[PATCH v2 03/13] drm/mediatek: adjust EDGE to match clock and data

Bibby Hsieh
2018-09-05T08:32:20Z

From: chunhui dai <chunhui.dai@mediatek.com>

The default timing of DPI data and clock is not match.
We could adjust this bit to make them match.

Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 8 ++++++++
drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 3db959fed493..df27107b1f0b 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -120,6 +120,7 @@ struct mtk_dpi_yc_limit {

struct mtk_dpi_conf {
const u32 reg_h_fre_con;
+ bool edge_sel_en;
};

static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
@@ -350,6 +351,12 @@ static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
}

+static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
+{
+ if (dpi->conf->edge_sel_en)
+ mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
+}
+
static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
enum mtk_dpi_out_color_format format)
{
@@ -535,6 +542,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
mtk_dpi_config_2n_h_fre(dpi);
+ mtk_dpi_config_disable_edge(dpi);
mtk_dpi_sw_reset(dpi, false);

return 0;
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
index 040444d7718d..d9db8c4cacd7 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
+++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
@@ -223,5 +223,6 @@
#define ESAV_CODE2 (0xFFF << 0)
#define ESAV_CODE3_MSB BIT(16)

+#define EDGE_SEL_EN BIT(5)
#define H_FRE_2N BIT(25)
#endif /* __MTK_DPI_REGS_H */
--
2.12.5.2.gbdf23ab