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drm/rockchip: vop: Support dithering to RGB666

Browse source 
Splits out the dither register bits and introduces
the same config enumerations as in the rockchip kernel tree.
Tested to fix the banding on my ASUS C201.

Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20190318154412.26994-1-urjaman@gmail.com
This commit is contained in:
Urja Rannikko 2019-03-18 15:44:12 +00:00 committed by Heiko Stuebner
parent 530b28426a
commit a5c0fa44e9
3 changed files with 41 additions and 4 deletions
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11
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
View file

@ -1029,6 +1029,7 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
u16 vact_st = adjusted_mode->vtotal - adjusted_mode->vsync_start;
u16 vact_end = vact_st + vdisplay;
uint32_t pin_pol, val;
int dither_bpc = s->output_bpc ? s->output_bpc : 10;
int ret;
mutex_lock(&vop->vop_lock);
@ -1086,11 +1087,19 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
!(vop_data->feature & VOP_FEATURE_OUTPUT_RGB10))
s->output_mode = ROCKCHIP_OUT_MODE_P888;
if (s->output_mode == ROCKCHIP_OUT_MODE_AAAA && s->output_bpc == 8)
if (s->output_mode == ROCKCHIP_OUT_MODE_AAAA && dither_bpc <= 8)
VOP_REG_SET(vop, common, pre_dither_down, 1);
else
VOP_REG_SET(vop, common, pre_dither_down, 0);
if (dither_bpc == 6) {
VOP_REG_SET(vop, common, dither_down_sel, DITHER_DOWN_ALLEGRO);
VOP_REG_SET(vop, common, dither_down_mode, RGB888_TO_RGB666);
VOP_REG_SET(vop, common, dither_down_en, 1);
} else {
VOP_REG_SET(vop, common, dither_down_en, 0);
}
VOP_REG_SET(vop, common, out_mode, s->output_mode);
VOP_REG_SET(vop, modeset, htotal_pw, (htotal << 16) | hsync_len);

14
drivers/gpu/drm/rockchip/rockchip_drm_vop.h
View file

@ -71,7 +71,9 @@ struct vop_common {
struct vop_reg dsp_blank;
struct vop_reg data_blank;
struct vop_reg pre_dither_down;
struct vop_reg dither_down;
struct vop_reg dither_down_sel;
struct vop_reg dither_down_mode;
struct vop_reg dither_down_en;
struct vop_reg dither_up;
struct vop_reg gate_en;
struct vop_reg mmu_en;
@ -287,6 +289,16 @@ enum scale_down_mode {
SCALE_DOWN_AVG = 0x1
};
enum dither_down_mode {
RGB888_TO_RGB565 = 0x0,
RGB888_TO_RGB666 = 0x1
};
enum dither_down_mode_sel {
DITHER_DOWN_ALLEGRO = 0x0,
DITHER_DOWN_FRC = 0x1
};
enum vop_pol {
HSYNC_POSITIVE = 0,
VSYNC_POSITIVE = 1,

