| Message ID | 1401345427-5299-10-git-send-email-benjamin.gaignard@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel
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[] = { + 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
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