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SubjectRe: [PATCH v12 04/14] drm/mediatek: dpi: implement a swap_input toggle in SoC config
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Hi, Bo-Chen:

On Mon, 2022-06-20 at 20:10 +0800, Bo-Chen Chen wrote:
> From: Guillaume Ranquet <granquet@baylibre.com>
>
> 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.

Reviewed-by: CK Hu <ck.hu@mediatek.com>

>
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> [Bo-Chen: Add modification reason in commit message.]
> 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>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 17 ++++++++++++++---
> 1 file changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index c88d64889402..5aab3029c54d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -126,6 +126,7 @@ 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)
> @@ -390,18 +391,24 @@ 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);
> }
> }
> @@ -813,6 +820,7 @@ 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 = {
> @@ -823,6 +831,7 @@ 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 = {
> @@ -832,6 +841,7 @@ 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 = {
> @@ -841,6 +851,7 @@ 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)

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