From 8941a7cbcc5f06fb9e1d105911c928766d742861 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Mon, 7 Aug 2017 12:39:37 -0500 Subject: [PATCH] drm/tinydrm: Generalize tinydrm_xrgb8888_to_gray8() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This adds parameters for vaddr and clip to tinydrm_xrgb8888_to_gray8() to make it more generic. dma_buf_{begin,end}_cpu_access() are moved out to the repaper driver. Return type is change to void to simplify error handling by callers. Signed-off-by: David Lechner Signed-off-by: Noralf Trønnes Link: https://patchwork.freedesktop.org/patch/msgid/1502127581-10517-2-git-send-email-david@lechnology.com --- .../gpu/drm/tinydrm/core/tinydrm-helpers.c | 42 +++++++------------ drivers/gpu/drm/tinydrm/repaper.c | 28 +++++++++++-- include/drm/tinydrm/tinydrm-helpers.h | 3 +- 3 files changed, 41 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c index 75808bb84c9a..bd6cce093a85 100644 --- a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c +++ b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c @@ -185,7 +185,9 @@ EXPORT_SYMBOL(tinydrm_xrgb8888_to_rgb565); /** * tinydrm_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale * @dst: 8-bit grayscale destination buffer + * @vaddr: XRGB8888 source buffer * @fb: DRM framebuffer + * @clip: Clip rectangle area to copy * * Drm doesn't have native monochrome or grayscale support. * Such drivers can announce the commonly supported XR24 format to userspace @@ -195,41 +197,31 @@ EXPORT_SYMBOL(tinydrm_xrgb8888_to_rgb565); * where 1 means foreground color and 0 background color. * * ITU BT.601 is used for the RGB -> luma (brightness) conversion. - * - * Returns: - * Zero on success, negative error code on failure. */ -int tinydrm_xrgb8888_to_gray8(u8 *dst, struct drm_framebuffer *fb) +void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, + struct drm_clip_rect *clip) { - struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0); - struct dma_buf_attachment *import_attach = cma_obj->base.import_attach; - unsigned int x, y, pitch = fb->pitches[0]; - int ret = 0; + unsigned int len = (clip->x2 - clip->x1) * sizeof(u32); + unsigned int x, y; void *buf; u32 *src; if (WARN_ON(fb->format->format != DRM_FORMAT_XRGB8888)) - return -EINVAL; + return; /* * The cma memory is write-combined so reads are uncached. * Speed up by fetching one line at a time. */ - buf = kmalloc(pitch, GFP_KERNEL); + buf = kmalloc(len, GFP_KERNEL); if (!buf) - return -ENOMEM; + return; - if (import_attach) { - ret = dma_buf_begin_cpu_access(import_attach->dmabuf, - DMA_FROM_DEVICE); - if (ret) - goto err_free; - } - - for (y = 0; y < fb->height; y++) { - src = cma_obj->vaddr + (y * pitch); - memcpy(buf, src, pitch); + for (y = clip->y1; y < clip->y2; y++) { + src = vaddr + (y * fb->pitches[0]); + src += clip->x1; + memcpy(buf, src, len); src = buf; - for (x = 0; x < fb->width; x++) { + for (x = clip->x1; x < clip->x2; x++) { u8 r = (*src & 0x00ff0000) >> 16; u8 g = (*src & 0x0000ff00) >> 8; u8 b = *src & 0x000000ff; @@ -240,13 +232,7 @@ int tinydrm_xrgb8888_to_gray8(u8 *dst, struct drm_framebuffer *fb) } } - if (import_attach) - ret = dma_buf_end_cpu_access(import_attach->dmabuf, - DMA_FROM_DEVICE); -err_free: kfree(buf); - - return ret; } EXPORT_SYMBOL(tinydrm_xrgb8888_to_gray8); diff --git a/drivers/gpu/drm/tinydrm/repaper.c b/drivers/gpu/drm/tinydrm/repaper.c index 3343d3f15a90..30dc97b3ff21 100644 --- a/drivers/gpu/drm/tinydrm/repaper.c +++ b/drivers/gpu/drm/tinydrm/repaper.c @@ -18,6 +18,7 @@ */ #include +#include #include #include #include @@ -525,11 +526,20 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb, struct drm_clip_rect *clips, unsigned int num_clips) { + struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0); + struct dma_buf_attachment *import_attach = cma_obj->base.import_attach; struct tinydrm_device *tdev = fb->dev->dev_private; struct repaper_epd *epd = epd_from_tinydrm(tdev); + struct drm_clip_rect clip; u8 *buf = NULL; int ret = 0; + /* repaper can't do partial updates */ + clip.x1 = 0; + clip.x2 = fb->width; + clip.y1 = 0; + clip.y2 = fb->height; + mutex_lock(&tdev->dirty_lock); if (!epd->enabled) @@ -550,9 +560,21 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb, goto out_unlock; } - ret = tinydrm_xrgb8888_to_gray8(buf, fb); - if (ret) - goto out_unlock; + if (import_attach) { + ret = dma_buf_begin_cpu_access(import_attach->dmabuf, + DMA_FROM_DEVICE); + if (ret) + goto out_unlock; + } + + tinydrm_xrgb8888_to_gray8(buf, cma_obj->vaddr, fb, &clip); + + if (import_attach) { + ret = dma_buf_end_cpu_access(import_attach->dmabuf, + DMA_FROM_DEVICE); + if (ret) + goto out_unlock; + } repaper_gray8_to_mono_reversed(buf, fb->width, fb->height); diff --git a/include/drm/tinydrm/tinydrm-helpers.h b/include/drm/tinydrm/tinydrm-helpers.h index a6c387f91eff..d554ded60ee9 100644 --- a/include/drm/tinydrm/tinydrm-helpers.h +++ b/include/drm/tinydrm/tinydrm-helpers.h @@ -43,7 +43,8 @@ void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb, void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr, struct drm_framebuffer *fb, struct drm_clip_rect *clip, bool swap); -int tinydrm_xrgb8888_to_gray8(u8 *dst, struct drm_framebuffer *fb); +void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, + struct drm_clip_rect *clip); struct backlight_device *tinydrm_of_find_backlight(struct device *dev); int tinydrm_enable_backlight(struct backlight_device *backlight);