disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/rockchip/cdn-dp-reg.c
..
..
@@ -181,7 +181,7 @@
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 	return 0;
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 }
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183
 
184
-static int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val)
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+int cdn_dp_reg_write(struct cdn_dp_device *dp, u16 addr, u32 val)
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 {
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 	u8 msg[6];
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187
 
..
..
@@ -213,7 +213,12 @@
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 				   sizeof(field), field);
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 }
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215
 
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-int cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len)
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+/*
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+ * Returns the number of bytes transferred on success, or a negative
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+ * error code on failure. -ETIMEDOUT is returned if mailbox message was
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+ * not send successfully;
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+ */
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+ssize_t cdn_dp_dpcd_read(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len)
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 {
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 	u8 msg[5], reg[5];
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 	int ret;
..
..
@@ -239,24 +244,41 @@
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 		goto err_dpcd_read;
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245
 
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 	ret = cdn_dp_mailbox_read_receive(dp, data, len);
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+	if (!ret)
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+		return len;
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249
 
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 err_dpcd_read:
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+	DRM_DEV_ERROR(dp->dev, "dpcd read failed: %d\n", ret);
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 	return ret;
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 }
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254
 
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-int cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 value)
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+#define CDN_AUX_HEADER_SIZE	5
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+#define CDN_AUX_MSG_SIZE	20
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+/*
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+ * Returns the number of bytes transferred on success, or a negative error
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+ * code on failure. -ETIMEDOUT is returned if mailbox message was not send
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+ * success; -EINVAL is returned if get the wrong data size after message
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+ * is sent
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+ */
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+ssize_t cdn_dp_dpcd_write(struct cdn_dp_device *dp, u32 addr, u8 *data, u16 len)
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 {
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-	u8 msg[6], reg[5];
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+	u8 msg[CDN_AUX_MSG_SIZE + CDN_AUX_HEADER_SIZE];
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+	u8 reg[CDN_AUX_HEADER_SIZE];
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 	int ret;
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268
 
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-	msg[0] = 0;
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-	msg[1] = 1;
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+	if (WARN_ON(len > CDN_AUX_MSG_SIZE) || WARN_ON(len <= 0))
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+		return -EINVAL;
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+
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+	msg[0] = (len >> 8) & 0xff;
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+	msg[1] = len & 0xff;
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 	msg[2] = (addr >> 16) & 0xff;
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 	msg[3] = (addr >> 8) & 0xff;
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 	msg[4] = addr & 0xff;
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-	msg[5] = value;
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+
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+	memcpy(msg + CDN_AUX_HEADER_SIZE, data, len);
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+
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 	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX, DPTX_WRITE_DPCD,
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-				  sizeof(msg), msg);
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+				  CDN_AUX_HEADER_SIZE + len, msg);
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 	if (ret)
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 		goto err_dpcd_write;
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284
 
..
..
@@ -269,12 +291,43 @@
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 	if (ret)
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 		goto err_dpcd_write;
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293
 
272
-	if (addr != (reg[2] << 16 | reg[3] << 8 | reg[4]))
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+	if ((len != (reg[0] << 8 | reg[1])) ||
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+	    (addr != (reg[2] << 16 | reg[3] << 8 | reg[4]))) {
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 		ret = -EINVAL;
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+	} else {
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+		return len;
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+	}
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 err_dpcd_write:
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 	if (ret)
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 		DRM_DEV_ERROR(dp->dev, "dpcd write failed: %d\n", ret);
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+	return ret;
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+}
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+
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+int cdn_dp_get_aux_status(struct cdn_dp_device *dp)
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+{
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+	u8 status;
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+	int ret;
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+
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+	ret = cdn_dp_mailbox_send(dp, MB_MODULE_ID_DP_TX,
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+				  DPTX_GET_LAST_AUX_STAUS, 0, NULL);
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+	if (ret)
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+		goto err_get_hpd;
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+
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+	ret = cdn_dp_mailbox_validate_receive(dp, MB_MODULE_ID_DP_TX,
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+					      DPTX_GET_LAST_AUX_STAUS,
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+					      sizeof(status));
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+	if (ret)
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+		goto err_get_hpd;
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+
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+	ret = cdn_dp_mailbox_read_receive(dp, &status, sizeof(status));
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+	if (ret)
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+		goto err_get_hpd;
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+
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+	return status;
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+
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+err_get_hpd:
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+	DRM_DEV_ERROR(dp->dev, "get aux status failed: %d\n", ret);
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331
 	return ret;
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332
 }
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333
 
..
..
@@ -535,7 +588,7 @@
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 	if (ret)
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 		goto err_get_training_status;
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590
 
538
-	dp->max_rate = drm_dp_bw_code_to_link_rate(status[0]);
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+	dp->max_rate = status[0];
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 	dp->max_lanes = status[1];
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593
 
541
594
 err_get_training_status:
..
..
@@ -548,6 +601,31 @@
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 {
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 	int ret;
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603
 
604
+	/*
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+	 * DP firmware uses fixed phy config values to do training, but some
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+	 * boards need to adjust these values to fit for their unique hardware
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+	 * design. So if the phy is using custom config values, do software
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+	 * link training instead of relying on firmware, if software training
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+	 * fail, keep firmware training as a fallback if sw training fails.
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+	 */
611
+	ret = cdn_dp_software_train_link(dp);
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+	if (ret) {
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+		DRM_DEV_ERROR(dp->dev,
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+			"Failed to do software training %d\n", ret);
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+		goto do_fw_training;
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+	}
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+	ret = cdn_dp_reg_write(dp, SOURCE_HDTX_CAR, 0xf);
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+	if (ret) {
619
+		DRM_DEV_ERROR(dp->dev,
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+			"Failed to write SOURCE_HDTX_CAR register %d\n", ret);
621
+		goto do_fw_training;
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+	}
623
+	dp->use_fw_training = false;
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+	return 0;
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+
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+do_fw_training:
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+	dp->use_fw_training = true;
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+	DRM_DEV_DEBUG_KMS(dp->dev, "use fw training\n");
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629
 	ret = cdn_dp_training_start(dp);
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630
 	if (ret) {
553
631
 		DRM_DEV_ERROR(dp->dev, "Failed to start training %d\n", ret);
..
..
@@ -639,7 +717,7 @@
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 	bit_per_pix = (video->color_fmt == YCBCR_4_2_2) ?
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718
 		      (video->color_depth * 2) : (video->color_depth * 3);
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719
 
642
-	link_rate = dp->max_rate / 1000;
720
+	link_rate = drm_dp_bw_code_to_link_rate(dp->max_rate) / 1000;
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721
 
644
722
 	ret = cdn_dp_reg_write(dp, BND_HSYNC2VSYNC, VIF_BYPASS_INTERLACE);
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723
 	if (ret)