On Thu, May 29, 2014 at 2:37 AM, Benjamin Gaignard benjamin.gaignard@linaro.org wrote:
Mixer hardware IP is responsible of mixing the different inputs layers. Z-order is managed by the mixer. We could 2 mixers: one for main path and one for auxillary path
Mixers are part of Compositor hardware block
Signed-off-by: Benjamin Gaignard benjamin.gaignard@linaro.org
drivers/gpu/drm/sti/Makefile | 1 + drivers/gpu/drm/sti/sti_mixer.c | 243 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/sti/sti_mixer.h | 52 +++++++++ 3 files changed, 296 insertions(+) create mode 100644 drivers/gpu/drm/sti/sti_mixer.c create mode 100644 drivers/gpu/drm/sti/sti_mixer.h
diff --git a/drivers/gpu/drm/sti/Makefile b/drivers/gpu/drm/sti/Makefile index bb0f6b3..ce03e15 100644 --- a/drivers/gpu/drm/sti/Makefile +++ b/drivers/gpu/drm/sti/Makefile @@ -6,5 +6,6 @@ obj-$(CONFIG_DRM_STI) += \ sti_hdmi_tx3g4c28phy.o \ sti_hda.o \ sti_tvout.o \
sti_mixer.o \ sti_gdp.o \ sti_vid.o
\ No newline at end of file diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c new file mode 100644 index 0000000..c812c68 --- /dev/null +++ b/drivers/gpu/drm/sti/sti_mixer.c @@ -0,0 +1,243 @@ +/*
- 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_mixer.h" +#include "sti_vtg.h"
+/* Identity: G=Y , B=Cb , R=Cr */ +static const u32 MixerColorSpaceMatIdentity[] = {
minor nit: CamelCase..
BR, -R
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)
+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:
layer_id = GAM_DEPTH_VID0_ID;
break;
case STI_VID_1:
layer_id = GAM_DEPTH_VID1_ID;
break;
default:
DRM_ERROR("Unknown layer %d\n", layer->desc);
return 1;
}
mask = GAM_DEPTH_MASK_ID << (3 * depth);
layer_id = layer_id << (3 * 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:
return GAM_CTL_VID0_MASK;
case STI_VID_1:
return GAM_CTL_VID1_MASK;
default:
return 0;
}
+}
+int sti_mixer_set_layer_status(struct sti_mixer *mixer,
struct sti_layer *layer, bool status)
+{
u32 mask, val;
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_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;
+} diff --git a/drivers/gpu/drm/sti/sti_mixer.h b/drivers/gpu/drm/sti/sti_mixer.h new file mode 100644 index 0000000..2d86378 --- /dev/null +++ b/drivers/gpu/drm/sti/sti_mixer.h @@ -0,0 +1,52 @@ +/*
- 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
- */
+#ifndef _STI_MIXER_H_ +#define _STI_MIXER_H_
+#include <drm/drmP.h>
+#include "sti_layer.h"
+#define to_sti_mixer(x) container_of(x, struct sti_mixer, drm_crtc)
+/**
- STI Mixer subdevice structure
- @dev: driver device
- @regs: mixer registers
- @id: id of the mixer
- @drm_crtc: crtc object link to the mixer
- */
+struct sti_mixer {
struct device *dev;
void __iomem *regs;
int id;
struct drm_crtc drm_crtc;
+};
+const char *sti_mixer_to_str(struct sti_mixer *mixer);
+struct sti_mixer *sti_mixer_create(struct device *dev, int id,
void __iomem *baseaddr);
+int sti_mixer_set_layer_status(struct sti_mixer *mixer,
struct sti_layer *layer, bool status);
+int sti_mixer_set_layer_depth(struct sti_mixer *mixer, struct sti_layer *layer); +int sti_mixer_active_video_area(struct sti_mixer *mixer,
struct drm_display_mode *mode);
+void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable);
+/* depth in Cross-bar control = z order */ +#define GAM_MIXER_NB_DEPTH_LEVEL 7
+#define STI_MIXER_MAIN 0 +#define STI_MIXER_AUX 1
+#endif
1.9.1
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