426 lines
10 KiB
C
426 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rob Clark <rob@ti.com>
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*/
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#include <linux/dma-mapping.h>
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#include <drm/drm_modeset_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include "omap_dmm_tiler.h"
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#include "omap_drv.h"
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/*
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* framebuffer funcs
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*/
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static const u32 formats[] = {
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/* 16bpp [A]RGB: */
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DRM_FORMAT_RGB565, /* RGB16-565 */
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DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
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DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
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DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
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DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
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DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
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DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
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/* 24bpp RGB: */
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DRM_FORMAT_RGB888, /* RGB24-888 */
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/* 32bpp [A]RGB: */
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DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
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DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
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DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
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DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
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/* YUV: */
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DRM_FORMAT_NV12,
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DRM_FORMAT_YUYV,
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DRM_FORMAT_UYVY,
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};
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/* per-plane info for the fb: */
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struct plane {
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dma_addr_t dma_addr;
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};
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#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
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struct omap_framebuffer {
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struct drm_framebuffer base;
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int pin_count;
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const struct drm_format_info *format;
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struct plane planes[2];
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/* lock for pinning (pin_count and planes.dma_addr) */
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struct mutex lock;
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};
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static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned flags, unsigned color,
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struct drm_clip_rect *clips,
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unsigned num_clips)
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{
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struct drm_crtc *crtc;
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drm_modeset_lock_all(fb->dev);
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drm_for_each_crtc(crtc, fb->dev)
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omap_crtc_flush(crtc);
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drm_modeset_unlock_all(fb->dev);
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return 0;
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}
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static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
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.create_handle = drm_gem_fb_create_handle,
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.dirty = omap_framebuffer_dirty,
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.destroy = drm_gem_fb_destroy,
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};
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static u32 get_linear_addr(struct drm_framebuffer *fb,
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const struct drm_format_info *format, int n, int x, int y)
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{
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struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
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struct plane *plane = &omap_fb->planes[n];
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u32 offset;
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offset = fb->offsets[n]
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+ (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
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+ (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
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return plane->dma_addr + offset;
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}
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bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
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{
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return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK;
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}
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/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
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static u32 drm_rotation_to_tiler(unsigned int drm_rot)
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{
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u32 orient;
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switch (drm_rot & DRM_MODE_ROTATE_MASK) {
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default:
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case DRM_MODE_ROTATE_0:
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orient = 0;
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break;
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case DRM_MODE_ROTATE_90:
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orient = MASK_XY_FLIP | MASK_X_INVERT;
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break;
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case DRM_MODE_ROTATE_180:
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orient = MASK_X_INVERT | MASK_Y_INVERT;
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break;
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case DRM_MODE_ROTATE_270:
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orient = MASK_XY_FLIP | MASK_Y_INVERT;
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break;
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}
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if (drm_rot & DRM_MODE_REFLECT_X)
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orient ^= MASK_X_INVERT;
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if (drm_rot & DRM_MODE_REFLECT_Y)
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orient ^= MASK_Y_INVERT;
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return orient;
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}
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/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
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*/
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void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
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struct drm_plane_state *state, struct omap_overlay_info *info)
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{
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struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
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const struct drm_format_info *format = omap_fb->format;
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u32 x, y, orient = 0;
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info->fourcc = fb->format->format;
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info->pos_x = state->crtc_x;
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info->pos_y = state->crtc_y;
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info->out_width = state->crtc_w;
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info->out_height = state->crtc_h;
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info->width = state->src_w >> 16;
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info->height = state->src_h >> 16;
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/* DSS driver wants the w & h in rotated orientation */
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if (drm_rotation_90_or_270(state->rotation))
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swap(info->width, info->height);
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x = state->src_x >> 16;
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y = state->src_y >> 16;
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if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) {
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u32 w = state->src_w >> 16;
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u32 h = state->src_h >> 16;
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orient = drm_rotation_to_tiler(state->rotation);
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/*
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* omap_gem_rotated_paddr() wants the x & y in tiler units.
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* Usually tiler unit size is the same as the pixel size, except
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* for YUV422 formats, for which the tiler unit size is 32 bits
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* and pixel size is 16 bits.
