From: Shawn Guo <shawn....@linaro.org>
It adds interlace mode support in VOU TIMING_CTRL and channel control
block, so that VOU driver gets ready to support output device in
interlace mode like TV Encoder.
Signed-off-by: Shawn Guo <shawn....@linaro.org>
---
Changes for v2:
- Save the use of variable 'vactive' by checking interlaced case.
- Rename mask variable for scan register to avoid naming scope
confusion.
- Write a proper comment to explain how vback_porch of the first
and second field are related.
drivers/gpu/drm/zte/zx_vou.c | 52 +++++++++++++++++++++++++++++++++++++--
drivers/gpu/drm/zte/zx_vou_regs.h | 15 +++++++++++
2 files changed, 65 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/zte/zx_vou.c b/drivers/gpu/drm/zte/zx_vou.c
index 3056b41df518..fe066e0f3df4 100644
--- a/drivers/gpu/drm/zte/zx_vou.c
+++ b/drivers/gpu/drm/zte/zx_vou.c
@@ -40,6 +40,7 @@ struct zx_crtc_regs {
u32 fir_active;
u32 fir_htiming;
u32 fir_vtiming;
+ u32 sec_vtiming;
u32 timing_shift;
u32 timing_pi_shift;
};
@@ -48,6 +49,7 @@ struct zx_crtc_regs {
.fir_active = FIR_MAIN_ACTIVE,
.fir_htiming = FIR_MAIN_H_TIMING,
.fir_vtiming = FIR_MAIN_V_TIMING,
+ .sec_vtiming = SEC_MAIN_V_TIMING,
.timing_shift = TIMING_MAIN_SHIFT,
.timing_pi_shift = TIMING_MAIN_PI_SHIFT,
};
@@ -56,6 +58,7 @@ struct zx_crtc_regs {
.fir_active = FIR_AUX_ACTIVE,
.fir_htiming = FIR_AUX_H_TIMING,
.fir_vtiming = FIR_AUX_V_TIMING,
+ .sec_vtiming = SEC_AUX_V_TIMING,
.timing_shift = TIMING_AUX_SHIFT,
.timing_pi_shift = TIMING_AUX_PI_SHIFT,
};
@@ -65,6 +68,10 @@ struct zx_crtc_bits {
u32 polarity_shift;
u32 int_frame_mask;
u32 tc_enable;
+ u32 sec_vactive_shift;
+ u32 sec_vactive_mask;
+ u32 interlace_select;
+ u32 pi_enable;
};
static const struct zx_crtc_bits main_crtc_bits = {
@@ -72,6 +79,10 @@ struct zx_crtc_bits {
.polarity_shift = MAIN_POL_SHIFT,
.int_frame_mask = TIMING_INT_MAIN_FRAME,
.tc_enable = MAIN_TC_EN,
+ .sec_vactive_shift = SEC_VACT_MAIN_SHIFT,
+ .sec_vactive_mask = SEC_VACT_MAIN_MASK,
+ .interlace_select = MAIN_INTERLACE_SEL,
+ .pi_enable = MAIN_PI_EN,
};
static const struct zx_crtc_bits aux_crtc_bits = {
@@ -79,6 +90,10 @@ struct zx_crtc_bits {
.polarity_shift = AUX_POL_SHIFT,
.int_frame_mask = TIMING_INT_AUX_FRAME,
.tc_enable = AUX_TC_EN,
+ .sec_vactive_shift = SEC_VACT_AUX_SHIFT,
+ .sec_vactive_mask = SEC_VACT_AUX_MASK,
+ .interlace_select = AUX_INTERLACE_SEL,
+ .pi_enable = AUX_PI_EN,
};
struct zx_crtc {
@@ -196,11 +211,13 @@ static inline void vou_chn_set_update(struct zx_crtc
*zcrtc)
static void zx_crtc_enable(struct drm_crtc *crtc)
{
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
struct zx_crtc *zcrtc = to_zx_crtc(crtc);
struct zx_vou_hw *vou = zcrtc->vou;
const struct zx_crtc_regs *regs = zcrtc->regs;
const struct zx_crtc_bits *bits = zcrtc->bits;
struct videomode vm;
+ u32 scan_mask;
u32 pol = 0;
u32 val;
int ret;
@@ -208,7 +225,7 @@ static void zx_crtc_enable(struct drm_crtc *crtc)
drm_display_mode_to_videomode(mode, &vm);
/* Set up timing parameters */
- val = V_ACTIVE(vm.vactive - 1);
+ val = V_ACTIVE((interlaced ? vm.vactive / 2 : vm.vactive) - 1);
val |= H_ACTIVE(vm.hactive - 1);
zx_writel(vou->timing + regs->fir_active, val);
@@ -222,6 +239,25 @@ static void zx_crtc_enable(struct drm_crtc *crtc)
val |= FRONT_PORCH(vm.vfront_porch - 1);
zx_writel(vou->timing + regs->fir_vtiming, val);
+ if (interlaced) {
+ u32 shift = bits->sec_vactive_shift;
+ u32 mask = bits->sec_vactive_mask;
+
+ val = zx_readl(vou->timing + SEC_V_ACTIVE);
+ val &= ~mask;
+ val |= ((vm.vactive / 2 - 1) << shift) & mask;
+ zx_writel(vou->timing + SEC_V_ACTIVE, val);
+
+ val = SYNC_WIDE(vm.vsync_len - 1);
+ /*
+ * The vback_porch for the second field needs to shift one on
+ * the value for the first field.
