drivers/gpu/drm/msm/dp/dp_link.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/msm/dp/dp_link.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/msm/dp/dp_link.h
Extension
.h
Size
3454 bytes
Lines
134
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 msm_dp_link_info {
	unsigned char revision;
	unsigned int rate;
	unsigned int supported_rates[DP_MAX_SUPPORTED_RATES];
	unsigned int rate_set;
	bool use_rate_set;
	unsigned int num_lanes;
	unsigned long capabilities;
};

#define DP_TRAIN_LEVEL_MAX	3

struct msm_dp_link_test_video {
	u32 test_video_pattern;
	u32 test_bit_depth;
	u32 test_dyn_range;
	u32 test_h_total;
	u32 test_v_total;
	u32 test_h_start;
	u32 test_v_start;
	u32 test_hsync_pol;
	u32 test_hsync_width;
	u32 test_vsync_pol;
	u32 test_vsync_width;
	u32 test_h_width;
	u32 test_v_height;
	u32 test_rr_d;
	u32 test_rr_n;
};

struct msm_dp_link_test_audio {
	u32 test_audio_sampling_rate;
	u32 test_audio_channel_count;
	u32 test_audio_pattern_type;
	u32 test_audio_period_ch_1;
	u32 test_audio_period_ch_2;
	u32 test_audio_period_ch_3;
	u32 test_audio_period_ch_4;
	u32 test_audio_period_ch_5;
	u32 test_audio_period_ch_6;
	u32 test_audio_period_ch_7;
	u32 test_audio_period_ch_8;
};

struct msm_dp_link_phy_params {
	u32 phy_test_pattern_sel;
	u8 v_level;
	u8 p_level;
};

struct msm_dp_link {
	u8 lttpr_common_caps[DP_LTTPR_COMMON_CAP_SIZE];
	int lttpr_count;

	u32 sink_request;
	u32 test_response;

	u8 sink_count;
	struct msm_dp_link_test_video test_video;
	struct msm_dp_link_test_audio test_audio;
	struct msm_dp_link_phy_params phy_params;
	struct msm_dp_link_info link_params;

	u32 lane_map[DP_MAX_NUM_DP_LANES];
	u32 max_dp_lanes;
	u32 max_dp_link_rate;
};

/**
 * msm_dp_link_bit_depth_to_bpp() - convert test bit depth to bpp
 * @tbd: test bit depth
 *
 * Returns: the bits per pixel (bpp) to be used corresponding to the
 * bit depth value. This function assumes that bit depth has
 * already been validated.
 */
static inline u32 msm_dp_link_bit_depth_to_bpp(u32 tbd)
{
	/*
	 * Few simplistic rules and assumptions made here:
	 *    1. Bit depth is per color component
	 *    2. If bit depth is unknown return 0
	 *    3. Assume 3 color components
	 */
	switch (tbd) {
	case DP_TEST_BIT_DEPTH_6:
		return 18;
	case DP_TEST_BIT_DEPTH_8:
		return 24;
	case DP_TEST_BIT_DEPTH_10:

Annotation

Implementation Notes