[PATCH] drm: mediatek: mtk_disp_gamma: Fix breakage due to merge issue

[AngeloGioacchino Del Regno]

While the commit that was sent to the mailing lists was fine, something
happened during merge and the mtk_gamma_set() function got broken as
a writel() was turned into a readl().

Fix that by changing that back to the expected writel().

Fixes: a6b39cd248f3 ("drm/mediatek: De-commonize disp_aal/disp_gamma gamma_set functions")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index 2fada9d6c95f..52c752bc5f41 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -203,7 +203,7 @@ void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state)
 	/* Disable RELAY mode to pass the processed image */
 	cfg_val &= ~GAMMA_RELAY_MODE;
 
-	cfg_val = readl(gamma->regs + DISP_GAMMA_CFG);
+	writel(cfg_val, gamma->regs + DISP_GAMMA_CFG);
 }
 
 void mtk_gamma_config(struct device *dev, unsigned int w,
-- 
2.42.0