[PATCH v4 1/2] media: aspeed: Add macro for the fields of the mode-detect registers

From: Jammy Huang
Date: Tue Jan 18 2022 - 05:07:42 EST


VE_MODE_DT_HOR_TOLER: the tolerance in detecting for stable horizontal
signal.
VE_MODE_DT_VER_TOLER: the tolerance in detecting for stable vertical
signal.
VE_MODE_DT_HOR_STABLE: the minimum required count in detecting stable
HSYNC signal to set mode detection horizontal signal stable.
VE_MODE_DT_VER_STABLE: the minimum required count in detecting stable
VSYNC signal to set mode detection vertical signal stable.

Signed-off-by: Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>
---
drivers/media/platform/aspeed-video.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
index 4f5f5dd364ee..5ba4d70c8dab 100644
--- a/drivers/media/platform/aspeed-video.c
+++ b/drivers/media/platform/aspeed-video.c
@@ -190,6 +190,12 @@
#define VE_INTERRUPT_VSYNC_DESC BIT(11)

#define VE_MODE_DETECT 0x30c
+#define VE_MODE_DT_HOR_TOLER GENMASK(31, 28)
+#define VE_MODE_DT_VER_TOLER GENMASK(27, 24)
+#define VE_MODE_DT_HOR_STABLE GENMASK(23, 20)
+#define VE_MODE_DT_VER_STABLE GENMASK(19, 16)
+#define VE_MODE_DT_EDG_THROD GENMASK(15, 8)
+
#define VE_MEM_RESTRICT_START 0x310
#define VE_MEM_RESTRICT_END 0x314

@@ -1238,7 +1244,12 @@ static void aspeed_video_init_regs(struct aspeed_video *video)
aspeed_video_write(video, VE_SCALING_FILTER3, 0x00200000);

/* Set mode detection defaults */
- aspeed_video_write(video, VE_MODE_DETECT, 0x22666500);
+ aspeed_video_write(video, VE_MODE_DETECT,
+ FIELD_PREP(VE_MODE_DT_HOR_TOLER, 2) |
+ FIELD_PREP(VE_MODE_DT_VER_TOLER, 2) |
+ FIELD_PREP(VE_MODE_DT_HOR_STABLE, 6) |
+ FIELD_PREP(VE_MODE_DT_VER_STABLE, 6) |
+ FIELD_PREP(VE_MODE_DT_EDG_THROD, 0x65));

aspeed_video_write(video, VE_BCD_CTRL, 0);
}
--
2.25.1