20
drivers/gpu/drm/rockchip/rockchip_vop_reg.c
View file

@ -137,6 +137,9 @@ static const struct vop_common rk3036_common = {
.standby = VOP_REG_SYNC(RK3036_SYS_CTRL, 0x1, 30),
.out_mode = VOP_REG(RK3036_DSP_CTRL0, 0xf, 0),
.dsp_blank = VOP_REG(RK3036_DSP_CTRL1, 0x1, 24),
.dither_down_sel = VOP_REG(RK3036_DSP_CTRL0, 0x1, 27),
.dither_down_en = VOP_REG(RK3036_DSP_CTRL0, 0x1, 11),
.dither_down_mode = VOP_REG(RK3036_DSP_CTRL0, 0x1, 10),
.cfg_done = VOP_REG_SYNC(RK3036_REG_CFG_DONE, 0x1, 0),
};
@ -200,6 +203,9 @@ static const struct vop_common px30_common = {
.standby = VOP_REG_SYNC(PX30_SYS_CTRL2, 0x1, 1),
.out_mode = VOP_REG(PX30_DSP_CTRL2, 0xf, 16),
.dsp_blank = VOP_REG(PX30_DSP_CTRL2, 0x1, 14),
.dither_down_en = VOP_REG(PX30_DSP_CTRL2, 0x1, 8),
.dither_down_sel = VOP_REG(PX30_DSP_CTRL2, 0x1, 7),
.dither_down_mode = VOP_REG(PX30_DSP_CTRL2, 0x1, 6),
.cfg_done = VOP_REG_SYNC(PX30_REG_CFG_DONE, 0x1, 0),
};
@ -365,6 +371,8 @@ static const struct vop_common rk3066_common = {
.standby = VOP_REG(RK3066_SYS_CTRL0, 0x1, 1),
.out_mode = VOP_REG(RK3066_DSP_CTRL0, 0xf, 0),
.cfg_done = VOP_REG(RK3066_REG_CFG_DONE, 0x1, 0),
.dither_down_en = VOP_REG(RK3066_DSP_CTRL0, 0x1, 11),
.dither_down_mode = VOP_REG(RK3066_DSP_CTRL0, 0x1, 10),
.dsp_blank = VOP_REG(RK3066_DSP_CTRL1, 0x1, 24),
};
@ -458,6 +466,9 @@ static const struct vop_common rk3188_common = {
.standby = VOP_REG(RK3188_SYS_CTRL, 0x1, 30),
.out_mode = VOP_REG(RK3188_DSP_CTRL0, 0xf, 0),
.cfg_done = VOP_REG(RK3188_REG_CFG_DONE, 0x1, 0),
.dither_down_sel = VOP_REG(RK3188_DSP_CTRL0, 0x1, 27),
.dither_down_en = VOP_REG(RK3188_DSP_CTRL0, 0x1, 11),
.dither_down_mode = VOP_REG(RK3188_DSP_CTRL0, 0x1, 10),
.dsp_blank = VOP_REG(RK3188_DSP_CTRL1, 0x3, 24),
};
@ -585,8 +596,10 @@ static const struct vop_common rk3288_common = {
.standby = VOP_REG_SYNC(RK3288_SYS_CTRL, 0x1, 22),
.gate_en = VOP_REG(RK3288_SYS_CTRL, 0x1, 23),
.mmu_en = VOP_REG(RK3288_SYS_CTRL, 0x1, 20),
.dither_down_sel = VOP_REG(RK3288_DSP_CTRL1, 0x1, 4),
.dither_down_mode = VOP_REG(RK3288_DSP_CTRL1, 0x1, 3),
.dither_down_en = VOP_REG(RK3288_DSP_CTRL1, 0x1, 2),
.pre_dither_down = VOP_REG(RK3288_DSP_CTRL1, 0x1, 1),
.dither_down = VOP_REG(RK3288_DSP_CTRL1, 0xf, 1),
.dither_up = VOP_REG(RK3288_DSP_CTRL1, 0x1, 6),
.data_blank = VOP_REG(RK3288_DSP_CTRL0, 0x1, 19),
.dsp_blank = VOP_REG(RK3288_DSP_CTRL0, 0x3, 18),
@ -878,7 +891,10 @@ static const struct vop_misc rk3328_misc = {
static const struct vop_common rk3328_common = {
.standby = VOP_REG_SYNC(RK3328_SYS_CTRL, 0x1, 22),
.dither_down = VOP_REG(RK3328_DSP_CTRL1, 0xf, 1),
.dither_down_sel = VOP_REG(RK3328_DSP_CTRL1, 0x1, 4),
.dither_down_mode = VOP_REG(RK3328_DSP_CTRL1, 0x1, 3),
.dither_down_en = VOP_REG(RK3328_DSP_CTRL1, 0x1, 2),
.pre_dither_down = VOP_REG(RK3328_DSP_CTRL1, 0x1, 1),
.dither_up = VOP_REG(RK3328_DSP_CTRL1, 0x1, 6),
.dsp_blank = VOP_REG(RK3328_DSP_CTRL0, 0x3, 18),
.out_mode = VOP_REG(RK3328_DSP_CTRL0, 0xf, 0),