+ */
+ val |= BACK_PORCH(vm.vback_porch);
+ val |= FRONT_PORCH(vm.vfront_porch - 1);
+ zx_writel(vou->timing + regs->sec_vtiming, val);
+ }
+
/* Set up polarities */
if (vm.flags & DISPLAY_FLAGS_VSYNC_LOW)
pol |= 1 << POL_VSYNC_SHIFT;
@@ -232,9 +268,17 @@ static void zx_crtc_enable(struct drm_crtc *crtc)
pol << bits->polarity_shift);
/* Setup SHIFT register by following what ZTE BSP does */
- zx_writel(vou->timing + regs->timing_shift, H_SHIFT_VAL);
+ val = H_SHIFT_VAL;
+ if (interlaced)
+ val |= V_SHIFT_VAL << 16;
+ zx_writel(vou->timing + regs->timing_shift, val);
zx_writel(vou->timing + regs->timing_pi_shift, H_PI_SHIFT_VAL);
+ /* Progressive or interlace scan select */
+ scan_mask = bits->interlace_select | bits->pi_enable;
+ zx_writel_mask(vou->timing + SCAN_CTRL, scan_mask,
+ interlaced ? scan_mask : 0);
+
/* Enable TIMING_CTRL */
zx_writel_mask(vou->timing + TIMING_TC_ENABLE, bits->tc_enable,
bits->tc_enable);
@@ -245,6 +289,10 @@ static void zx_crtc_enable(struct drm_crtc *crtc)
zx_writel_mask(zcrtc->chnreg + CHN_CTRL1, CHN_SCREEN_H_MASK,
vm.vactive << CHN_SCREEN_H_SHIFT);
+ /* Configure channel interlace buffer control */
+ zx_writel_mask(zcrtc->chnreg + CHN_INTERLACE_BUF_CTRL, CHN_INTERLACE_EN,
+ interlaced ? CHN_INTERLACE_EN : 0);
+
/* Update channel */
vou_chn_set_update(zcrtc);
diff --git a/drivers/gpu/drm/zte/zx_vou_regs.h
b/drivers/gpu/drm/zte/zx_vou_regs.h
index 193c1ce01fe7..e6ed844e068a 100644
--- a/drivers/gpu/drm/zte/zx_vou_regs.h
+++ b/drivers/gpu/drm/zte/zx_vou_regs.h
@@ -75,6 +75,8 @@
#define CHN_SCREEN_H_SHIFT 5
#define CHN_SCREEN_H_MASK (0x1fff << CHN_SCREEN_H_SHIFT)
#define CHN_UPDATE 0x08
+#define CHN_INTERLACE_BUF_CTRL 0x24
+#define CHN_INTERLACE_EN BIT(2)
/* TIMING_CTRL registers */
#define TIMING_TC_ENABLE 0x04
@@ -117,6 +119,19 @@
#define TIMING_MAIN_SHIFT 0x2c
#define TIMING_AUX_SHIFT 0x30
#define H_SHIFT_VAL 0x0048
+#define V_SHIFT_VAL 0x0001
+#define SCAN_CTRL 0x34
+#define AUX_PI_EN BIT(19)
+#define MAIN_PI_EN BIT(18)
+#define AUX_INTERLACE_SEL BIT(1)
+#define MAIN_INTERLACE_SEL BIT(0)
+#define SEC_V_ACTIVE 0x38
+#define SEC_VACT_MAIN_SHIFT 0
+#define SEC_VACT_MAIN_MASK (0xffff << SEC_VACT_MAIN_SHIFT)
+#define SEC_VACT_AUX_SHIFT 16
+#define SEC_VACT_AUX_MASK (0xffff << SEC_VACT_AUX_SHIFT)
+#define SEC_MAIN_V_TIMING 0x3c
+#define SEC_AUX_V_TIMING 0x40
#define TIMING_MAIN_PI_SHIFT 0x68
#define TIMING_AUX_PI_SHIFT 0x6c
#define H_PI_SHIFT_VAL 0x000f
--
1.9.1
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