[PATCH 12/27] drm/sun4i: Add basic support for DE3

From: Jernej Skrabec
Date: Sun Sep 02 2018 - 03:28:55 EST

Display Engine 3 is an upgrade of DE2 with new features like support for
10 bit color formats and support for AFBC.

Most of DE2 code works with DE3, except some small details.

Add support for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxx>
---
drivers/gpu/drm/sun4i/sun8i_csc.c | 96 +++++++++++++++++++++++--
drivers/gpu/drm/sun4i/sun8i_mixer.c | 17 ++++-
drivers/gpu/drm/sun4i/sun8i_mixer.h | 21 +++++-
drivers/gpu/drm/sun4i/sun8i_ui_scaler.c | 8 ++-
drivers/gpu/drm/sun4i/sun8i_ui_scaler.h | 1 +
drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 8 +++
drivers/gpu/drm/sun4i/sun8i_vi_layer.h | 2 +
drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 34 ++++++++-
drivers/gpu/drm/sun4i/sun8i_vi_scaler.h | 23 ++++++
9 files changed, 197 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index b14925b40ccf..101901ccf2dc 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -34,6 +34,34 @@ static const u32 yvu2rgb[] = {
0x000004A8, 0x00000000, 0x00000813, 0xFFFBAC4A,
};

+/*
+ * DE3 has a bit different CSC units. Factors are in two's complement format.
+ * First three have 17 bits for fractinal part and last two 2 bits. First
+ * three values in each line are multiplication factor, 4th is difference,
+ * which is subtracted from the input value before the multiplication and
+ * last value is constant, which is added at the end.
+ *
+ * x' = c00 * (x + d0) + c01 * (y + d1) + c02 * (z + d2) + const0
+ * y' = c10 * (x + d0) + c11 * (y + d1) + c12 * (z + d2) + const1
+ * z' = c20 * (x + d0) + c21 * (y + d1) + c22 * (z + d2) + const2
+ *
+ * Please note that above formula is true only for Blender CSC. Other DE3 CSC
+ * units takes only positive value for difference. From what can be deducted
+ * from BSP driver code, those units probably automatically assume that
+ * difference has to be subtracted.
+ */
+static const u32 yuv2rgb_de3[] = {
+ 0x0002542a, 0x00000000, 0x0003312a, 0xffffffc0, 0x00000000,
+ 0x0002542a, 0xffff376b, 0xfffe5fc3, 0xfffffe00, 0x00000000,
+ 0x0002542a, 0x000408d3, 0x00000000, 0xfffffe00, 0x00000000,
+};
+
+static const u32 yvu2rgb_de3[] = {
+ 0x0002542a, 0x0003312a, 0x00000000, 0xffffffc0, 0x00000000,
+ 0x0002542a, 0xfffe5fc3, 0xffff376b, 0xfffffe00, 0x00000000,
+ 0x0002542a, 0x00000000, 0x000408d3, 0xfffffe00, 0x00000000,
+};
+
static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
enum sun8i_csc_mode mode)
{
@@ -61,6 +89,38 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
}
}

+static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
+ enum sun8i_csc_mode mode)
+{
+ const u32 *table;
+ int i, j;
+
+ switch (mode) {
+ case SUN8I_CSC_MODE_YUV2RGB:
+ table = yuv2rgb_de3;
+ break;
+ case SUN8I_CSC_MODE_YVU2RGB:
+ table = yvu2rgb_de3;
+ break;
+ default:
+ DRM_WARN("Wrong CSC mode specified.\n");
+ return;
+ }
+
+ for (i = 0; i < 3; i++) {
+ for (j = 0; j < 3; j++)
+ regmap_write(map,
+ SUN8I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
+ layer, i, j),
+ table[i * 5 + j]);
+ regmap_write(map,
+ SUN8I_MIXER_BLEND_CSC_CONST(DE3_BLD_BASE,
+ layer, i),
+ SUN8I_MIXER_BLEND_CSC_CONST_VAL(table[i * 5 + 3],
+ table[i * 5 + 4]));
+ }
+}
+
static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
{
u32 val;
@@ -73,21 +133,45 @@ static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val);
}

