[PATCH v2 06/11] drm/mediatek: mtk_dp: Use PHY API for PHY power sequences

[AngeloGioacchino Del Regno]

The PHY driver has gained support for .power_on() and .power_off()
callbacks: use the API provided phy_power_on(), phy_power_off()
functions instead of writing into PHY registers from this driver.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/mediatek/mtk_dp.c | 42 ++++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 88e22a9553e0..9c28616c6ada 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -1404,6 +1404,8 @@ static void mtk_dp_aux_panel_poweron(struct mtk_dp *mtk_dp, bool pwron)
 
 static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
 {
+	int ret;
+
 	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
 			   0, SW_RST_B_PHYD);
 
@@ -1414,20 +1416,35 @@ static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
 			   SW_RST_B_PHYD, SW_RST_B_PHYD);
 	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
 			   DP_PWR_STATE_BANDGAP_TPLL, DP_PWR_STATE_MASK);
-	regmap_write(mtk_dp->regs, DP_PHY_AUX_RX_CTL,
-		     RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
-		     RG_DPAUX_RX_EN);
-	regmap_clear_bits(mtk_dp->regs, MTK_DP_0034, DA_CKM_CKTX0_EN_FORCE_EN);
+
+	if (mtk_dp->phy_dev) {
+		regmap_write(mtk_dp->regs, DP_PHY_AUX_RX_CTL,
+			     RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
+			     RG_DPAUX_RX_EN);
+		regmap_clear_bits(mtk_dp->regs, MTK_DP_0034, DA_CKM_CKTX0_EN_FORCE_EN);
+	} else {
+		ret = phy_power_on(mtk_dp->phy);
+		if (ret)
+			dev_warn(mtk_dp->dev, "Could not power on PHY!\n");
+	}
 }
 
 static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
 {
+	int ret;
+
 	mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
 
-	regmap_set_bits(mtk_dp->regs, MTK_DP_0034, DA_CKM_CKTX0_EN_FORCE_EN);
+	if (unlikely(mtk_dp->phy_dev)) {
+		regmap_set_bits(mtk_dp->regs, MTK_DP_0034, DA_CKM_CKTX0_EN_FORCE_EN);
 
-	/* Disable RX */
-	regmap_write(mtk_dp->regs, DP_PHY_AUX_RX_CTL, 0);
+		/* Disable RX */
+		regmap_write(mtk_dp->regs, DP_PHY_AUX_RX_CTL, 0);
+	} else {
+		ret = phy_power_off(mtk_dp->phy);
+		if (ret)
+			dev_warn(mtk_dp->dev, "Could not power off PHY!\n");
+	}
 
 	mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
 		     0x550 | FUSE_SEL | MEM_ISO_EN);
@@ -2711,12 +2728,11 @@ static int mtk_dp_register_audio_driver(struct device *dev)
 	if (IS_ERR(mtk_dp->audio_pdev))
 		return PTR_ERR(mtk_dp->audio_pdev);
 
-	ret = devm_add_action_or_reset(dev, mtk_dp_unregister_pdevs, mtk_dp->phy_dev);
-	if (ret) {
-		platform_device_unregister(mtk_dp->audio_pdev);
+	ret = devm_add_action_or_reset(dev, mtk_dp_unregister_pdevs, mtk_dp->audio_pdev);
+	if (ret)
 		return dev_err_probe(dev, ret,
 				     "Failed to add codec unregister devm action");
-	}
+
 	return 0;
 }
 
@@ -2734,11 +2750,9 @@ static int mtk_dp_register_phy(struct mtk_dp *mtk_dp)
 				     "Failed to create device mediatek-dp-phy\n");
 
 	ret = devm_add_action_or_reset(dev, mtk_dp_unregister_pdevs, mtk_dp->phy_dev);
-	if (ret) {
-		platform_device_unregister(mtk_dp->phy_dev);
+	if (ret)
 		return dev_err_probe(dev, ret,
 				     "Failed to add phy unregister devm action");
-	}
 
 	mtk_dp_get_calibration_data(mtk_dp);
 
-- 
2.54.0