diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/sti/sti_vid.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/sti/sti_vid.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/sti/sti_vid.c b/kernel/drivers/gpu/drm/sti/sti_vid.c new file mode 100644 index 000000000..10ced6a47 --- /dev/null +++ b/kernel/drivers/gpu/drm/sti/sti_vid.c @@ -0,0 +1,138 @@ +/* + * 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; +} |