[PATCH v4 07/11] drm: sti: add GDP layer
Rob Clark
robdclark at gmail.com
Wed Jun 11 12:15:28 PDT 2014
On Thu, May 29, 2014 at 2:37 AM, Benjamin Gaignard
<benjamin.gaignard at linaro.org> wrote:
> Generic Display Pipeline are one of the compositor input sub-devices.
> GDP are dedicated to graphic input like RGB plans.
> GDP is part of Compositor hardware block which will be introduce later.
>
> A sti_layer structure is used to abstract GDP calls from Compositor.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>
> ---
> drivers/gpu/drm/sti/Makefile | 3 +-
> drivers/gpu/drm/sti/sti_gdp.c | 482 ++++++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/sti/sti_gdp.h | 73 ++++++
> drivers/gpu/drm/sti/sti_layer.h | 111 +++++++++
> 4 files changed, 668 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/sti/sti_gdp.c
> create mode 100644 drivers/gpu/drm/sti/sti_gdp.h
> create mode 100644 drivers/gpu/drm/sti/sti_layer.h
>
> diff --git a/drivers/gpu/drm/sti/Makefile b/drivers/gpu/drm/sti/Makefile
> index dcc9568..1745697 100644
> --- a/drivers/gpu/drm/sti/Makefile
> +++ b/drivers/gpu/drm/sti/Makefile
> @@ -5,4 +5,5 @@ obj-$(CONFIG_DRM_STI) += \
> sti_hdmi_tx3g0c55phy.o \
> sti_hdmi_tx3g4c28phy.o \
> sti_hda.o \
> - sti_tvout.o
> \ No newline at end of file
> + sti_tvout.o \
> + sti_gdp.o
> \ No newline at end of file
> diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
> new file mode 100644
> index 0000000..a014214
> --- /dev/null
> +++ b/drivers/gpu/drm/sti/sti_gdp.c
> @@ -0,0 +1,482 @@
> +/*
> + * Copyright (C) STMicroelectronics SA 2014
> + * Authors: Benjamin Gaignard <benjamin.gaignard at st.com>
> + * Fabien Dessenne <fabien.dessenne at st.com>
> + * for STMicroelectronics.
> + * License terms: GNU General Public License (GPL), version 2
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/dma-mapping.h>
> +
> +#include "sti_gdp.h"
> +#include "sti_layer.h"
> +#include "sti_vtg.h"
> +
> +#define ENA_COLOR_FILL BIT(8)
> +#define WAIT_NEXT_VSYNC BIT(31)
> +
> +/* GDP color formats */
> +#define GDP_RGB565 0x00
> +#define GDP_RGB888 0x01
> +#define GDP_RGB888_32 0x02
> +#define GDP_ARGB8565 0x04
> +#define GDP_ARGB8888 0x05
> +#define GDP_ARGB1555 0x06
> +#define GDP_ARGB4444 0x07
> +#define GDP_CLUT8 0x0B
> +#define GDP_YCBR888 0x10
> +#define GDP_YCBR422R 0x12
> +#define GDP_AYCBR8888 0x15
> +
> +#define GAM_GDP_CTL_OFFSET 0x00
> +#define GAM_GDP_AGC_OFFSET 0x04
> +#define GAM_GDP_VPO_OFFSET 0x0C
> +#define GAM_GDP_VPS_OFFSET 0x10
> +#define GAM_GDP_PML_OFFSET 0x14
> +#define GAM_GDP_PMP_OFFSET 0x18
> +#define GAM_GDP_SIZE_OFFSET 0x1C
> +#define GAM_GDP_NVN_OFFSET 0x24
> +#define GAM_GDP_KEY1_OFFSET 0x28
> +#define GAM_GDP_KEY2_OFFSET 0x2C
> +#define GAM_GDP_PPT_OFFSET 0x34
> +#define GAM_GDP_CML_OFFSET 0x3C
