forked from Minki/linux
51c1327876
The SH Mobile LCD controller (LCDC) DRM driver supports the main graphics plane in RGB and YUV formats, as well as the overlay planes (in alpha-blending mode only). Only flat panel outputs using the parallel interface are supported. Support for SYS panels, HDMI and DSI is currently not implemented. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
269 lines
7.1 KiB
C
269 lines
7.1 KiB
C
/*
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* shmob_drm_plane.c -- SH Mobile DRM Planes
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*
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* Copyright (C) 2012 Renesas Corporation
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*
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <video/sh_mobile_meram.h>
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#include "shmob_drm_drv.h"
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#include "shmob_drm_kms.h"
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#include "shmob_drm_plane.h"
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#include "shmob_drm_regs.h"
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struct shmob_drm_plane {
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struct drm_plane plane;
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unsigned int index;
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unsigned int alpha;
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const struct shmob_drm_format_info *format;
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unsigned long dma[2];
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unsigned int src_x;
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unsigned int src_y;
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unsigned int crtc_x;
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unsigned int crtc_y;
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unsigned int crtc_w;
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unsigned int crtc_h;
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};
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#define to_shmob_plane(p) container_of(p, struct shmob_drm_plane, plane)
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static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
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struct drm_framebuffer *fb,
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int x, int y)
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{
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struct drm_gem_cma_object *gem;
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unsigned int bpp;
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bpp = splane->format->yuv ? 8 : splane->format->bpp;
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gem = drm_fb_cma_get_gem_obj(fb, 0);
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splane->dma[0] = gem->paddr + fb->offsets[0]
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+ y * fb->pitches[0] + x * bpp / 8;
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if (splane->format->yuv) {
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bpp = splane->format->bpp - 8;
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gem = drm_fb_cma_get_gem_obj(fb, 1);
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splane->dma[1] = gem->paddr + fb->offsets[1]
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+ y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
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+ x * (bpp == 16 ? 2 : 1);
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}
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}
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static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
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struct drm_framebuffer *fb)
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{
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struct shmob_drm_device *sdev = splane->plane.dev->dev_private;
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u32 format;
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/* TODO: Support ROP3 mode */
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format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT);
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switch (splane->format->fourcc) {
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case DRM_FORMAT_RGB565:
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case DRM_FORMAT_NV21:
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case DRM_FORMAT_NV61:
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case DRM_FORMAT_NV42:
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format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
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break;
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case DRM_FORMAT_RGB888:
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case DRM_FORMAT_NV12:
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case DRM_FORMAT_NV16:
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case DRM_FORMAT_NV24:
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format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
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break;
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case DRM_FORMAT_ARGB8888:
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default:
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format |= LDBBSIFR_SWPL;
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break;
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}
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switch (splane->format->fourcc) {
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case DRM_FORMAT_RGB565:
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format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
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break;
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case DRM_FORMAT_RGB888:
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format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
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break;
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case DRM_FORMAT_ARGB8888:
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format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
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break;
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case DRM_FORMAT_NV12:
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case DRM_FORMAT_NV21:
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format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
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break;
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case DRM_FORMAT_NV16:
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case DRM_FORMAT_NV61:
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format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
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break;
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case DRM_FORMAT_NV24:
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case DRM_FORMAT_NV42:
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format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
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break;
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}
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#define plane_reg_dump(sdev, splane, reg) \
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dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
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splane->index, #reg, \
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lcdc_read(sdev, reg(splane->index)), \
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lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
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plane_reg_dump(sdev, splane, LDBnBSIFR);
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plane_reg_dump(sdev, splane, LDBnBSSZR);
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plane_reg_dump(sdev, splane, LDBnBLOCR);
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plane_reg_dump(sdev, splane, LDBnBSMWR);
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plane_reg_dump(sdev, splane, LDBnBSAYR);
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plane_reg_dump(sdev, splane, LDBnBSACR);
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lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
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dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
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"LDBCR", lcdc_read(sdev, LDBCR));
