[PATCH v2 06/13] drm/mediatek: add dpi driver for mt2701 and mt7623

[Bibby Hsieh]

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

This patch adds dpi dirver suppot for both mt2701 and mt7623.
And also support other (existing or future) chips that use
the same binding and driver.

Signed-off-by: chunhui dai <chunhui....@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c     | 25 ++++++++++++++++++++++---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c |  2 ++
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c 
b/drivers/gpu/drm/mediatek/mtk_dpi.c
index ed2c153c70a2..1af25765ab5f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -641,9 +641,7 @@ static int mtk_dpi_bind(struct device *dev, struct device 
*master, void *data)
        }
        drm_encoder_helper_add(&dpi->encoder, &mtk_dpi_encoder_helper_funcs);
 
-       /* Currently DPI0 is fixed to be driven by OVL1 */
-       dpi->encoder.possible_crtcs = BIT(1);
-
+       dpi->encoder.possible_crtcs = BIT(0) | BIT(1);
        ret = drm_bridge_attach(&dpi->encoder, dpi->bridge, NULL);
        if (ret) {
                dev_err(dev, "Failed to attach bridge: %d\n", ret);
@@ -691,12 +689,33 @@ static unsigned int mt8173_calculate_factor(int clock)
                return 3 << 1;
 }
 
+static unsigned int mt2701_calculate_factor(int clock)
+{
+       if (clock <= 64000)
+               return 16;
+       else if (clock <= 128000)
+               return 8;
+       else if (clock <= 256000)
+               return 4;
+       else
+               return 2;
+}
+
 static const struct mtk_dpi_conf mt8173_conf = {
        .cal_factor = mt8173_calculate_factor,
        .reg_h_fre_con = 0xe0,
 };
 
+static const struct mtk_dpi_conf mt2701_conf = {
+       .cal_factor = mt2701_calculate_factor,
+       .reg_h_fre_con = 0xb0,
+       .edge_sel_en = true,
+};
+
 static const struct of_device_id mtk_dpi_of_ids[] = {
+       { .compatible = "mediatek,mt2701-dpi",
+         .data = &mt2701_conf,
+       },
        { .compatible = "mediatek,mt8173-dpi",
          .data = &mt8173_conf,
        },
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c 
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 39721119713b..d961112fa2f5 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -424,6 +424,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
          .data = (void *)MTK_DSI },
        { .compatible = "mediatek,mt8173-dsi",
          .data = (void *)MTK_DSI },
+       { .compatible = "mediatek,mt2701-dpi",
+         .data = (void *)MTK_DPI },
        { .compatible = "mediatek,mt8173-dpi",
          .data = (void *)MTK_DPI },
        { .compatible = "mediatek,mt2701-disp-mutex",
-- 
2.12.5.2.gbdf23ab

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