> +#define GAM_GDP_MST_OFFSET 0x68
> +
> +#define GAM_GDP_ALPHARANGE_255 BIT(5)
> +#define GAM_GDP_AGC_FULL_RANGE 0x00808080
> +#define GAM_GDP_PPT_IGNORE (BIT(1) | BIT(0))
> +#define GAM_GDP_SIZE_MAX 0x7FF
> +
> +static const uint32_t gdp_supported_formats[] = {
> + DRM_FORMAT_XRGB8888,
> + DRM_FORMAT_ARGB8888,
> + DRM_FORMAT_ARGB4444,
> + DRM_FORMAT_ARGB1555,
> + DRM_FORMAT_RGB565,
> + DRM_FORMAT_RGB888,
> + DRM_FORMAT_AYUV,
> + DRM_FORMAT_YUV444,
> + DRM_FORMAT_VYUY,
> + DRM_FORMAT_C8,
> +};
> +
> +static const uint32_t *sti_gdp_get_formats(void)
> +{
> + return gdp_supported_formats;
> +}
> +
> +static unsigned int sti_gdp_get_nb_formats(void)
> +{
> + return ARRAY_SIZE(gdp_supported_formats);
> +}
> +
> +static int sti_gdp_fourcc2format(int fourcc)
> +{
> + switch (fourcc) {
> + case DRM_FORMAT_XRGB8888:
> + return GDP_RGB888_32;
> + case DRM_FORMAT_ARGB8888:
> + return GDP_ARGB8888;
> + case DRM_FORMAT_ARGB4444:
> + return GDP_ARGB4444;
> + case DRM_FORMAT_ARGB1555:
> + return GDP_ARGB1555;
> + case DRM_FORMAT_RGB565:
> + return GDP_RGB565;
> + case DRM_FORMAT_RGB888:
> + return GDP_RGB888;
> + case DRM_FORMAT_AYUV:
> + return GDP_AYCBR8888;
> + case DRM_FORMAT_YUV444:
> + return GDP_YCBR888;
> + case DRM_FORMAT_VYUY:
> + return GDP_YCBR422R;
> + case DRM_FORMAT_C8:
> + return GDP_CLUT8;
> + }
> + return -1;
> +}
> +
> +static int sti_gdp_get_alpharange(int format)
> +{
> + switch (format) {
> + case GDP_ARGB8565:
> + case GDP_ARGB8888:
> + case GDP_AYCBR8888:
> + return GAM_GDP_ALPHARANGE_255;
> + }
> + return 0;
> +}
> +
> +/**
> + * sti_gdp_get_free_nodes
> + * @layer: gdp layer
> + *
> + * Look for a GDP node list that is not currently read by the HW.
> + *
> + * RETURNS:
> + * Pointer to the free GDP node list
> + */
> +static struct sti_gdp_node_list *sti_gdp_get_free_nodes(struct sti_layer *layer)
> +{
> + int hw_nvn;
> + void *virt_nvn;
> + struct sti_gdp *gdp = layer->gdp;
> + unsigned int i;
> +
> + hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
> + if (!hw_nvn)
> + goto end;
> +
> + virt_nvn = dma_to_virt(gdp->dev, (dma_addr_t) hw_nvn);
> +
> + for (i = 0; i < GDP_NODE_NB_BANK; i++)
> + if ((virt_nvn != gdp->node_list[i].btm_field) &&
> + (virt_nvn != gdp->node_list[i].top_field))
> + return &gdp->node_list[i];
> +
hmm, from looks of it, you don't expect to fall past the end of the
node list.. is that an error case, in which case a WARN_ON() might be
appropriate? The 'goto end' part I'm less sure about (for different
generation of hw?) so not sure if the WARN should be after or before
the 'end' label.
> +end:
> + return &gdp->node_list[0];
> +}
> +
> +/**
> + * sti_gdp_get_current_nodes
> + * @layer: GDP layer
> + *
> + * Look for GDP nodes that are currently read by the HW.