+static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable)
+{
+ u32 val, mask;
+
+ mask = SUN8I_MIXER_BLEND_CSC_CTL_EN(layer);
+
+ if (enable)
+ val = mask;
+ else
+ val = 0;
+
+ regmap_update_bits(map, SUN8I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE),
+ mask, val);
+}
+
void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
enum sun8i_csc_mode mode)
{
- u32 base;
+ if (!mixer->cfg->is_de3) {
+ u32 base;

- base = ccsc_base[mixer->cfg->ccsc][layer];
+ base = ccsc_base[mixer->cfg->ccsc][layer];

- sun8i_csc_set_coefficients(mixer->engine.regs, base, mode);
+ sun8i_csc_set_coefficients(mixer->engine.regs, base, mode);
+ } else {
+ sun8i_de3_ccsc_set_coefficients(mixer->engine.regs,
+ layer, mode);
+ }
}

void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
{
- u32 base;
+ if (!mixer->cfg->is_de3) {
+ u32 base;

- base = ccsc_base[mixer->cfg->ccsc][layer];
+ base = ccsc_base[mixer->cfg->ccsc][layer];

- sun8i_csc_enable(mixer->engine.regs, base, enable);
+ sun8i_csc_enable(mixer->engine.regs, base, enable);
+ } else {
+ sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
+ }
}
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 743941a33d88..a9218abf0935 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -460,8 +460,21 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
base = sun8i_blender_base(mixer);

/* Reset the registers */
- for (i = 0x0; i < 0x20000; i += 4)
- regmap_write(mixer->engine.regs, i, 0);
+ if (mixer->cfg->is_de3) {
+ for (i = 0x0; i < 0x3000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ for (i = 0x20000; i < 0x40000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ for (i = 0x70000; i < 0x88000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ for (i = 0xa0000; i < 0xb0000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ for (i = 0xd0000; i < 0xe0000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ } else {
+ for (i = 0x0; i < 0x20000; i += 4)
+ regmap_write(mixer->engine.regs, i, 0);
+ }

/* Enable the mixer */
regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_CTL,
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 020b0a097c84..4c9a442bbb44 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -33,6 +33,10 @@
#define DE2_CH_BASE 0x2000
#define DE2_CH_SIZE 0x1000

+#define DE3_BLD_BASE 0x0800
+#define DE3_CH_BASE 0x1000
+#define DE3_CH_SIZE 0x0800
+
#define SUN8I_MIXER_BLEND_PIPE_CTL(base) ((base) + 0)
#define SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, x) ((base) + 0x4 + 0x10 * (x))
#define SUN8I_MIXER_BLEND_ATTR_INSIZE(base, x) ((base) + 0x8 + 0x10 * (x))
@@ -47,6 +51,11 @@
#define SUN8I_MIXER_BLEND_CK_MAX(base, x) ((base) + 0xc0 + 0x04 * (x))
#define SUN8I_MIXER_BLEND_CK_MIN(base, x) ((base) + 0xe0 + 0x04 * (x))
#define SUN8I_MIXER_BLEND_OUTCTL(base) ((base) + 0xfc)
+#define SUN8I_MIXER_BLEND_CSC_CTL(base) ((base) + 0x100)
+#define SUN8I_MIXER_BLEND_CSC_COEFF(base, layer, x, y) \
+ ((base) + 0x110 + (layer) * 0x30 + (x) * 0x10 + 4 * (y))
+#define SUN8I_MIXER_BLEND_CSC_CONST(base, layer, i) \
+ ((base) + 0x110 + (layer) * 0x30 + (i) * 0x10 + 0x0c)

#define SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK GENMASK(12, 8)
#define SUN8I_MIXER_BLEND_PIPE_CTL_EN(pipe) BIT(8 + pipe)
@@ -61,6 +70,9 @@

#define SUN8I_MIXER_BLEND_OUTCTL_INTERLACED BIT(1)

