dst != dssdev->dst);

	if (dst != dssdev->dst)
		return;

	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);

	dst->src = NULL;
	dssdev->dst = NULL;

	in->ops.hdmi->disconnect(in, &ddata->dssdev);
}

static int tpd_enable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
		return 0;

	in->ops.hdmi->set_timings(in, &ddata->timings);

	r = in->ops.hdmi->enable(in);
	if (r)
		return r;

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return r;
}

static void tpd_disable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
		return;

	in->ops.hdmi->disable(in);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void tpd_set_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)

Annotation

Implementation Notes