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*/
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if (fb->format->format == DRM_FORMAT_UYVY ||
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fb->format->format == DRM_FORMAT_YUYV) {
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x /= 2;
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w /= 2;
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}
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/* adjust x,y offset for invert: */
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if (orient & MASK_Y_INVERT)
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y += h - 1;
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if (orient & MASK_X_INVERT)
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x += w - 1;
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/* Note: x and y are in TILER units, not pixels */
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omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
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&info->paddr);
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info->rotation_type = OMAP_DSS_ROT_TILER;
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info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
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/* Note: stride in TILER units, not pixels */
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info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
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} else {
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switch (state->rotation & DRM_MODE_ROTATE_MASK) {
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case 0:
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case DRM_MODE_ROTATE_0:
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/* OK */
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break;
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default:
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dev_warn(fb->dev->dev,
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"rotation '%d' ignored for non-tiled fb\n",
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state->rotation);
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break;
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}
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info->paddr = get_linear_addr(fb, format, 0, x, y);
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info->rotation_type = OMAP_DSS_ROT_NONE;
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info->rotation = DRM_MODE_ROTATE_0;
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info->screen_width = fb->pitches[0];
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}
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/* convert to pixels: */
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info->screen_width /= format->cpp[0];
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if (fb->format->format == DRM_FORMAT_NV12) {
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if (info->rotation_type == OMAP_DSS_ROT_TILER) {
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WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK));
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omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
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&info->p_uv_addr);
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} else {
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info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
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}
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} else {
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info->p_uv_addr = 0;
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}
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}
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/* pin, prepare for scanout: */
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int omap_framebuffer_pin(struct drm_framebuffer *fb)
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{
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struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
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int ret, i, n = fb->format->num_planes;
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mutex_lock(&omap_fb->lock);
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if (omap_fb->pin_count > 0) {
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omap_fb->pin_count++;
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mutex_unlock(&omap_fb->lock);
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return 0;
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}
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for (i = 0; i < n; i++) {
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struct plane *plane = &omap_fb->planes[i];
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ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
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if (ret)
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goto fail;
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omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
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}
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omap_fb->pin_count++;
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mutex_unlock(&omap_fb->lock);
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return 0;
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fail:
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for (i--; i >= 0; i--) {
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struct plane *plane = &omap_fb->planes[i];
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omap_gem_unpin(fb->obj[i]);
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plane->dma_addr = 0;
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}
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mutex_unlock(&omap_fb->lock);
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return ret;
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}
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/* unpin, no longer being scanned out: */
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void omap_framebuffer_unpin(struct drm_framebuffer *fb)
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{
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struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
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int i, n = fb->format->num_planes;
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mutex_lock(&omap_fb->lock);
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omap_fb->pin_count--;
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if (omap_fb->pin_count > 0) {
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mutex_unlock(&omap_fb->lock);
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return;
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}
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for (i = 0; i < n; i++) {
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struct plane *plane = &omap_fb->planes[i];
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omap_gem_unpin(fb->obj[i]);
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plane->dma_addr = 0;
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}
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mutex_unlock(&omap_fb->lock);
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}
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#ifdef CONFIG_DEBUG_FS
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void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
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{
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int i, n = fb->format->num_planes;
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seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
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(char *)&fb->format->format);
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for (i = 0; i < n; i++) {
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seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
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i, fb->offsets[n], fb->pitches[i]);
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omap_gem_describe(fb->obj[i], m);
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}
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}
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#endif
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struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
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struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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const struct drm_format_info *info = drm_get_format_info(dev,
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mode_cmd);
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unsigned int num_planes = info->num_planes;
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struct drm_gem_object *bos[4];
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struct drm_framebuffer *fb;
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int i;
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for (i = 0; i < num_planes; i++) {
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bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
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if (!bos[i]) {
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fb = ERR_PTR(-ENOENT);
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goto error;
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}
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}
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fb = omap_framebuffer_init(dev, mode_cmd, bos);
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if (IS_ERR(fb))
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goto error;
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return fb;
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error:
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while (--i >= 0)
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drm_gem_object_put_unlocked(bos[i]);
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return fb;
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}
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struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
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{
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const struct drm_format_info *format = NULL;
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struct omap_framebuffer *omap_fb = NULL;
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struct drm_framebuffer *fb = NULL;
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unsigned int pitch = mode_cmd->pitches[0];
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int ret, i;
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DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
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dev, mode_cmd, mode_cmd->width, mode_cmd->height,
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(char *)&mode_cmd->pixel_format);
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format = drm_get_format_info(dev, mode_cmd);
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for (i = 0; i < ARRAY_SIZE(formats); i++) {
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if (formats[i] == mode_cmd->pixel_format)
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break;
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}
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if (!format || i == ARRAY_SIZE(formats)) {
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dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
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(char *)&mode_cmd->pixel_format);
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ret = -EINVAL;
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goto fail;
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}
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omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
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if (!omap_fb) {
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ret = -ENOMEM;
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goto fail;
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}
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fb = &omap_fb->base;
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omap_fb->format = format;
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mutex_init(&omap_fb->lock);
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/*
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* The code below assumes that no format use more than two planes, and
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* that the two planes of multiplane formats need the same number of
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* bytes per pixel.
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*/
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if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
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dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
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ret = -EINVAL;
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goto fail;
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}
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if (pitch % format->cpp[0]) {
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dev_dbg(dev->dev,
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"buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
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pitch, format->cpp[0]);
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ret = -EINVAL;
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goto fail;
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}
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for (i = 0; i < format->num_planes; i++) {
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struct plane *plane = &omap_fb->planes[i];
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unsigned int vsub = i == 0 ? 1 : format->vsub;
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unsigned int size;
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size = pitch * mode_cmd->height / vsub;
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if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
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dev_dbg(dev->dev,
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"provided buffer object is too small! %zu < %d\n",
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bos[i]->size - mode_cmd->offsets[i], size);
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ret = -EINVAL;
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goto fail;
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}
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fb->obj[i] = bos[i];
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plane->dma_addr = 0;
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}
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drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
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ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
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if (ret) {
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dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
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goto fail;
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}
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DBG("create: FB ID: %d (%p)", fb->base.id, fb);
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return fb;
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fail:
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kfree(omap_fb);
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return ERR_PTR(ret);
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}
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