drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer()

[ Upstream commit fd70e2019bfbcb0ed90c5e23839bf510ce6acf8f ]

Change logging from drm_{err,info}() to dev_{err,info}() in functions
mtk_dp_aux_transfer() and mtk_dp_aux_do_transfer(): this will be
essential to avoid getting NULL pointer kernel panics if any kind
of error happens during AUX transfers happening before the bridge
is attached.

This may potentially start happening in a later commit implementing
aux-bus support, as AUX transfers will be triggered from the panel
driver (for EDID) before the mtk-dp bridge gets attached, and it's
done in preparation for the same.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230725073234.55892-4-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 4c249939a6c3b2178c4672ad44ae02990dd3014c..395a190274cfb5a30ecb46c034c867a8b28ecd7b 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -847,7 +847,7 @@ static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool is_read, u8 cmd,
                u32 phy_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) &
                                 AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
                if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
-                       drm_err(mtk_dp->drm_dev,
+                       dev_err(mtk_dp->dev,
                                "AUX Rx Aux hang, need SW reset\n");
                        return -EIO;
                }
@@ -2062,7 +2062,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
                is_read = true;
                break;
        default:
-               drm_err(mtk_aux->drm_dev, "invalid aux cmd = %d\n",
+               dev_err(mtk_dp->dev, "invalid aux cmd = %d\n",
                        msg->request);
                ret = -EINVAL;
                goto err;
@@ -2078,7 +2078,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
                                             to_access, &msg->reply);
 
                if (ret) {
-                       drm_info(mtk_dp->drm_dev,
+                       dev_info(mtk_dp->dev,
                                 "Failed to do AUX transfer: %d\n", ret);
                        goto err;
                }