[PATCH v4 04/11] drm/mediatek: add clock factor for different IC

Bibby Hsieh
2018-10-02T08:10:34Z

different IC has different clock designed in HDMI, the factor for
calculate clock should be different. Usinng the data in of_node
to find this factor.

Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 24 +++++++++++++++---------
1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 0ce4b61efaeb..0dbe9345fa2e 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -113,6 +113,7 @@ struct mtk_dpi_yc_limit {
};

struct mtk_dpi_conf {
+ unsigned int (*cal_factor)(int clock);
u32 reg_h_fre_con;
bool edge_sel_en;
};
@@ -431,15 +432,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
unsigned int factor;

/* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
-
- if (mode->clock <= 27000)
- factor = 3 << 4;
- else if (mode->clock <= 84000)
- factor = 3 << 3;
- else if (mode->clock <= 167000)
- factor = 3 << 2;
- else
- factor = 3 << 1;
+ factor = dpi->conf->cal_factor(mode->clock);
drm_display_mode_to_videomode(mode, &vm);
pll_rate = vm.pixelclock * factor;

@@ -653,7 +646,20 @@ static const struct component_ops mtk_dpi_component_ops = {
.unbind = mtk_dpi_unbind,
};

+static unsigned int mt8173_calculate_factor(int clock)
+{
+ if (clock <= 27000)
+ return 3 << 4;
+ else if (clock <= 84000)
+ return 3 << 3;
+ else if (clock <= 167000)
+ return 3 << 2;
+ else
+ return 3 << 1;
+}
+
static const struct mtk_dpi_conf mt8173_conf = {
+ .cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
};

--
2.12.5.2.gbdf23ab