> + *
> + * RETURNS:
> + * Pointer to the current GDP node list
> + */
> +static
> +struct sti_gdp_node_list *sti_gdp_get_current_nodes(struct sti_layer *layer)
> +{
> + int hw_nvn;
> + void *virt_nvn;
> + struct sti_gdp *gdp = layer->gdp;
> + unsigned int i;
> +
> + hw_nvn = readl(gdp->regs + GAM_GDP_NVN_OFFSET);
> + if (!hw_nvn)
> + goto end;
> +
> + virt_nvn = dma_to_virt(gdp->dev, (dma_addr_t) hw_nvn);
> +
> + for (i = 0; i < GDP_NODE_NB_BANK; i++)
> + if ((virt_nvn == gdp->node_list[i].btm_field) ||
> + (virt_nvn == gdp->node_list[i].top_field))
> + return &gdp->node_list[i];
> +
> +end:
> + return NULL;
> +}
> +
> +/**
> + * sti_gdp_prepare_layer
> + * @lay: gdp layer
> + * @first_prepare: true if it is the first time this function is called
> + *
> + * Update the free GDP node list according to the layer properties.
> + *
> + * RETURNS:
> + * 0 on success.
> + */
> +static int sti_gdp_prepare_layer(void *lay, bool first_prepare)
> +{
> + struct sti_layer *layer = (struct sti_layer *)lay;
> + struct sti_gdp_node_list *list;
> + struct sti_gdp_node *top_field, *btm_field;
> + struct drm_display_mode *mode = layer->mode;
> + struct device *dev = layer->gdp->dev;
> + int format;
> + unsigned int depth, bpp;
> + int rate = mode->clock * 1000;
> + int res;
> + u32 ydo, xdo, yds, xds;
> +
> + list = sti_gdp_get_free_nodes(layer);
> + top_field = list->top_field;
> + btm_field = list->btm_field;
> +
> + /* Build the top field from layer params */
> + top_field->gam_gdp_agc = GAM_GDP_AGC_FULL_RANGE;
> + top_field->gam_gdp_ctl = WAIT_NEXT_VSYNC;
> + format = sti_gdp_fourcc2format(layer->format);
> + if (format == -1) {
> + DRM_ERROR("Format not supported by GDP %.4s\n",
> + (char *)&layer->format);
> + return 1;
> + }
> + top_field->gam_gdp_ctl |= format;
> + top_field->gam_gdp_ctl |= sti_gdp_get_alpharange(format);
> + top_field->gam_gdp_ppt &= ~GAM_GDP_PPT_IGNORE;
> +
> + /* pixel memory location */
> + drm_fb_get_bpp_depth(layer->format, &depth, &bpp);
> + top_field->gam_gdp_pml = (u32) layer->paddr + layer->offsets[0];
> + top_field->gam_gdp_pml += layer->src_x * (bpp >> 3);
> + top_field->gam_gdp_pml += layer->src_y * layer->pitches[0];
> +
> + /* input parameters */
> + top_field->gam_gdp_pmp = layer->pitches[0];
> + top_field->gam_gdp_size =
> + clamp_val(layer->src_h, 0, GAM_GDP_SIZE_MAX) << 16 |
> + clamp_val(layer->src_w, 0, GAM_GDP_SIZE_MAX);
> +
> + /* output parameters */
> + ydo = sti_vtg_get_line_number(*mode, layer->dst_y);
> + yds = sti_vtg_get_line_number(*mode, layer->dst_y + layer->dst_h - 1);
> + xdo = sti_vtg_get_pixel_number(*mode, layer->dst_x);
> + xds = sti_vtg_get_pixel_number(*mode, layer->dst_x + layer->dst_w - 1);
> + top_field->gam_gdp_vpo = (ydo << 16) | xdo;
> + top_field->gam_gdp_vps = (yds << 16) | xds;
> +
> + /* Same content and chained together */
> + memcpy(btm_field, top_field, sizeof(*btm_field));
> + top_field->gam_gdp_nvn = virt_to_dma(dev, btm_field);
> + btm_field->gam_gdp_nvn = virt_to_dma(dev, top_field);
> +
> + /* Interlaced mode */
> + if (layer->mode->flags & DRM_MODE_FLAG_INTERLACE)
> + btm_field->gam_gdp_pml = top_field->gam_gdp_pml +
> + layer->pitches[0];
> +
> + if (first_prepare) {
> + /* Set and enable gdp clock */
> + if (layer->gdp->clk_pix) {
> + res = clk_set_rate(layer->gdp->clk_pix, rate);
> + if (res < 0) {
> + DRM_ERROR("Cannot set rate (%dHz) for gdp\n",
> + rate);
> + return 1;
> + }
> +
> + if (clk_prepare_enable(layer->gdp->clk_pix)) {
> + DRM_ERROR("Failed to prepare/enable gdp\n");
> + return 1;
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * sti_gdp_commit_layer
> + * @lay: gdp layer
> + *
> + * Update the NVN field of the 'right' field of the current GDP node (being
> + * used by the HW) with the address of the updated ('free') top field GDP node.
