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Message-ID: <fc301b26d4e0fea003a9b6c2237eaca16a4929f6.camel@mediatek.com>
Date: Mon, 13 Jun 2022 11:12:33 +0800
From: Rex-BC Chen <rex-bc.chen@...iatek.com>
To: CK Hu <ck.hu@...iatek.com>,
Guillaume Ranquet <granquet@...libre.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Matthias Brugger <matthias.bgg@...il.com>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
"Kishon Vijay Abraham I" <kishon@...com>,
Vinod Koul <vkoul@...nel.org>, "Helge Deller" <deller@....de>,
Jitao shi <jitao.shi@...iatek.com>
CC: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
<dri-devel@...ts.freedesktop.org>,
<linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-phy@...ts.infradead.org>, <linux-fbdev@...r.kernel.org>
Subject: Re: [PATCH v10 08/21] drm/mediatek: dpi: implement a swap_input
toggle in SoC config
On Mon, 2022-05-30 at 15:50 +0800, CK Hu wrote:
> Hi, Guillaume:
>
>
> On Mon, 2022-05-23 at 12:47 +0200, Guillaume Ranquet wrote:
> > Adds a bit of flexibility to support SoCs without swap_input
> > support
> >
> > Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > Reviewed-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> > ---
> > drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++++++++++---
> > 1 file changed, 11 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index 545a1337cc89..454f8563efae 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;
> > const struct mtk_dpi_yc_limit *limit;
> > };
> >
> > @@ -378,18 +379,21 @@ 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);
>
> As [1], please keep in touch with Mediatek engineer.
>
> Regards,
> CK
>
> [1]
>
https://patchwork.kernel.org/project/linux-mediatek/patch/20220218145437.18563-8-granquet@baylibre.com/
>
Hello CK,
the reason is the hardware design of dp_intf does not support input
swap.
I will add this in commit message.
BRs,
Bo-Chen
> > 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);
> > }
> > }
> > @@ -808,6 +812,7 @@ 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,
> > .limit = &mtk_dpi_limit,
> > };
> >
> > @@ -819,6 +824,7 @@ 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,
> > .limit = &mtk_dpi_limit,
> > };
> >
> > @@ -829,6 +835,7 @@ 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,
> > .limit = &mtk_dpi_limit,
> > };
> >
> > @@ -839,6 +846,7 @@ static const struct mtk_dpi_conf mt8192_conf =
> > {
> > .output_fmts = mt8173_output_fmts,
> > .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> > .is_ck_de_pol = true,
> > + .swap_input_support = true,
> > .limit = &mtk_dpi_limit,
> > };
> >
>
>
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