drivers/gpu/drm/imx/ipuv3/dw_hdmi-imx.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/imx/ipuv3/dw_hdmi-imx.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/imx/ipuv3/dw_hdmi-imx.c
Extension
.c
Size
6879 bytes
Lines
284
Domain
Driver Families
Bucket
drivers/gpu
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 imx_hdmi_encoder {
	struct drm_encoder encoder;
	struct imx_hdmi *hdmi;
};

struct imx_hdmi {
	struct device *dev;
	struct drm_bridge *bridge;
	struct dw_hdmi *hdmi;
	struct regmap *regmap;
};

static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
{
	return container_of(e, struct imx_hdmi_encoder, encoder)->hdmi;
}

static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
	{
		45250000, {
			{ 0x01e0, 0x0000 },
			{ 0x21e1, 0x0000 },
			{ 0x41e2, 0x0000 }
		},
	}, {
		92500000, {
			{ 0x0140, 0x0005 },
			{ 0x2141, 0x0005 },
			{ 0x4142, 0x0005 },
	},
	}, {
		148500000, {
			{ 0x00a0, 0x000a },
			{ 0x20a1, 0x000a },
			{ 0x40a2, 0x000a },
		},
	}, {
		216000000, {
			{ 0x00a0, 0x000a },
			{ 0x2001, 0x000f },
			{ 0x4002, 0x000f },
		},
	}, {
		~0UL, {
			{ 0x0000, 0x0000 },
			{ 0x0000, 0x0000 },
			{ 0x0000, 0x0000 },
		},
	}
};

static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
	/*      pixelclk     bpp8    bpp10   bpp12 */
	{
		54000000, { 0x091c, 0x091c, 0x06dc },
	}, {
		58400000, { 0x091c, 0x06dc, 0x06dc },
	}, {
		72000000, { 0x06dc, 0x06dc, 0x091c },
	}, {
		74250000, { 0x06dc, 0x0b5c, 0x091c },
	}, {
		118800000, { 0x091c, 0x091c, 0x06dc },
	}, {
		216000000, { 0x06dc, 0x0b5c, 0x091c },
	}, {
		~0UL, { 0x0000, 0x0000, 0x0000 },
	},
};

/*
 * Resistance term 133Ohm Cfg
 * PREEMP config 0.00
 * TX/CK level 10
 */
static const struct dw_hdmi_phy_config imx_phy_config[] = {
	/*pixelclk   symbol   term   vlev */
	{ 216000000, 0x800d, 0x0005, 0x01ad},
	{ ~0UL,      0x0000, 0x0000, 0x0000}
};

static void dw_hdmi_imx_encoder_enable(struct drm_encoder *encoder)
{
	struct imx_hdmi *hdmi = enc_to_imx_hdmi(encoder);
	int mux = drm_of_encoder_active_port_id(hdmi->dev->of_node, encoder);

	regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
			   IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
			   mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
}

Annotation

Implementation Notes