+#define SUN8I_MIXER_BLEND_CSC_CTL_EN(ch) BIT(ch)
+#define SUN8I_MIXER_BLEND_CSC_CONST_VAL(d, c) (((d) << 16) | ((c) & 0xffff))
+
#define SUN8I_MIXER_FBFMT_ARGB8888 0
#define SUN8I_MIXER_FBFMT_ABGR8888 1
#define SUN8I_MIXER_FBFMT_RGBA8888 2
@@ -131,6 +143,7 @@ struct de2_fmt_info {
* are invalid.
* @mod_rate: module clock rate that needs to be set in order to have
* a functional block.
+ * @is_de3: true, if this is next gen display engine 3.0, false otherwise.
*/
struct sun8i_mixer_cfg {
int vi_num;
@@ -138,6 +151,7 @@ struct sun8i_mixer_cfg {
int scaler_mask;
int ccsc;
unsigned long mod_rate;
+ bool is_de3;
};

struct sun8i_mixer {
@@ -160,13 +174,16 @@ engine_to_sun8i_mixer(struct sunxi_engine *engine)
static inline u32
sun8i_blender_base(struct sun8i_mixer *mixer)
{
- return DE2_BLD_BASE;
+ return mixer->cfg->is_de3 ? DE3_BLD_BASE : DE2_BLD_BASE;
}

static inline u32
sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
{
- return DE2_CH_BASE + channel * DE2_CH_SIZE;
+ if (mixer->cfg->is_de3)
+ return DE3_CH_BASE + channel * DE3_CH_SIZE;
+ else
+ return DE2_CH_BASE + channel * DE2_CH_SIZE;
}

const struct de2_fmt_info *sun8i_mixer_format_info(u32 format);
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
index c68eab8a748f..2bbeab4b8114 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
@@ -93,8 +93,12 @@ static inline u32 sun8i_ui_scaler_base(struct sun8i_mixer *mixer, int channel)
{
int vi_num = mixer->cfg->vi_num;

- return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * vi_num +
- DE2_UI_SCALER_SIZE * (channel - vi_num);
+ if (mixer->cfg->is_de3)
+ return DE3_VI_SCALER_BASE + DE3_VI_SCALER_SIZE * vi_num +
+ DE3_UI_SCALER_SIZE * (channel - vi_num);
+ else
+ return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * vi_num +
+ DE2_UI_SCALER_SIZE * (channel - vi_num);
}

static int sun8i_ui_scaler_coef_index(unsigned int step)
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h
index 6c3516b75341..3d9b9e3ab9b6 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.h
@@ -12,6 +12,7 @@
#include "sun8i_mixer.h"

#define DE2_UI_SCALER_SIZE 0x10000
+#define DE3_UI_SCALER_SIZE 0x08000

/* this two macros assumes 16 fractional bits which is standard in DRM */
#define SUN8I_UI_SCALER_SCALE_MIN 1
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 79811eae3735..476cf67d6975 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -202,6 +202,14 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE, val);

+ /* It seems that YUV formats use global alpha setting. */
+ if (mixer->cfg->is_de3)
+ regmap_update_bits(mixer->engine.regs,
+ SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base,
+ overlay),
+ SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MASK,
+ SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA(0xff));
+
return 0;
}

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.h b/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
index 46f0237c17bb..3d0ad64178ea 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.h
@@ -30,6 +30,8 @@
#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE BIT(15)
#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_OFFSET 8
#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK GENMASK(12, 8)
+#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MASK GENMASK(31, 24)
+#define SUN8I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA(x) ((x) << 24)

struct sun8i_mixer;

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
index 8697afc36023..22e1ed5cd7a4 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
@@ -835,7 +835,10 @@ static const u32 bicubic4coefftab32[480] = {

static inline u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
{
- return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * channel;
+ if (mixer->cfg->is_de3)
+ return DE3_VI_SCALER_BASE + DE3_VI_SCALER_SIZE * channel;
+ else
+ return DE2_VI_SCALER_BASE + DE2_VI_SCALER_SIZE * channel;
}

static int sun8i_vi_scaler_coef_index(unsigned int step)
@@ -951,6 +954,35 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
cvphase = vphase;
}