> + * - In interlaced mode the 'right' field is the bottom field as we update
> + * frames starting from their top field
> + * - In progressive mode, we update both bottom and top fields which are
> + * equal nodes.
> + * At the next VSYNC, the updated node list will be used by the HW.
> + *
> + * RETURNS:
> + * 0 on success.
> + */
> +static int sti_gdp_commit_layer(void *lay)
> +{
> + struct sti_layer *layer = (struct sti_layer *)lay;
> + struct sti_gdp_node_list *updated_list = sti_gdp_get_free_nodes(layer);
> + struct sti_gdp_node *updated_top_node = updated_list->top_field;
> + struct sti_gdp_node *updated_btm_node = updated_list->btm_field;
> + struct sti_gdp *gdp = layer->gdp;
> + u32 dma_updated_top = virt_to_dma(gdp->dev, updated_top_node);
> + u32 dma_updated_btm = virt_to_dma(gdp->dev, updated_btm_node);
> + struct sti_gdp_node_list *curr_list = sti_gdp_get_current_nodes(layer);
> +
> + dev_dbg(gdp->dev, "Current NVN:0x%X\n",
> + readl(gdp->regs + GAM_GDP_NVN_OFFSET));
> + dev_dbg(gdp->dev, "Posted buff: %lx current buff: %x\n",
> + (unsigned long)layer->paddr,
> + readl(gdp->regs + GAM_GDP_PML_OFFSET));
> +
> + if (curr_list == NULL) {
> + /* First update or invalid node should directly write in the
> + * hw register */
> + writel(gdp->is_curr_top == true ?
> + dma_updated_btm : dma_updated_top,
> + gdp->regs + GAM_GDP_NVN_OFFSET);
> + return 0;
> + }
> +
> + if (layer->mode->flags & DRM_MODE_FLAG_INTERLACE) {
> + if (gdp->is_curr_top == true) {
> + /* Do not update in the middle of the frame, but
> + * postpone the update after the bottom field has
> + * been displayed */
> + curr_list->btm_field->gam_gdp_nvn = dma_updated_top;
> + } else {
> + /* Direct update to avoid one frame delay */
> + writel(dma_updated_top, gdp->regs + GAM_GDP_NVN_OFFSET);
> + }
> + } else {
> + /* Direct update for progressive to avoid one frame delay */
> + writel(dma_updated_top, gdp->regs + GAM_GDP_NVN_OFFSET);
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * sti_gdp_disable_layer
> + * @lay: gdp layer
> + *
> + * Disable a GDP.
> + *
> + * RETURNS:
> + * 0 on success.
> + */
> +static int sti_gdp_disable_layer(void *lay)
> +{
> + unsigned int i;
> + struct sti_layer *layer = (struct sti_layer *)lay;
> + struct sti_gdp *gdp = layer->gdp;
> +
> + /* Set the nodes as 'to be ignored on mixer' */
> + for (i = 0; i < GDP_NODE_NB_BANK; i++) {
> + gdp->node_list[i].top_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
> + gdp->node_list[i].btm_field->gam_gdp_ppt |= GAM_GDP_PPT_IGNORE;
> + }
> +
> + if (gdp->clk_pix)
> + clk_disable_unprepare(gdp->clk_pix);
> +
> + return 0;
> +}
> +
> +/**
> + * sti_gdp_field_cb
> + * @nb: notifier block
> + * @event: event message
> + * @data: private data
> + *
> + * Handle VTG top field and bottom field event.
