diff mbox series

[v8,06/19] drm/mediatek: dpi: implement a CK/DE pol toggle in board config

Message ID 20220218145437.18563-7-granquet@baylibre.com (mailing list archive)
State New, archived
Headers show
Series drm/mediatek: Add mt8195 DisplayPort driver | expand

Commit Message

Guillaume Ranquet Feb. 18, 2022, 2:54 p.m. UTC
Adds a bit of flexibility to support boards without CK/DE pol support

Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

Comments

Chun-Kuang Hu Feb. 21, 2022, 2:14 a.m. UTC | #1
HI, Guillaume:

Guillaume Ranquet <granquet@baylibre.com> 於 2022年2月18日 週五 下午10:56寫道:
>
> Adds a bit of flexibility to support boards without CK/DE pol support

I'm not sure what the term 'board' mean. Do you mean different board
with different panel but all with mt8195-dpintf? If so, you should get
CK/DE support from panel driver not fix this information in dpi
driver.

Regards,
Chun-Kuang.

>
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 4746eb3425674..545a1337cc899 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -125,6 +125,7 @@ struct mtk_dpi_conf {
>         bool edge_sel_en;
>         const u32 *output_fmts;
>         u32 num_output_fmts;
> +       bool is_ck_de_pol;
>         const struct mtk_dpi_yc_limit *limit;
>  };
>
> @@ -211,13 +212,20 @@ static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
>                                struct mtk_dpi_polarities *dpi_pol)
>  {
>         unsigned int pol;
> +       unsigned int mask;
>
> -       pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
> -             (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
> -             (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
> +       mask = HSYNC_POL | VSYNC_POL;
> +       pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
>               (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
> -       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
> -                    CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
> +       if (dpi->conf->is_ck_de_pol) {
> +               mask |= CK_POL | DE_POL;
> +               pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
> +                       0 : CK_POL) |
> +                      (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
> +                       0 : DE_POL);
> +       }
> +
> +       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
>  }
>
>  static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
> @@ -799,6 +807,7 @@ static const struct mtk_dpi_conf mt8173_conf = {
>         .max_clock_khz = 300000,
>         .output_fmts = mt8173_output_fmts,
>         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> +       .is_ck_de_pol = true,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -809,6 +818,7 @@ static const struct mtk_dpi_conf mt2701_conf = {
>         .max_clock_khz = 150000,
>         .output_fmts = mt8173_output_fmts,
>         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> +       .is_ck_de_pol = true,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -818,6 +828,7 @@ static const struct mtk_dpi_conf mt8183_conf = {
>         .max_clock_khz = 100000,
>         .output_fmts = mt8183_output_fmts,
>         .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
> +       .is_ck_de_pol = true,
>         .limit = &mtk_dpi_limit,
>  };
>
> @@ -827,6 +838,7 @@ static const struct mtk_dpi_conf mt8192_conf = {
>         .max_clock_khz = 150000,
>         .output_fmts = mt8173_output_fmts,
>         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> +       .is_ck_de_pol = true,
>         .limit = &mtk_dpi_limit,
>  };
>
> --
> 2.34.1
>
AngeloGioacchino Del Regno Feb. 21, 2022, 2:30 p.m. UTC | #2
Il 18/02/22 15:54, Guillaume Ranquet ha scritto:
> Adds a bit of flexibility to support boards without CK/DE pol support
> 
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>

s/board/SoC/g

After the change,
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Guillaume Ranquet Feb. 25, 2022, 10:52 a.m. UTC | #3
Quoting Chun-Kuang Hu (2022-02-21 03:14:02)
> HI, Guillaume:
>
> Guillaume Ranquet <granquet@baylibre.com> 於 2022年2月18日 週五 下午10:56寫道:
> >
> > Adds a bit of flexibility to support boards without CK/DE pol support
>
> I'm not sure what the term 'board' mean. Do you mean different board
> with different panel but all with mt8195-dpintf? If so, you should get
> CK/DE support from panel driver not fix this information in dpi
> driver.
>
> Regards,
> Chun-Kuang.
>

Hi Chun-Kuang,

The correct term (as pointed by Angelo) would be 'SoC' instead of
'board' I guess.
My understanding is that every SoC might have or might not have CK/DE support.


I'll try to dig into the documentation I have to understand exactly
where this support
is coming from.

Thx,
Guillaume.

