[PATCH v10 4/9] drm/mediatek: generalize mtk_dither_set() function

[Hsin-Yi Wang]

There may be data structure other than mtk_ddp_comp_dev that would call
mtk_dither_set(), so use regs as parameter instead of device.

Signed-off-by: Hsin-Yi Wang <hsi...@chromium.org>
---
 drivers/gpu/drm/mediatek/mtk_disp_drv.h     |  4 ++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 25 +++++++++++++--------
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h 
b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 46d199b7b4a29..c50d5fc9fd349 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -17,6 +17,10 @@ void mtk_color_config(struct device *dev, unsigned int w,
                      unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
 void mtk_color_start(struct device *dev);
 
+void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg 
*cmdq_reg,
+                          unsigned int bpc, unsigned int CFG,
+                          struct cmdq_pkt *cmdq_pkt);
+
 void mtk_dpi_start(struct device *dev);
 void mtk_dpi_stop(struct device *dev);
 
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c 
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 7b5293429426d..53d25823a37cc 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -151,33 +151,40 @@ static void mtk_ddp_clk_disable(struct device *dev)
        clk_disable_unprepare(priv->clk);
 }
 
-static void mtk_dither_set(struct device *dev, unsigned int bpc,
-                   unsigned int CFG, struct cmdq_pkt *cmdq_pkt)
-{
-       struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev);
 
+void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg 
*cmdq_reg,
+                          unsigned int bpc, unsigned int CFG, struct cmdq_pkt 
*cmdq_pkt)
+{
        /* If bpc equal to 0, the dithering function didn't be enabled */
        if (bpc == 0)
                return;
 
        if (bpc >= MTK_MIN_BPC) {
-               mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, 
DISP_DITHER_5);
-               mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, 
DISP_DITHER_7);
+               mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_5);
+               mtk_ddp_write(cmdq_pkt, 0, cmdq_reg, regs, DISP_DITHER_7);
                mtk_ddp_write(cmdq_pkt,
                              DITHER_LSB_ERR_SHIFT_R(MTK_MAX_BPC - bpc) |
                              DITHER_ADD_LSHIFT_R(MTK_MAX_BPC - bpc) |
                              DITHER_NEW_BIT_MODE,
-                             &priv->cmdq_reg, priv->regs, DISP_DITHER_15);
+                             cmdq_reg, regs, DISP_DITHER_15);
                mtk_ddp_write(cmdq_pkt,
                              DITHER_LSB_ERR_SHIFT_B(MTK_MAX_BPC - bpc) |
                              DITHER_ADD_LSHIFT_B(MTK_MAX_BPC - bpc) |
                              DITHER_LSB_ERR_SHIFT_G(MTK_MAX_BPC - bpc) |
                              DITHER_ADD_LSHIFT_G(MTK_MAX_BPC - bpc),
-                             &priv->cmdq_reg, priv->regs, DISP_DITHER_16);
-               mtk_ddp_write(cmdq_pkt, DISP_DITHERING, &priv->cmdq_reg, 
priv->regs, CFG);
+                             cmdq_reg, regs, DISP_DITHER_16);
+               mtk_ddp_write(cmdq_pkt, DISP_DITHERING, cmdq_reg, regs, CFG);
        }
 }
 
+static void mtk_dither_set(struct device *dev, unsigned int bpc,
+                   unsigned int CFG, struct cmdq_pkt *cmdq_pkt)
+{
+       struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev);
+
+       mtk_dither_set_common(priv->regs, &priv->cmdq_reg, bpc, CFG, cmdq_pkt);
+}
+
 static void mtk_od_config(struct device *dev, unsigned int w,
                          unsigned int h, unsigned int vrefresh,
                          unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
-- 
2.30.0.280.ga3ce27912f-goog