> + *
> + * RETURNS:
> + * 0 on success.
> + */
> +int sti_gdp_field_cb(struct notifier_block *nb,
> + unsigned long event, void *data)
> +{
> + struct sti_gdp *gdp = container_of(nb, struct sti_gdp, vtg_field_nb);
> +
> + switch (event) {
> + case VTG_TOP_FIELD_EVENT:
> + gdp->is_curr_top = true;
> + break;
> + case VTG_BOTTOM_FIELD_EVENT:
> + gdp->is_curr_top = false;
> + break;
> + default:
> + DRM_ERROR("unsupported event: %lu\n", event);
> + break;
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * sti_gdp_create
> + * @dev: device
> + * @id: gdp id
> + * @baseaddr: IO addr
> + *
> + * Create a gdp object. Allocate memory and initialize parameters.
> + *
> + *
> + * RETURNS:
> + * Pointer to the created gdp object.
> + */
> +struct sti_gdp *sti_gdp_create(struct device *dev, int id,
> + void __iomem *baseaddr)
> +{
> + struct sti_gdp *gdp;
> + struct device_node *np = dev->of_node;
> + dma_addr_t dma;
> + void *base;
> + unsigned int i, size;
> +
> + gdp = devm_kzalloc(dev, sizeof(*gdp), GFP_KERNEL);
> + if (!gdp) {
> + DRM_ERROR("Failed to allocate memory for GDP\n");
> + return NULL;
> + }
> +
> + /* Allocate all the nodes within a single memory page */
> + size = sizeof(struct sti_gdp_node) *
> + GDP_NODE_PER_FIELD * GDP_NODE_NB_BANK;
> +
> + base = dma_alloc_writecombine(dev, size, &dma, GFP_KERNEL | GFP_DMA);
> + if (!base) {
> + DRM_ERROR("Failed to allocate memory for GDP node\n");
> + goto mem_err;
> + }
> + memset(base, 0, size);
> +
> + for (i = 0; i < GDP_NODE_NB_BANK; i++) {
> + if (virt_to_dma(dev, base) & 0xF) {
> + DRM_ERROR("Mem alignment failed\n");
> + goto mem_err;
> + }
> + gdp->node_list[i].top_field = base;
> + DRM_DEBUG_DRIVER("node[%d].top_field=%p\n", i, base);
> + base += sizeof(struct sti_gdp_node);
> +
> + if (virt_to_dma(dev, base) & 0xF) {
> + DRM_ERROR("Mem alignment failed\n");
> + goto mem_err;
> + }
> + gdp->node_list[i].btm_field = base;
> + DRM_DEBUG_DRIVER("node[%d].btm_field=%p\n", i, base);
> + base += sizeof(struct sti_gdp_node);
> + }
> +
> + gdp->dev = dev;
> + gdp->regs = baseaddr;
> + gdp->get_formats = sti_gdp_get_formats;
> + gdp->get_nb_formats = sti_gdp_get_nb_formats;
> + gdp->prepare = sti_gdp_prepare_layer;
> + gdp->commit = sti_gdp_commit_layer;
> + gdp->disable = sti_gdp_disable_layer;
generally people like to split out the fxn ptrs to be in their own
_funcs struct, so it can be const.
