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linux/drivers/gpu/drm/sti/sti_mixer.c
Benjamin Gaignard 4fdbc678fe drm: sti: add HQVDP plane 
High Quality Video Data Plane is hardware IP dedicated
to video rendering. Compare to GPD (graphic planes) it
have better scaler capabilities.

HQVDP use VID layer to push data into hardware compositor
without going into DDR. From data flow point of view HQVDP
and VID are nested so HQVPD update/disable VID.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
2014-12-11 14:00:13 +01:00

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/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
* Fabien Dessenne <fabien.dessenne@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include "sti_compositor.h"
#include "sti_mixer.h"
#include "sti_vtg.h"
/* Identity: G=Y , B=Cb , R=Cr */
static const u32 mixerColorSpaceMatIdentity[] = {
0x10000000, 0x00000000, 0x10000000, 0x00001000,
0x00000000, 0x00000000, 0x00000000, 0x00000000
};
/* regs offset */
#define GAM_MIXER_CTL 0x00
#define GAM_MIXER_BKC 0x04
#define GAM_MIXER_BCO 0x0C
#define GAM_MIXER_BCS 0x10
#define GAM_MIXER_AVO 0x28
#define GAM_MIXER_AVS 0x2C
#define GAM_MIXER_CRB 0x34
#define GAM_MIXER_ACT 0x38
#define GAM_MIXER_MBP 0x3C
#define GAM_MIXER_MX0 0x80
/* id for depth of CRB reg */
#define GAM_DEPTH_VID0_ID 1
#define GAM_DEPTH_VID1_ID 2
#define GAM_DEPTH_GDP0_ID 3
#define GAM_DEPTH_GDP1_ID 4
#define GAM_DEPTH_GDP2_ID 5
#define GAM_DEPTH_GDP3_ID 6
#define GAM_DEPTH_MASK_ID 7
/* mask in CTL reg */
#define GAM_CTL_BACK_MASK BIT(0)
#define GAM_CTL_VID0_MASK BIT(1)
#define GAM_CTL_VID1_MASK BIT(2)
#define GAM_CTL_GDP0_MASK BIT(3)
#define GAM_CTL_GDP1_MASK BIT(4)
#define GAM_CTL_GDP2_MASK BIT(5)
#define GAM_CTL_GDP3_MASK BIT(6)
#define GAM_CTL_CURSOR_MASK BIT(9)
const char *sti_mixer_to_str(struct sti_mixer *mixer)
{
switch (mixer->id) {
case STI_MIXER_MAIN:
return "MAIN_MIXER";
case STI_MIXER_AUX:
return "AUX_MIXER";
default:
return "<UNKNOWN MIXER>";
}
}
static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id)
{
return readl(mixer->regs + reg_id);
}
static inline void sti_mixer_reg_write(struct sti_mixer *mixer,
u32 reg_id, u32 val)
{
writel(val, mixer->regs + reg_id);
}
void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
{
u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
val &= ~GAM_CTL_BACK_MASK;
val |= enable;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
}
static void sti_mixer_set_background_color(struct sti_mixer *mixer,
u8 red, u8 green, u8 blue)
{
u32 val = (red << 16) | (green << 8) | blue;
sti_mixer_reg_write(mixer, GAM_MIXER_BKC, val);
}
static void sti_mixer_set_background_area(struct sti_mixer *mixer,
struct drm_display_mode *mode)
{
u32 ydo, xdo, yds, xds;
ydo = sti_vtg_get_line_number(*mode, 0);
yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
xdo = sti_vtg_get_pixel_number(*mode, 0);
xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo);
sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds);
}
int sti_mixer_set_layer_depth(struct sti_mixer *mixer, struct sti_layer *layer)
{
int layer_id = 0, depth = layer->zorder;
u32 mask, val;
if (depth >= GAM_MIXER_NB_DEPTH_LEVEL)
return 1;
switch (layer->desc) {
case STI_GDP_0:
layer_id = GAM_DEPTH_GDP0_ID;
break;
case STI_GDP_1:
layer_id = GAM_DEPTH_GDP1_ID;
break;
case STI_GDP_2:
layer_id = GAM_DEPTH_GDP2_ID;
break;
case STI_GDP_3:
layer_id = GAM_DEPTH_GDP3_ID;
break;
case STI_VID_0:
case STI_HQVDP_0:
layer_id = GAM_DEPTH_VID0_ID;
break;
case STI_VID_1:
layer_id = GAM_DEPTH_VID1_ID;
break;
case STI_CURSOR:
/* no need to set depth for cursor */
return 0;
default:
DRM_ERROR("Unknown layer %d\n", layer->desc);
return 1;
}
mask = GAM_DEPTH_MASK_ID << (3 * depth);
layer_id = layer_id << (3 * depth);
DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
sti_layer_to_str(layer), depth);
dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
layer_id, mask);
val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
val &= ~mask;
val |= layer_id;
sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
return 0;
}
int sti_mixer_active_video_area(struct sti_mixer *mixer,
struct drm_display_mode *mode)
{
u32 ydo, xdo, yds, xds;
ydo = sti_vtg_get_line_number(*mode, 0);
yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
xdo = sti_vtg_get_pixel_number(*mode, 0);
xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n",
sti_mixer_to_str(mixer), xdo, ydo, xds, yds);
sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
sti_mixer_set_background_color(mixer, 0xFF, 0, 0);
sti_mixer_set_background_area(mixer, mode);
sti_mixer_set_background_status(mixer, true);
return 0;
}
static u32 sti_mixer_get_layer_mask(struct sti_layer *layer)
{
switch (layer->desc) {
case STI_BACK:
return GAM_CTL_BACK_MASK;
case STI_GDP_0:
return GAM_CTL_GDP0_MASK;
case STI_GDP_1:
return GAM_CTL_GDP1_MASK;
case STI_GDP_2:
return GAM_CTL_GDP2_MASK;
case STI_GDP_3:
return GAM_CTL_GDP3_MASK;
case STI_VID_0:
case STI_HQVDP_0:
return GAM_CTL_VID0_MASK;
case STI_VID_1:
return GAM_CTL_VID1_MASK;
case STI_CURSOR:
return GAM_CTL_CURSOR_MASK;
default:
return 0;
}
}
int sti_mixer_set_layer_status(struct sti_mixer *mixer,
struct sti_layer *layer, bool status)
{
u32 mask, val;
DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable",
sti_mixer_to_str(mixer), sti_layer_to_str(layer));
mask = sti_mixer_get_layer_mask(layer);
if (!mask) {
DRM_ERROR("Can not find layer mask\n");
return -EINVAL;
}
val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
val &= ~mask;
val |= status ? mask : 0;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
return 0;
}
void sti_mixer_clear_all_layers(struct sti_mixer *mixer)
{
u32 val;
DRM_DEBUG_DRIVER("%s clear all layer\n", sti_mixer_to_str(mixer));
val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL) & 0xFFFF0000;
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
}
void sti_mixer_set_matrix(struct sti_mixer *mixer)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(mixerColorSpaceMatIdentity); i++)
sti_mixer_reg_write(mixer, GAM_MIXER_MX0 + (i * 4),
mixerColorSpaceMatIdentity[i]);
}
struct sti_mixer *sti_mixer_create(struct device *dev, int id,
void __iomem *baseaddr)
{
struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
struct device_node *np = dev->of_node;
dev_dbg(dev, "%s\n", __func__);
if (!mixer) {
DRM_ERROR("Failed to allocated memory for mixer\n");
return NULL;
}
mixer->regs = baseaddr;
mixer->dev = dev;
mixer->id = id;
if (of_device_is_compatible(np, "st,stih416-compositor"))
sti_mixer_set_matrix(mixer);
DRM_DEBUG_DRIVER("%s created. Regs=%p\n",
sti_mixer_to_str(mixer), mixer->regs);
return mixer;
}
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