Support downsizing to 1/2 width and/or height in the CSI.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/gpu/ipu-v3/ipu-csi.c | 16 ++++++++++++++++
include/video/imx-ipu-v3.h | 1 +
2 files changed, 17 insertions(+)
diff --git a/drivers/gpu/ipu-v3/ipu-csi.c b/drivers/gpu/ipu-v3/ipu-csi.c
index 06631ac..77f172e 100644
--- a/drivers/gpu/ipu-v3/ipu-csi.c
+++ b/drivers/gpu/ipu-v3/ipu-csi.c
@@ -527,6 +527,22 @@ void ipu_csi_set_window(struct ipu_csi *csi, struct
v4l2_rect *w)
}
EXPORT_SYMBOL_GPL(ipu_csi_set_window);
+void ipu_csi_set_downsize(struct ipu_csi *csi, bool horiz, bool vert)
+{
+ unsigned long flags;
+ u32 reg;
+
+ spin_lock_irqsave(&csi->lock, flags);
+
+ reg = ipu_csi_read(csi, CSI_OUT_FRM_CTRL);
+ reg &= ~(CSI_HORI_DOWNSIZE_EN | CSI_VERT_DOWNSIZE_EN);
+ reg |= (horiz ? CSI_HORI_DOWNSIZE_EN : 0) |
+ (vert ? CSI_VERT_DOWNSIZE_EN : 0);
+ ipu_csi_write(csi, reg, CSI_OUT_FRM_CTRL);
+
+ spin_unlock_irqrestore(&csi->lock, flags);
+}
+
void ipu_csi_set_test_generator(struct ipu_csi *csi, bool active,
u32 r_value, u32 g_value, u32 b_value,
u32 pix_clk)
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 7adeaae0..5f2f26d 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -271,6 +271,7 @@ int ipu_csi_init_interface(struct ipu_csi *csi,
bool ipu_csi_is_interlaced(struct ipu_csi *csi);
void ipu_csi_get_window(struct ipu_csi *csi, struct v4l2_rect *w);
void ipu_csi_set_window(struct ipu_csi *csi, struct v4l2_rect *w);
+void ipu_csi_set_downsize(struct ipu_csi *csi, bool horiz, bool vert);
void ipu_csi_set_test_generator(struct ipu_csi *csi, bool active,
u32 r_value, u32 g_value, u32 b_value,
u32 pix_clk);
--
2.9.3
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