BR,
-R
> + gdp->vtg_field_nb.notifier_call = sti_gdp_field_cb;
> +
> + if (of_device_is_compatible(np, "st,stih407-compositor")) {
> + /* GDP of STiH407 chip have its own pixel clock */
> + char *clk_name;
> +
> + switch (id) {
> + case STI_GDP_0:
> + clk_name = "pix_gdp1";
> + break;
> + case STI_GDP_1:
> + clk_name = "pix_gdp2";
> + break;
> + case STI_GDP_2:
> + clk_name = "pix_gdp3";
> + break;
> + case STI_GDP_3:
> + clk_name = "pix_gdp4";
> + break;
> + default:
> + DRM_ERROR("GDP id not recognized\n");
> + goto err_clk_pix_gdp;
> + }
> +
> + gdp->clk_pix = devm_clk_get(dev, clk_name);
> + if (IS_ERR(gdp->clk_pix)) {
> + DRM_ERROR("Cannot get %s clock\n", clk_name);
> + goto err_clk_pix_gdp;
> + }
> + }
> +
> + return gdp;
> +
> +err_clk_pix_gdp:
> +mem_err:
> + devm_kfree(dev, gdp);
> + return NULL;
> +}
> diff --git a/drivers/gpu/drm/sti/sti_gdp.h b/drivers/gpu/drm/sti/sti_gdp.h
> new file mode 100644
> index 0000000..3618039
> --- /dev/null
> +++ b/drivers/gpu/drm/sti/sti_gdp.h
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright (C) STMicroelectronics SA 2014
> + * Authors: Benjamin Gaignard <benjamin.gaignard at st.com>
> + * Fabien Dessenne <fabien.dessenne at st.com>
> + * for STMicroelectronics.
> + * License terms: GNU General Public License (GPL), version 2
> + */
> +
> +#ifndef _STI_GDP_H_
> +#define _STI_GDP_H_
> +
> +#include <linux/types.h>
> +
> +#define GDP_NODE_NB_BANK 2
> +#define GDP_NODE_PER_FIELD 2
> +
> +struct sti_gdp_node {
> + u32 gam_gdp_ctl;
> + u32 gam_gdp_agc;
> + u32 reserved1;
> + u32 gam_gdp_vpo;
> + u32 gam_gdp_vps;
> + u32 gam_gdp_pml;
> + u32 gam_gdp_pmp;
> + u32 gam_gdp_size;
> + u32 reserved2;
> + u32 gam_gdp_nvn;
> + u32 gam_gdp_key1;
> + u32 gam_gdp_key2;
> + u32 reserved3;
> + u32 gam_gdp_ppt;
> + u32 reserved4;
> + u32 gam_gdp_cml;
> +};
> +
> +struct sti_gdp_node_list {
> + struct sti_gdp_node *top_field;
> + struct sti_gdp_node *btm_field;
> +};
> +
> +/*
> + * STI GDP structure
> + *
> + * @device: driver device
> + * @regs: subdevice register
> + * @clk_pix: pixel clock for the current gdp
> + * @vtg_field_nb: callback for VTG FIELD (top or bottom) notification
> + * @is_curr_top: true if the current node processed is the top field
> + * @get_formats: get GDP supported formats
> + * @get_nb_formats: get number of format supported
> + * @prepare: prepare GDP before rendering
> + * @commit: set GDP for rendering
> + * @disable: disable GDP
> + * @node_list: array of node list
> + */
> +struct sti_gdp {
> + struct device *dev;
> + void __iomem *regs;
> + struct clk *clk_pix;
> + struct notifier_block vtg_field_nb;
> + bool is_curr_top;
> + const uint32_t* (*get_formats)(void);
> + unsigned int (*get_nb_formats)(void);
> + int (*prepare)(void *layer, bool first_prepare);
> + int (*commit)(void *layer);
> + int (*disable)(void *layer);
> + struct sti_gdp_node_list node_list[GDP_NODE_NB_BANK];
> +};
> +
> +struct sti_gdp *sti_gdp_create(struct device *dev, int id,
> + void __iomem *baseaddr);
> +
> +#endif
> diff --git a/drivers/gpu/drm/sti/sti_layer.h b/drivers/gpu/drm/sti/sti_layer.h
> new file mode 100644
> index 0000000..7ba5a40
> --- /dev/null
> +++ b/drivers/gpu/drm/sti/sti_layer.h
> @@ -0,0 +1,111 @@
> +/*
> + * Copyright (C) STMicroelectronics SA 2014
> + * Authors: Benjamin Gaignard <benjamin.gaignard at st.com>
> + * Fabien Dessenne <fabien.dessenne at st.com>
> + * for STMicroelectronics.
