/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <drm/drmP.h>
#include "sti_layer.h"
#include "sti_vid.h"
#include "sti_vtg.h"
/* Registers */
#define VID_CTL 0x00
#define VID_ALP 0x04
#define VID_CLF 0x08
#define VID_VPO 0x0C
#define VID_VPS 0x10
#define VID_KEY1 0x28
#define VID_KEY2 0x2C
#define VID_MPR0 0x30
#define VID_MPR1 0x34
#define VID_MPR2 0x38
#define VID_MPR3 0x3C
#define VID_MST 0x68
#define VID_BC 0x70
#define VID_TINT 0x74
#define VID_CSAT 0x78
/* Registers values */
#define VID_CTL_IGNORE (BIT(31) | BIT(30))
#define VID_CTL_PSI_ENABLE (BIT(2) | BIT(1) | BIT(0))
#define VID_ALP_OPAQUE 0x00000080
#define VID_BC_DFLT 0x00008000
#define VID_TINT_DFLT 0x00000000
#define VID_CSAT_DFLT 0x00000080
/* YCbCr to RGB BT709:
* R = Y+1.5391Cr
* G = Y-0.4590Cr-0.1826Cb
* B = Y+1.8125Cb */
#define VID_MPR0_BT709 0x0A800000
#define VID_MPR1_BT709 0x0AC50000
#define VID_MPR2_BT709 0x07150545
#define VID_MPR3_BT709 0x00000AE8
static int sti_vid_prepare_layer(struct sti_layer *vid, bool first_prepare)
{
u32 val;
/* Unmask */
val = readl(vid->regs + VID_CTL);
val &= ~VID_CTL_IGNORE;
writel(val, vid->regs + VID_CTL);
return 0;
}
static int sti_vid_commit_layer(struct sti_layer *vid)
{
struct drm_display_mode *mode = vid->mode;
u32 ydo, xdo, yds, xds;
ydo = sti_vtg_get_line_number(*mode, vid->dst_y);
yds = sti_vtg_get_line_number(*mode, vid->dst_y + vid->dst_h - 1);
xdo = sti_vtg_get_pixel_number(*mode, vid->dst_x);
xds = sti_vtg_get_pixel_number(*mode, vid->dst_x + vid->dst_w - 1);
writel((ydo << 16) | xdo, vid->regs + VID_VPO);
writel((yds << 16) | xds, vid->regs + VID_VPS);
return 0;
}
static int sti_vid_disable_layer(struct sti_layer *vid)
{
u32 val;
/* Mask */
val = readl(vid->regs + VID_CTL);
val |= VID_CTL_IGNORE;
writel(val, vid->regs + VID_CTL);
return 0;
}
static const uint32_t *sti_vid_get_formats(struct sti_layer *layer)
{
return NULL;
}
static unsigned int sti_vid_get_nb_formats(struct sti_layer *layer)
{
return 0;
}
static void sti_vid_init(struct sti_layer *vid)
{
/* Enable PSI, Mask layer */
writel(VID_CTL_PSI_ENABLE | VID_CTL_IGNORE, vid->regs + VID_CTL);
/* Opaque */
writel(VID_ALP_OPAQUE, vid->regs + VID_ALP);
/* Color conversion parameters */
writel(VID_MPR0_BT709, vid->regs + VID_MPR0);
writel(VID_MPR1_BT709, vid->regs + VID_MPR1);
writel(VID_MPR2_BT709, vid->regs + VID_MPR2);
writel(VID_MPR3_BT709, vid->regs + VID_MPR3);
/* Brightness, contrast, tint, saturation */
writel(VID_BC_DFLT, vid->regs + VID_BC);
writel(VID_TINT_DFLT, vid->regs + VID_TINT);
writel(VID_CSAT_DFLT, vid->regs + VID_CSAT);
}
static const struct sti_layer_funcs vid_ops = {
.get_formats = sti_vid_get_formats,
.get_nb_formats = sti_vid_get_nb_formats,
.init = sti_vid_init,
.prepare = sti_vid_prepare_layer,
.commit = sti_vid_commit_layer,
.disable = sti_vid_disable_layer,
};
struct sti_layer *sti_vid_create(struct device *dev)
{
struct sti_layer *vid;
vid = devm_kzalloc(dev, sizeof(*vid), GFP_KERNEL);
if (!vid) {
DRM_ERROR("Failed to allocate memory for VID\n");
return NULL;
}
vid->ops = &vid_ops;
return vid;
}