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lcdc_write(sdev, LDBnBSIFR(splane->index), format);
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lcdc_write(sdev, LDBnBSSZR(splane->index),
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(splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
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(splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
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lcdc_write(sdev, LDBnBLOCR(splane->index),
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(splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
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(splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
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lcdc_write(sdev, LDBnBSMWR(splane->index),
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fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
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shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
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lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
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if (splane->format->yuv)
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lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
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lcdc_write(sdev, LDBCR,
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LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
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dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
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"LDBCR", lcdc_read(sdev, LDBCR));
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plane_reg_dump(sdev, splane, LDBnBSIFR);
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plane_reg_dump(sdev, splane, LDBnBSSZR);
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plane_reg_dump(sdev, splane, LDBnBLOCR);
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plane_reg_dump(sdev, splane, LDBnBSMWR);
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plane_reg_dump(sdev, splane, LDBnBSAYR);
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plane_reg_dump(sdev, splane, LDBnBSACR);
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}
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void shmob_drm_plane_setup(struct drm_plane *plane)
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{
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struct shmob_drm_plane *splane = to_shmob_plane(plane);
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if (plane->fb == NULL || !plane->enabled)
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return;
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__shmob_drm_plane_setup(splane, plane->fb);
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}
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static int
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shmob_drm_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
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struct drm_framebuffer *fb, int crtc_x, int crtc_y,
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unsigned int crtc_w, unsigned int crtc_h,
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uint32_t src_x, uint32_t src_y,
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uint32_t src_w, uint32_t src_h)
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{
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struct shmob_drm_plane *splane = to_shmob_plane(plane);
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struct shmob_drm_device *sdev = plane->dev->dev_private;
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const struct shmob_drm_format_info *format;
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format = shmob_drm_format_info(fb->pixel_format);
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if (format == NULL) {
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dev_dbg(sdev->dev, "update_plane: unsupported format %08x\n",
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fb->pixel_format);
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return -EINVAL;
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}
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if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
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dev_dbg(sdev->dev, "%s: scaling not supported\n", __func__);
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return -EINVAL;
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}
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splane->format = format;
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splane->src_x = src_x >> 16;
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splane->src_y = src_y >> 16;
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splane->crtc_x = crtc_x;
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splane->crtc_y = crtc_y;
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splane->crtc_w = crtc_w;
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splane->crtc_h = crtc_h;
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__shmob_drm_plane_setup(splane, fb);
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return 0;
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}
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static int shmob_drm_plane_disable(struct drm_plane *plane)
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{
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struct shmob_drm_plane *splane = to_shmob_plane(plane);
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struct shmob_drm_device *sdev = plane->dev->dev_private;
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splane->format = NULL;
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lcdc_write(sdev, LDBnBSIFR(splane->index), 0);
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return 0;
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}
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static void shmob_drm_plane_destroy(struct drm_plane *plane)
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{
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struct shmob_drm_plane *splane = to_shmob_plane(plane);
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shmob_drm_plane_disable(plane);
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drm_plane_cleanup(plane);
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kfree(splane);
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}
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static const struct drm_plane_funcs shmob_drm_plane_funcs = {
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.update_plane = shmob_drm_plane_update,
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.disable_plane = shmob_drm_plane_disable,
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.destroy = shmob_drm_plane_destroy,
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};
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static const uint32_t formats[] = {
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DRM_FORMAT_RGB565,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_NV12,
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DRM_FORMAT_NV21,
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DRM_FORMAT_NV16,
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DRM_FORMAT_NV61,
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DRM_FORMAT_NV24,
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DRM_FORMAT_NV42,
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};
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int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
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{
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struct shmob_drm_plane *splane;
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int ret;
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splane = kzalloc(sizeof(*splane), GFP_KERNEL);
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if (splane == NULL)
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return -ENOMEM;
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splane->index = index;
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splane->alpha = 255;
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ret = drm_plane_init(sdev->ddev, &splane->plane, 1,
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&shmob_drm_plane_funcs, formats,
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ARRAY_SIZE(formats), false);
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if (ret < 0)
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kfree(splane);
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return ret;
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}
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