> + * License terms: GNU General Public License (GPL), version 2
> + */
> +
> +#ifndef _STI_LAYER_H_
> +#define _STI_LAYER_H_
> +
> +#include <drm/drmP.h>
> +#include "sti_gdp.h"
> +
> +#define to_sti_layer(x) container_of(x, struct sti_layer, plane)
> +
> +#define STI_LAYER_TYPE_SHIFT 8
> +#define STI_LAYER_TYPE_MASK (~((1<<STI_LAYER_TYPE_SHIFT)-1))
> +
> +
> +enum sti_layer_type {
> + STI_GDP = 1 << STI_LAYER_TYPE_SHIFT,
> + STI_VID = 2 << STI_LAYER_TYPE_SHIFT,
> + STI_CUR = 3 << STI_LAYER_TYPE_SHIFT,
> + STI_BCK = 4 << STI_LAYER_TYPE_SHIFT
> +};
> +
> +enum sti_layer_id_of_type {
> + STI_ID_0 = 0,
> + STI_ID_1 = 1,
> + STI_ID_2 = 2,
> + STI_ID_3 = 3
> +};
> +
> +enum sti_layer_desc {
> + STI_GDP_0 = STI_GDP | STI_ID_0,
> + STI_GDP_1 = STI_GDP | STI_ID_1,
> + STI_GDP_2 = STI_GDP | STI_ID_2,
> + STI_GDP_3 = STI_GDP | STI_ID_3,
> + STI_VID_0 = STI_VID | STI_ID_0,
> + STI_VID_1 = STI_VID | STI_ID_1,
> + STI_CURSOR = STI_CUR,
> + STI_BACK = STI_BCK
> +};
> +
> +struct sti_fps_info {
> + bool output;
> + unsigned int curr_frame_counter;
> + unsigned int last_frame_counter;
> + struct timespec last_timestamp;
> +};
> +
> +/*
> + * STI layer structure
> + *
> + * @plane: drm plane it is bound to (if any)
> + * @fb: drm fb it is bound to
> + * @mode: display mode
> + * @desc: layer type & id
> + * @zorder: layer z-order
> + * @mixer_id: id of the mixer used to display the layer
> + * @enabled: to know if the layer is active or not
> + * @src_x src_y: coordinates of the input (fb) area
> + * @src_w src_h: size of the input (fb) area
> + * @dst_x dst_y: coordinates of the output (crtc) area
> + * @dst_w dst_h: size of the output (crtc) area
> + * @format: format
> + * @pitches: pitch of 'planes' (eg: Y, U, V)
> + * @offsets: offset of 'planes'
> + * @paddr: physical address of the input buffer
> + * @fps_info: frame per second info
> + * @gdp: related GDP (if the layer is a GDP)
> + */
> +struct sti_layer {
> + struct drm_plane plane;
> + struct drm_framebuffer *fb;
> + struct drm_display_mode *mode;
> + enum sti_layer_desc desc;
> + int zorder;
> + int mixer_id;
> + bool enabled;
> + int src_x, src_y;
> + int src_w, src_h;
> + int dst_x, dst_y;
> + int dst_w, dst_h;
> + uint32_t format;
> + unsigned int pitches[4];
> + unsigned int offsets[4];
> + dma_addr_t paddr;
> + struct sti_fps_info fps_info;
> + struct sti_gdp *gdp;
> +};
> +
> +struct sti_layer *sti_layer_create(struct device *dev, int desc,
> + void __iomem *baseaddr);
> +int sti_layer_prepare(struct sti_layer *layer, struct drm_framebuffer *fb,
> + struct drm_display_mode *mode,
> + int mixer_id,
> + int dest_x, int dest_y,
> + int dest_w, int dest_h,
> + int src_x, int src_y,
> + int src_w, int src_h);
> +int sti_layer_commit(struct sti_layer *layer);
> +int sti_layer_disable(struct sti_layer *layer);
> +const uint32_t *sti_layer_get_formats(struct sti_layer *layer);
> +unsigned int sti_layer_get_nb_formats(struct sti_layer *layer);
> +struct sti_layer *sti_layer_find_layer(struct sti_layer *layer[],
> + enum sti_layer_desc desc);
> +const char *sti_layer_to_str(struct sti_layer *layer);
> +
> +#endif
> --
> 1.9.1
>
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