From ea627e3cf80b4df0a760fd59a8ed4f8e751945bc Mon Sep 17 00:00:00 2001
From: Guillaume Ranquet <granquet@baylibre.com>
Date: Fri, 1 Jul 2022 11:58:36 +0800
Subject: drm/mediatek: dpi: Implement a swap_input toggle in SoC config
Git-commit: 3145095fae25de45b029746730f5249823ba059c
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

The hardware design of dp_intf does not support input swap, so we add
a bit of flexibility to support SoCs without swap_input support.
We also add a warning message if the hardware is not supported and it
needs to swap input.

Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20220701035845.16458-8-rex-bc.chen@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index cdf5ed5392e1..fc263fafb467 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -123,6 +123,7 @@ struct mtk_dpi_yc_limit {
  * @output_fmts: Array of supported output formats.
  * @num_output_fmts: Quantity of supported output formats.
  * @is_ck_de_pol: Support CK/DE polarity.
+ * @swap_input_support: Support input swap function.
  */
 struct mtk_dpi_conf {
 	unsigned int (*cal_factor)(int clock);
@@ -132,6 +133,7 @@ struct mtk_dpi_conf {
 	const u32 *output_fmts;
 	u32 num_output_fmts;
 	bool is_ck_de_pol;
+	bool swap_input_support;
 };
 
 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
@@ -395,7 +397,8 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
 	/* only support RGB888 */
 	mtk_dpi_config_yuv422_enable(dpi, false);
 	mtk_dpi_config_csc_enable(dpi, false);
-	mtk_dpi_config_swap_input(dpi, false);
+	if (dpi->conf->swap_input_support)
+		mtk_dpi_config_swap_input(dpi, false);
 	mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
 }
 
@@ -806,6 +809,7 @@ static const struct mtk_dpi_conf mt8173_conf = {
 	.output_fmts = mt8173_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
 	.is_ck_de_pol = true,
+	.swap_input_support = true,
 };
 
 static const struct mtk_dpi_conf mt2701_conf = {
@@ -816,6 +820,7 @@ static const struct mtk_dpi_conf mt2701_conf = {
 	.output_fmts = mt8173_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
 	.is_ck_de_pol = true,
+	.swap_input_support = true,
 };
 
 static const struct mtk_dpi_conf mt8183_conf = {
@@ -825,6 +830,7 @@ static const struct mtk_dpi_conf mt8183_conf = {
 	.output_fmts = mt8183_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
 	.is_ck_de_pol = true,
+	.swap_input_support = true,
 };
 
 static const struct mtk_dpi_conf mt8192_conf = {
@@ -834,6 +840,7 @@ static const struct mtk_dpi_conf mt8192_conf = {
 	.output_fmts = mt8183_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
 	.is_ck_de_pol = true,
+	.swap_input_support = true,
 };
 
 static int mtk_dpi_probe(struct platform_device *pdev)
-- 
2.38.1