1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h
new file mode 100644
index 000000000000..b1eb2de6d2a7
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_link.h
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DP_LINK_H_
+#define _DP_LINK_H_
+
+#include "dp_aux.h"
+#include <drm/display/drm_dp_helper.h>
+
+#define DS_PORT_STATUS_CHANGED 0x200
+#define DP_TEST_BIT_DEPTH_UNKNOWN 0xFFFFFFFF
+#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
+#define DP_MAX_NUM_DP_LANES    4
+
+struct msm_dp_link_info {
+	unsigned char revision;
+	unsigned int rate;
+	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;
+};
+
+/**
+ * mdss_dp_test_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
+ * git 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:
+		return 30;
+	case DP_TEST_BIT_DEPTH_UNKNOWN:
+	default:
+		return 0;
+	}
+}
+
+void msm_dp_link_reset_phy_params_vx_px(struct msm_dp_link *msm_dp_link);
+u32 msm_dp_link_get_test_bits_depth(struct msm_dp_link *msm_dp_link, u32 bpp);
+int msm_dp_link_process_request(struct msm_dp_link *msm_dp_link);
+int msm_dp_link_get_colorimetry_config(struct msm_dp_link *msm_dp_link);
+int msm_dp_link_adjust_levels(struct msm_dp_link *msm_dp_link, u8 *link_status);
+bool msm_dp_link_send_test_response(struct msm_dp_link *msm_dp_link);
+int msm_dp_link_psm_config(struct msm_dp_link *msm_dp_link,
+		struct msm_dp_link_info *link_info, bool enable);
+bool msm_dp_link_send_edid_checksum(struct msm_dp_link *msm_dp_link, u8 checksum);
+
+/**
+ * msm_dp_link_get() - get the functionalities of dp test module
+ *
+ *
+ * return: a pointer to msm_dp_link struct
+ */
+struct msm_dp_link *msm_dp_link_get(struct device *dev, struct drm_dp_aux *aux);
+
+#endif /* _DP_LINK_H_ */