drm/mediatek: add clock factor for different IC

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.

Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 0ce4b61..0dbe934 100644 (file)
--- 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,
 };