[PATCH drm-dp 3/4] drm/hisilicon/hibmc: add dp kapi moduel in hibmc drivers

[shiyongbang]

From: baihan li <libaihan at huawei.com>

Build a kapi level that hibmc driver can enable dp by
calling these kapi functions.

Signed-off-by: baihan li <libaihan at huawei.com>
---
 drivers/gpu/drm/hisilicon/hibmc/Makefile      |  2 +-
 .../gpu/drm/hisilicon/hibmc/dp/dp_config.h    | 20 ++++++++
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.c  | 12 ++---
 drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.h  | 48 +++++++++++++++++++
 4 files changed, 75 insertions(+), 7 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.h

diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index 94d77da88bbf..693036dfab52 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
 hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_i2c.o \
-	       dp/dp_aux.o dp/dp_link.o
+	       dp/dp_aux.o dp/dp_link.o dp/dp_kapi.o
 
 obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
new file mode 100644
index 000000000000..a6353a808cc4
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_config.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_CONFIG_H
+#define DP_CONFIG_H
+
+#define DP_BPP 24
+#define DP_SYMBOL_PER_FCLK 4
+#define DP_MIN_PULSE_NUM 0x9
+#define DP_MSA1 0x20
+#define DP_MSA2 0x845c00
+#define DP_OFFSET 0x1e0000
+#define DP_HDCP 0x2
+#define DP_INT_RST 0xffff
+#define DP_DPTX_RST 0x3ff
+#define DP_CLK_EN 0x7
+#define DP_SYNC_EN_MASK 0x3
+#define DP_LINK_RATE_CAL 27
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.c
index 4091723473ad..ca7edc69427c 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.c
@@ -64,12 +64,12 @@ static void hibmc_dp_set_tu(struct hibmc_dp_dev *dp, struct dp_mode *mode)
 	rate_ks = dp->link.cap.link_rate * DP_LINK_RATE_CAL;
 	value = (pixel_clock * bpp * 5000) / (61 * lane_num * rate_ks);
 
-	if (value % 10 == 9) { /* 10: div, 9: carry */
-		tu_symbol_size = value / 10 + 1; /* 10: div */
+	if (value % 10 == 9) { /* 9 carry */
+		tu_symbol_size = value / 10 + 1;
 		tu_symbol_frac_size = 0;
 	} else {
-		tu_symbol_size = value / 10; /* 10: div */
-		tu_symbol_frac_size = value % 10 + 1; /* 10: div */
+		tu_symbol_size = value / 10;
+		tu_symbol_frac_size = value % 10 + 1;
 	}
 
 	drm_info(dp->dev, "tu value: %u.%u value: %u\n",
@@ -158,7 +158,7 @@ static void hibmc_dp_link_cfg(struct hibmc_dp_dev *dp, struct dp_mode *mode)
 	dp_write_bits(dp->base + DP_VIDEO_CTRL,
 		      DP_CFG_STREAM_HSYNC_POLARITY, mode->h_pol);
 
-	/* MSA mic 0 and 1*/
+	/* MSA mic 0 and 1 */
 	writel(DP_MSA1, dp->base + DP_VIDEO_MSA1);
 	writel(DP_MSA2, dp->base + DP_VIDEO_MSA2);
 
@@ -167,7 +167,7 @@ static void hibmc_dp_link_cfg(struct hibmc_dp_dev *dp, struct dp_mode *mode)
 	dp_write_bits(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_RGB_ENABLE, 0x1);
 	dp_write_bits(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_VIDEO_MAPPING, 0);
 
-	/*divide 2: up even */
+	/* divide 2: up even */
 	if (timing_delay % 2)
 		timing_delay++;
 
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.h
new file mode 100644
index 000000000000..6b07642d55b8
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_kapi.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_KAPI_H
+#define DP_KAPI_H
+
+#include <linux/types.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_print.h>
+#include <linux/delay.h>
+
+struct hibmc_dp_dev;
+
+struct dp_mode {
+	u32 h_total;
+	u32 h_active;
+	u32 h_blank;
+	u32 h_front;
+	u32 h_sync;
+	u32 h_back;
+	bool h_pol;
+	u32 v_total;
+	u32 v_active;
+	u32 v_blank;
+	u32 v_front;
+	u32 v_sync;
+	u32 v_back;
+	bool v_pol;
+	u32 field_rate;
+	u32 pixel_clock; // khz
+};
+
+struct hibmc_dp {
+	struct hibmc_dp_dev *dp_dev;
+	struct drm_device *drm_dev;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	void __iomem *mmio;
+};
+
+int hibmc_dp_kapi_init(struct hibmc_dp *dp);
+void hibmc_dp_kapi_uninit(struct hibmc_dp *dp);
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct dp_mode *mode);
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable);
+
+#endif
-- 
2.33.0