media: mtk-cir: lower de-glitch counter for rc-mm protocol

[ Upstream commit 5dd4b89dc098bf22cd13e82a308f42a02c102b2b ]

The rc-mm protocol can't be decoded by the mtk-cir since the de-glitch
filter removes pulses/spaces shorter than 294 microseconds.

Tested on a BananaPi R2.

Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/rc/mtk-cir.c b/drivers/media/rc/mtk-cir.c
index e42efd9..d37b85d 100644 (file)
--- a/drivers/media/rc/mtk-cir.c
+++ b/drivers/media/rc/mtk-cir.c
@@ -44,6 +44,11 @@
 /* Fields containing pulse width data */
 #define MTK_WIDTH_MASK           (GENMASK(7, 0))
 
+/* IR threshold */
+#define MTK_IRTHD               0x14
+#define MTK_DG_CNT_MASK                 (GENMASK(12, 8))
+#define MTK_DG_CNT(x)           ((x) << 8)
+
 /* Bit to enable interrupt */
 #define MTK_IRINT_EN             BIT(0)
 
@@ -409,6 +414,9 @@ static int mtk_ir_probe(struct platform_device *pdev)
        mtk_w32_mask(ir, val, ir->data->fields[MTK_HW_PERIOD].mask,
                     ir->data->fields[MTK_HW_PERIOD].reg);
 
+       /* Set de-glitch counter */
+       mtk_w32_mask(ir, MTK_DG_CNT(1), MTK_DG_CNT_MASK, MTK_IRTHD);
+
        /* Enable IR and PWM */
        val = mtk_r32(ir, MTK_CONFIG_HIGH_REG);
        val |= MTK_OK_COUNT(ir->data->ok_count) |  MTK_PWM_EN | MTK_IR_EN;