> >
> > Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_dpi.c | 22 +++++++++++++++++-----
> >  1 file changed, 17 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index 4746eb3425674..545a1337cc899 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > @@ -125,6 +125,7 @@ struct mtk_dpi_conf {
> >         bool edge_sel_en;
> >         const u32 *output_fmts;
> >         u32 num_output_fmts;
> > +       bool is_ck_de_pol;
> >         const struct mtk_dpi_yc_limit *limit;
> >  };
> >
> > @@ -211,13 +212,20 @@ static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
> >                                struct mtk_dpi_polarities *dpi_pol)
> >  {
> >         unsigned int pol;
> > +       unsigned int mask;
> >
> > -       pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
> > -             (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
> > -             (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
> > +       mask = HSYNC_POL | VSYNC_POL;
> > +       pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
> >               (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
> > -       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
> > -                    CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
> > +       if (dpi->conf->is_ck_de_pol) {
> > +               mask |= CK_POL | DE_POL;
> > +               pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
> > +                       0 : CK_POL) |
> > +                      (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
> > +                       0 : DE_POL);
> > +       }
> > +
> > +       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
> >  }
> >
> >  static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
> > @@ -799,6 +807,7 @@ static const struct mtk_dpi_conf mt8173_conf = {
> >         .max_clock_khz = 300000,
> >         .output_fmts = mt8173_output_fmts,
> >         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> > +       .is_ck_de_pol = true,
> >         .limit = &mtk_dpi_limit,
> >  };
> >
> > @@ -809,6 +818,7 @@ static const struct mtk_dpi_conf mt2701_conf = {
> >         .max_clock_khz = 150000,
> >         .output_fmts = mt8173_output_fmts,
> >         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> > +       .is_ck_de_pol = true,
> >         .limit = &mtk_dpi_limit,
> >  };
> >
> > @@ -818,6 +828,7 @@ static const struct mtk_dpi_conf mt8183_conf = {
> >         .max_clock_khz = 100000,
> >         .output_fmts = mt8183_output_fmts,
> >         .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
> > +       .is_ck_de_pol = true,
> >         .limit = &mtk_dpi_limit,
> >  };
> >
> > @@ -827,6 +838,7 @@ static const struct mtk_dpi_conf mt8192_conf = {
> >         .max_clock_khz = 150000,
> >         .output_fmts = mt8173_output_fmts,
> >         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
> > +       .is_ck_de_pol = true,
> >         .limit = &mtk_dpi_limit,
> >  };
> >
> > --
> > 2.34.1
> >
diff mbox series

Patch

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 4746eb3425674..545a1337cc899 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -125,6 +125,7 @@  struct mtk_dpi_conf {
 	bool edge_sel_en;
 	const u32 *output_fmts;
 	u32 num_output_fmts;
+	bool is_ck_de_pol;
 	const struct mtk_dpi_yc_limit *limit;
 };
 
@@ -211,13 +212,20 @@  static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
 			       struct mtk_dpi_polarities *dpi_pol)
 {
 	unsigned int pol;
+	unsigned int mask;
 
-	pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
-	      (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
-	      (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
+	mask = HSYNC_POL | VSYNC_POL;
+	pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
 	      (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
-	mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
-		     CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
+	if (dpi->conf->is_ck_de_pol) {
+		mask |= CK_POL | DE_POL;
+		pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
+			0 : CK_POL) |
+		       (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
+			0 : DE_POL);
+	}
+
+	mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
 }
 
 static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
@@ -799,6 +807,7 @@  static const struct mtk_dpi_conf mt8173_conf = {
 	.max_clock_khz = 300000,
 	.output_fmts = mt8173_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+	.is_ck_de_pol = true,
 	.limit = &mtk_dpi_limit,
 };
 
@@ -809,6 +818,7 @@  static const struct mtk_dpi_conf mt2701_conf = {
 	.max_clock_khz = 150000,
 	.output_fmts = mt8173_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+	.is_ck_de_pol = true,
 	.limit = &mtk_dpi_limit,
 };
 
@@ -818,6 +828,7 @@  static const struct mtk_dpi_conf mt8183_conf = {
 	.max_clock_khz = 100000,
 	.output_fmts = mt8183_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
+	.is_ck_de_pol = true,
 	.limit = &mtk_dpi_limit,
 };
 
@@ -827,6 +838,7 @@  static const struct mtk_dpi_conf mt8192_conf = {
 	.max_clock_khz = 150000,
 	.output_fmts = mt8173_output_fmts,
 	.num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+	.is_ck_de_pol = true,
 	.limit = &mtk_dpi_limit,
 };