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 auxilary path
Signed-off-by: Benjamin Gaignard benjamin.gaignard@linaro.org Signed-off-by: Vincent Abriou vincent.abriou@st.com Signed-off-by: Fabien Dessenne fabien.dessenne@st.com --- drivers/gpu/drm/sti/Makefile | 1 + drivers/gpu/drm/sti/sti_mixer.c | 241 ++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/sti/sti_mixer.h | 52 +++++++++ 3 files changed, 294 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 b9a3b74..3d52d2a 100644 --- a/drivers/gpu/drm/sti/Makefile +++ b/drivers/gpu/drm/sti/Makefile @@ -5,6 +5,7 @@ stidrm-y := sti_tvout.o \ sti_hdmi_tx3g0c55phy.o \ sti_hdmi_tx3g4c28phy.o \ sti_hda.o \ + sti_mixer.o \ sti_gdp.o \ sti_vid.o \ sti_ddc.o diff --git a/drivers/gpu/drm/sti/sti_mixer.c b/drivers/gpu/drm/sti/sti_mixer.c new file mode 100644 index 0000000..ab8daf6 --- /dev/null +++ b/drivers/gpu/drm/sti/sti_mixer.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) STMicroelectronics SA 2013 + * 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_utils.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_MAIN_CTL 0x00 +#define GAM_MIXER_MAIN_BKC 0x04 +#define GAM_MIXER_MAIN_BCO 0x0C +#define GAM_MIXER_MAIN_BCS 0x10 +#define GAM_MIXER_MAIN_AVO 0x28 +#define GAM_MIXER_MAIN_AVS 0x2C +#define GAM_MIXER_MAIN_CRB 0x34 +#define GAM_MIXER_MAIN_ACT 0x38 +#define GAM_MIXER_MAIN_MBP 0x3C +#define GAM_MIXER_MAIN_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 (1 << 0) +#define GAM_CTL_VID0_MASK (1 << 1) +#define GAM_CTL_VID1_MASK (1 << 2) +#define GAM_CTL_GDP0_MASK (1 << 3) +#define GAM_CTL_GDP1_MASK (1 << 4) +#define GAM_CTL_GDP2_MASK (1 << 5) +#define GAM_CTL_GDP3_MASK (1 << 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); +} + +static inline void sti_mixer_reg_writemask(struct sti_mixer *mixer, + u32 reg_id, u32 val, u32 mask) +{ + u32 old = sti_mixer_reg_read(mixer, reg_id); + + val = (val & mask) | (old & ~mask); + writel(val, mixer->regs + reg_id); +} + +void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable) +{ + sti_mixer_reg_writemask(mixer, + GAM_MIXER_MAIN_CTL, enable, GAM_CTL_BACK_MASK); +} + +static void sti_mixer_set_background_color(struct sti_mixer *mixer, + int red, int green, int blue) +{ + u32 val = (red << 16) | (green << 8) | blue; + + sti_mixer_reg_write(mixer, GAM_MIXER_MAIN_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_MAIN_BCO, ydo << 16 | xdo); + sti_mixer_reg_write(mixer, GAM_MIXER_MAIN_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; + + 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_MAIN_CRB val 0x%x mask 0x%x\n", + layer_id, mask); + sti_mixer_reg_writemask(mixer, GAM_MIXER_MAIN_CRB, layer_id, mask); + + dev_dbg(mixer->dev, "Read GAM_MIXER_MAIN_CRB 0x%x\n", + sti_mixer_reg_read(mixer, GAM_MIXER_MAIN_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_MAIN_AVO, ydo << 16 | xdo); + sti_mixer_reg_write(mixer, GAM_MIXER_MAIN_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 -1; + } + val = status ? mask : 0; + sti_mixer_reg_writemask(mixer, GAM_MIXER_MAIN_CTL, val, mask); + return 0; +} + +void sti_mixer_set_matrix(struct sti_mixer *mixer) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(MixerColorSpaceMatIdentity); i++) + sti_mixer_reg_write(mixer, GAM_MIXER_MAIN_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..a05e21f --- /dev/null +++ b/drivers/gpu/drm/sti/sti_mixer.h @@ -0,0 +1,52 @@ +/* + * Copyright (C) STMicroelectronics SA 2013 + * 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