+ if (mixer->cfg->is_de3) {
+ u32 val;
+
+ if (format->hsub == 1 && format->vsub == 1)
+ val = SUN8I_SCALER_VSU_SCALE_MODE_UI;
+ else
+ val = SUN8I_SCALER_VSU_SCALE_MODE_NORMAL;
+
+ regmap_write(mixer->engine.regs,
+ SUN8I_SCALER_VSU_SCALE_MODE(base), val);
+
+ regmap_write(mixer->engine.regs,
+ SUN8I_SCALER_VSU_DIR_THR(base),
+ SUN8I_SCALER_VSU_SUB_ZERO_DIR_THR(0) |
+ SUN8I_SCALER_VSU_ZERO_DIR_THR(0) |
+ SUN8I_SCALER_VSU_HORZ_DIR_THR(0xff) |
+ SUN8I_SCALER_VSU_VERT_DIR_THR(1));
+ regmap_write(mixer->engine.regs,
+ SUN8I_SCALER_VSU_EDGE_THR(base),
+ SUN8I_SCALER_VSU_EDGE_SHIFT(8) |
+ SUN8I_SCALER_VSU_EDGE_OFFSET(0));
+ regmap_write(mixer->engine.regs,
+ SUN8I_SCALER_VSU_EDSCL_CTRL(base), 0);
+ regmap_write(mixer->engine.regs,
+ SUN8I_SCALER_VSU_ANGLE_THR(base),
+ SUN8I_SCALER_VSU_ANGLE_SHIFT(2) |
+ SUN8I_SCALER_VSU_ANGLE_OFFSET(0));
+ }
+
regmap_write(mixer->engine.regs,
SUN8I_SCALER_VSU_OUTSIZE(base), outsize);
regmap_write(mixer->engine.regs,
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
index cd015405f66d..c322f5652481 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
@@ -15,6 +15,9 @@
#define DE2_VI_SCALER_BASE 0x20000
#define DE2_VI_SCALER_SIZE 0x20000

+#define DE3_VI_SCALER_BASE 0x20000
+#define DE3_VI_SCALER_SIZE 0x08000
+
/* this two macros assumes 16 fractional bits which is standard in DRM */
#define SUN8I_VI_SCALER_SCALE_MIN 1
#define SUN8I_VI_SCALER_SCALE_MAX ((1UL << 20) - 1)
@@ -25,6 +28,11 @@
#define SUN8I_VI_SCALER_SIZE(w, h) (((h) - 1) << 16 | ((w) - 1))

#define SUN8I_SCALER_VSU_CTRL(base) ((base) + 0x0)
+#define SUN8I_SCALER_VSU_SCALE_MODE(base) ((base) + 0x10)
+#define SUN8I_SCALER_VSU_DIR_THR(base) ((base) + 0x20)
+#define SUN8I_SCALER_VSU_EDGE_THR(base) ((base) + 0x24)
+#define SUN8I_SCALER_VSU_EDSCL_CTRL(base) ((base) + 0x28)
+#define SUN8I_SCALER_VSU_ANGLE_THR(base) ((base) + 0x2c)
#define SUN8I_SCALER_VSU_OUTSIZE(base) ((base) + 0x40)
#define SUN8I_SCALER_VSU_YINSIZE(base) ((base) + 0x80)
#define SUN8I_SCALER_VSU_YHSTEP(base) ((base) + 0x88)
@@ -46,6 +54,21 @@
#define SUN8I_SCALER_VSU_CTRL_EN BIT(0)
#define SUN8I_SCALER_VSU_CTRL_COEFF_RDY BIT(4)

+#define SUN8I_SCALER_VSU_SUB_ZERO_DIR_THR(x) (((x) << 24) & 0xFF)
+#define SUN8I_SCALER_VSU_ZERO_DIR_THR(x) (((x) << 16) & 0xFF)
+#define SUN8I_SCALER_VSU_HORZ_DIR_THR(x) (((x) << 8) & 0xFF)
+#define SUN8I_SCALER_VSU_VERT_DIR_THR(x) ((x) & 0xFF)
+
+#define SUN8I_SCALER_VSU_SCALE_MODE_UI 0
+#define SUN8I_SCALER_VSU_SCALE_MODE_NORMAL 1
+#define SUN8I_SCALER_VSU_SCALE_MODE_ED_SCALE 2
+
+#define SUN8I_SCALER_VSU_EDGE_SHIFT(x) (((x) << 16) & 0xF)
+#define SUN8I_SCALER_VSU_EDGE_OFFSET(x) ((x) & 0xFF)
+
+#define SUN8I_SCALER_VSU_ANGLE_SHIFT(x) (((x) << 16) & 0xF)
+#define SUN8I_SCALER_VSU_ANGLE_OFFSET(x) ((x) & 0xFF)
+
void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable);
void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
u32 src_w, u32 src_h, u32 dst_w, u32 dst_h,
--
2.18.0