diff options
Diffstat (limited to 'drivers/gpu/drm/tinydrm/core')
| -rw-r--r-- | drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c | 60 | ||||
| -rw-r--r-- | drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c | 5 |
2 files changed, 60 insertions, 5 deletions
diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c index d4cda3308ac7..bd6cce093a85 100644 --- a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c +++ b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c @@ -7,13 +7,15 @@ * (at your option) any later version. */ -#include <drm/tinydrm/tinydrm.h> -#include <drm/tinydrm/tinydrm-helpers.h> #include <linux/backlight.h> +#include <linux/dma-buf.h> #include <linux/pm.h> #include <linux/spi/spi.h> #include <linux/swab.h> +#include <drm/tinydrm/tinydrm.h> +#include <drm/tinydrm/tinydrm-helpers.h> + static unsigned int spi_max; module_param(spi_max, uint, 0400); MODULE_PARM_DESC(spi_max, "Set a lower SPI max transfer size"); @@ -181,6 +183,60 @@ void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr, 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 + * and use this function to convert to the native format. + * + * Monochrome drivers will use the most significant bit, + * where 1 means foreground color and 0 background color. + * + * ITU BT.601 is used for the RGB -> luma (brightness) conversion. + */ +void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, + struct drm_clip_rect *clip) +{ + 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; + /* + * The cma memory is write-combined so reads are uncached. + * Speed up by fetching one line at a time. + */ + buf = kmalloc(len, GFP_KERNEL); + if (!buf) + return; + + 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 = clip->x1; x < clip->x2; x++) { + u8 r = (*src & 0x00ff0000) >> 16; + u8 g = (*src & 0x0000ff00) >> 8; + u8 b = *src & 0x000000ff; + + /* ITU BT.601: Y = 0.299 R + 0.587 G + 0.114 B */ + *dst++ = (3 * r + 6 * g + b) / 10; + src++; + } + } + + kfree(buf); +} +EXPORT_SYMBOL(tinydrm_xrgb8888_to_gray8); + +/** * tinydrm_of_find_backlight - Find backlight device in device-tree * @dev: Device * diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c b/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c index ec43fb7ad9e4..177e9d861001 100644 --- a/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c +++ b/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c @@ -56,7 +56,7 @@ static const struct drm_connector_helper_funcs tinydrm_connector_hfuncs = { static enum drm_connector_status tinydrm_connector_detect(struct drm_connector *connector, bool force) { - if (drm_device_is_unplugged(connector->dev)) + if (drm_dev_is_unplugged(connector->dev)) return connector_status_disconnected; return connector->status; @@ -71,7 +71,6 @@ static void tinydrm_connector_destroy(struct drm_connector *connector) } static const struct drm_connector_funcs tinydrm_connector_funcs = { - .dpms = drm_atomic_helper_connector_dpms, .reset = drm_atomic_helper_connector_reset, .detect = tinydrm_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, @@ -225,7 +224,7 @@ tinydrm_display_pipe_init(struct tinydrm_device *tdev, return PTR_ERR(connector); ret = drm_simple_display_pipe_init(drm, &tdev->pipe, funcs, formats, - format_count, connector); + format_count, NULL, connector); if (ret) return ret; |