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Subject[PATCH v3 18/23] camss: vfe: Configure scaler module in VFE
Date
Add scaler module configuration support to be able to apply scaling.

Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
---
drivers/media/platform/qcom/camss-8x16/camss-vfe.c | 59 +++++++++++++++++-----
1 file changed, 46 insertions(+), 13 deletions(-)

diff --git a/drivers/media/platform/qcom/camss-8x16/camss-vfe.c b/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
index 8ec6ce7..f994b35 100644
--- a/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
@@ -183,13 +183,16 @@
#define VFE_0_DEMUX_EVEN_CFG 0x438
#define VFE_0_DEMUX_ODD_CFG 0x43c

+#define VFE_0_SCALE_ENC_Y_CFG 0x75c
+#define VFE_0_SCALE_ENC_Y_H_IMAGE_SIZE 0x760
+#define VFE_0_SCALE_ENC_Y_H_PHASE 0x764
+#define VFE_0_SCALE_ENC_Y_V_IMAGE_SIZE 0x76c
+#define VFE_0_SCALE_ENC_Y_V_PHASE 0x770
#define VFE_0_SCALE_ENC_CBCR_CFG 0x778
#define VFE_0_SCALE_ENC_CBCR_H_IMAGE_SIZE 0x77c
#define VFE_0_SCALE_ENC_CBCR_H_PHASE 0x780
-#define VFE_0_SCALE_ENC_CBCR_H_PAD 0x78c
#define VFE_0_SCALE_ENC_CBCR_V_IMAGE_SIZE 0x790
#define VFE_0_SCALE_ENC_CBCR_V_PHASE 0x794
-#define VFE_0_SCALE_ENC_CBCR_V_PAD 0x7a0

#define VFE_0_CLAMP_ENC_MAX_CFG 0x874
#define VFE_0_CLAMP_ENC_MIN_CFG 0x878
@@ -645,6 +648,20 @@ static void vfe_set_demux_cfg(struct vfe_device *vfe, struct vfe_line *line)
writel_relaxed(odd_cfg, vfe->base + VFE_0_DEMUX_ODD_CFG);
}

+static inline u8 vfe_calc_interp_reso(u16 input, u16 output)
+{
+ if (input / output >= 16)
+ return 0;
+
+ if (input / output >= 8)
+ return 1;
+
+ if (input / output >= 4)
+ return 2;
+
+ return 3;
+}
+
static void vfe_set_scale_cfg(struct vfe_device *vfe, struct vfe_line *line)
{
u32 p = line->video_out.active_fmt.fmt.pix_mp.pixelformat;
@@ -653,35 +670,51 @@ static void vfe_set_scale_cfg(struct vfe_device *vfe, struct vfe_line *line)
u8 interp_reso;
u32 phase_mult;

+ writel_relaxed(0x3, vfe->base + VFE_0_SCALE_ENC_Y_CFG);
+
+ input = line->fmt[MSM_VFE_PAD_SINK].width;
+ output = line->compose.width;
+ reg = (output << 16) | input;
+ writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_Y_H_IMAGE_SIZE);
+
+ interp_reso = vfe_calc_interp_reso(input, output);
+ phase_mult = input * (1 << (13 + interp_reso)) / output;
+ reg = (interp_reso << 20) | phase_mult;
+ writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_Y_H_PHASE);
+
+ input = line->fmt[MSM_VFE_PAD_SINK].height;
+ output = line->compose.height;
+ reg = (output << 16) | input;
+ writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_Y_V_IMAGE_SIZE);
+
+ interp_reso = vfe_calc_interp_reso(input, output);
+ phase_mult = input * (1 << (13 + interp_reso)) / output;
+ reg = (interp_reso << 20) | phase_mult;
+ writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_Y_V_PHASE);
+
writel_relaxed(0x3, vfe->base + VFE_0_SCALE_ENC_CBCR_CFG);

input = line->fmt[MSM_VFE_PAD_SINK].width;
- output = line->fmt[MSM_VFE_PAD_SRC].width / 2;
+ output = line->compose.width / 2;
reg = (output << 16) | input;
writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_H_IMAGE_SIZE);

- interp_reso = 3;
+ interp_reso = vfe_calc_interp_reso(input, output);
phase_mult = input * (1 << (13 + interp_reso)) / output;
reg = (interp_reso << 20) | phase_mult;
writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_H_PHASE);

- reg = input;
- writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_H_PAD);
-
input = line->fmt[MSM_VFE_PAD_SINK].height;
- output = line->fmt[MSM_VFE_PAD_SRC].height;
+ output = line->compose.height;
if (p == V4L2_PIX_FMT_NV12 || p == V4L2_PIX_FMT_NV21)
- output = line->fmt[MSM_VFE_PAD_SRC].height / 2;
+ output = line->compose.height / 2;
reg = (output << 16) | input;
writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_V_IMAGE_SIZE);

- interp_reso = 3;
+ interp_reso = vfe_calc_interp_reso(input, output);
phase_mult = input * (1 << (13 + interp_reso)) / output;
reg = (interp_reso << 20) | phase_mult;
writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_V_PHASE);
-
- reg = input;
- writel_relaxed(reg, vfe->base + VFE_0_SCALE_ENC_CBCR_V_PAD);
}

static void vfe_set_clamp_cfg(struct vfe_device *vfe)
--
2.7.4
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