[PATCH v13 05/14] drm/mediatek: dpi: implement a swap_input toggle in SoC config

From: Bo-Chen Chen
Date: Tue Jun 21 2022 - 07:38:11 EST


From: Guillaume Ranquet <granquet@xxxxxxxxxxxx>

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@xxxxxxxxxxxx>
[Bo-Chen: Add modification reason in commit message.]
Signed-off-by: Bo-Chen Chen <rex-bc.chen@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Reviewed-by: Rex-BC Chen <rex-bc.chen@xxxxxxxxxxxx>
Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index fc2ef10bef31..bacd6c13186f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -127,6 +127,7 @@ 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);
@@ -136,6 +137,7 @@ 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)
@@ -400,18 +402,24 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
(format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, false);
mtk_dpi_config_csc_enable(dpi, true);
- 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_BGR);
} else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
(format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
mtk_dpi_config_yuv422_enable(dpi, true);
mtk_dpi_config_csc_enable(dpi, true);
- mtk_dpi_config_swap_input(dpi, true);
+ if (dpi->conf->swap_input_support)
+ mtk_dpi_config_swap_input(dpi, true);
+ else
+ dev_warn(dpi->dev,
+ "Failed to swap input, hw is not supported.\n");
mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
} else {
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);
}
}
@@ -823,6 +831,7 @@ 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 = {
@@ -833,6 +842,7 @@ 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 = {
@@ -842,6 +852,7 @@ 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 = {
@@ -851,6 +862,7 @@ 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)
--
2.18.0