From: Javier Martinez Canillas <javierm@redhat.com> To: linux-kernel@vger.kernel.org Cc: linux-fbdev@vger.kernel.org, "Maxime Ripard" <maxime@cerno.tech>, "Daniel Vetter" <daniel.vetter@ffwll.ch>, "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>, dri-devel@lists.freedesktop.org, "Noralf Trønnes" <noralf@tronnes.org>, "Geert Uytterhoeven" <geert@linux-m68k.org>, "Javier Martinez Canillas" <javierm@redhat.com>, "Daniel Vetter" <daniel@ffwll.ch>, "David Airlie" <airlied@linux.ie>, "Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>, "Maxime Ripard" <mripard@kernel.org>, "Thomas Zimmermann" <tzimmermann@suse.de> Subject: [PATCH 2/4] drm/format-helper: Add drm_fb_gray8_to_mono_reversed() Date: Mon, 31 Jan 2022 21:12:22 +0100 [thread overview] Message-ID: <20220131201225.2324984-3-javierm@redhat.com> (raw) In-Reply-To: <20220131201225.2324984-1-javierm@redhat.com> Add support to convert 8-bit grayscale to reversed monochrome for drivers that control monochromatic displays, that only have 1 bit per pixel depth. This helper function was based on repaper_gray8_to_mono_reversed() from the drivers/gpu/drm/tiny/repaper.c driver. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> --- drivers/gpu/drm/drm_format_helper.c | 35 +++++++++++++++++++++++++++++ include/drm/drm_format_helper.h | 2 ++ 2 files changed, 37 insertions(+) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 0f28dd2bdd72..bf477c136082 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -584,3 +584,38 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for return -EINVAL; } EXPORT_SYMBOL(drm_fb_blit_toio); + +/** + * drm_fb_gray8_to_mono_reversed - Convert grayscale to reversed monochrome + * @dst: reversed monochrome destination buffer + * @src: 8-bit grayscale source buffer + * @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 drm_fb_xrgb8888_to_gray8() to convert to grayscale and then this + * helper function to convert to the native format. + */ +void drm_fb_gray8_to_mono_reversed(void *dst, void *src, const struct drm_rect *clip) +{ + size_t width = drm_rect_width(clip); + size_t height = drm_rect_width(clip); + + u8 *mono = dst, *gray8 = src; + unsigned int y, xb, i; + + for (y = 0; y < height; y++) + for (xb = 0; xb < width / 8; xb++) { + u8 byte = 0x00; + + for (i = 0; i < 8; i++) { + int x = xb * 8 + i; + + byte >>= 1; + if (gray8[y * width + x] >> 7) + byte |= BIT(7); + } + *mono++ = byte; + } +} +EXPORT_SYMBOL(drm_fb_gray8_to_mono_reversed); diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index b30ed5de0a33..cd4c8b7c78de 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -43,4 +43,6 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for const void *vmap, const struct drm_framebuffer *fb, const struct drm_rect *rect); +void drm_fb_gray8_to_mono_reversed(void *dst, void *vaddr, const struct drm_rect *clip); + #endif /* __LINUX_DRM_FORMAT_HELPER_H */ -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Javier Martinez Canillas <javierm@redhat.com> To: linux-kernel@vger.kernel.org Cc: linux-fbdev@vger.kernel.org, "Thomas Zimmermann" <tzimmermann@suse.de>, "David Airlie" <airlied@linux.ie>, "Daniel Vetter" <daniel.vetter@ffwll.ch>, "Javier Martinez Canillas" <javierm@redhat.com>, dri-devel@lists.freedesktop.org, "Noralf Trønnes" <noralf@tronnes.org>, "Geert Uytterhoeven" <geert@linux-m68k.org>, "Maxime Ripard" <maxime@cerno.tech>, "Andy Shevchenko" <andriy.shevchenko@linux.intel.com> Subject: [PATCH 2/4] drm/format-helper: Add drm_fb_gray8_to_mono_reversed() Date: Mon, 31 Jan 2022 21:12:22 +0100 [thread overview] Message-ID: <20220131201225.2324984-3-javierm@redhat.com> (raw) In-Reply-To: <20220131201225.2324984-1-javierm@redhat.com> Add support to convert 8-bit grayscale to reversed monochrome for drivers that control monochromatic displays, that only have 1 bit per pixel depth. This helper function was based on repaper_gray8_to_mono_reversed() from the drivers/gpu/drm/tiny/repaper.c driver. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> --- drivers/gpu/drm/drm_format_helper.c | 35 +++++++++++++++++++++++++++++ include/drm/drm_format_helper.h | 2 ++ 2 files changed, 37 insertions(+) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 0f28dd2bdd72..bf477c136082 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -584,3 +584,38 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for return -EINVAL; } EXPORT_SYMBOL(drm_fb_blit_toio); + +/** + * drm_fb_gray8_to_mono_reversed - Convert grayscale to reversed monochrome + * @dst: reversed monochrome destination buffer + * @src: 8-bit grayscale source buffer + * @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 drm_fb_xrgb8888_to_gray8() to convert to grayscale and then this + * helper function to convert to the native format. + */ +void drm_fb_gray8_to_mono_reversed(void *dst, void *src, const struct drm_rect *clip) +{ + size_t width = drm_rect_width(clip); + size_t height = drm_rect_width(clip); + + u8 *mono = dst, *gray8 = src; + unsigned int y, xb, i; + + for (y = 0; y < height; y++) + for (xb = 0; xb < width / 8; xb++) { + u8 byte = 0x00; + + for (i = 0; i < 8; i++) { + int x = xb * 8 + i; + + byte >>= 1; + if (gray8[y * width + x] >> 7) + byte |= BIT(7); + } + *mono++ = byte; + } +} +EXPORT_SYMBOL(drm_fb_gray8_to_mono_reversed); diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index b30ed5de0a33..cd4c8b7c78de 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -43,4 +43,6 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for const void *vmap, const struct drm_framebuffer *fb, const struct drm_rect *rect); +void drm_fb_gray8_to_mono_reversed(void *dst, void *vaddr, const struct drm_rect *clip); + #endif /* __LINUX_DRM_FORMAT_HELPER_H */ -- 2.34.1
next prev parent reply other threads:[~2022-01-31 20:12 UTC|newest] Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-31 20:12 [PATCH 0/4] drm/tiny: Add driver for Solomon SSD1307 OLED displays Javier Martinez Canillas 2022-01-31 20:12 ` Javier Martinez Canillas 2022-01-31 20:12 ` [PATCH 1/4] drm: Add I2C connector type Javier Martinez Canillas 2022-01-31 20:12 ` Javier Martinez Canillas 2022-01-31 20:52 ` Sam Ravnborg 2022-01-31 23:26 ` Javier Martinez Canillas 2022-01-31 23:26 ` Javier Martinez Canillas 2022-02-01 12:58 ` Noralf Trønnes 2022-02-01 12:58 ` Noralf Trønnes 2022-02-01 13:06 ` Javier Martinez Canillas 2022-02-01 13:20 ` Noralf Trønnes 2022-02-01 13:55 ` Javier Martinez Canillas 2022-02-01 13:38 ` Simon Ser 2022-02-01 13:38 ` Simon Ser 2022-02-01 14:20 ` Noralf Trønnes 2022-02-01 14:20 ` Noralf Trønnes 2022-02-01 20:57 ` Sam Ravnborg 2022-02-01 22:29 ` Simon Ser 2022-02-01 22:29 ` Simon Ser 2022-02-02 8:46 ` Javier Martinez Canillas 2022-02-02 8:46 ` Javier Martinez Canillas 2022-02-02 9:14 ` Thomas Zimmermann 2022-02-02 9:14 ` Thomas Zimmermann 2022-02-02 9:45 ` Noralf Trønnes 2022-02-02 9:45 ` Noralf Trønnes 2022-02-02 15:04 ` Pekka Paalanen 2022-02-02 15:04 ` Pekka Paalanen 2022-02-02 16:00 ` Noralf Trønnes 2022-02-02 16:00 ` Noralf Trønnes 2022-01-31 20:12 ` Javier Martinez Canillas [this message] 2022-01-31 20:12 ` [PATCH 2/4] drm/format-helper: Add drm_fb_gray8_to_mono_reversed() Javier Martinez Canillas 2022-02-01 9:59 ` Thomas Zimmermann 2022-02-01 9:59 ` Thomas Zimmermann 2022-02-01 11:13 ` Pekka Paalanen 2022-02-01 11:13 ` Pekka Paalanen 2022-02-01 11:48 ` Javier Martinez Canillas 2022-02-01 11:48 ` Javier Martinez Canillas 2022-03-14 13:40 ` Geert Uytterhoeven 2022-03-14 13:40 ` Geert Uytterhoeven 2022-03-14 14:07 ` Javier Martinez Canillas 2022-03-14 14:07 ` Javier Martinez Canillas 2022-01-31 20:36 ` [PATCH 0/4] drm/tiny: Add driver for Solomon SSD1307 OLED displays Simon Ser 2022-01-31 20:36 ` Simon Ser 2022-01-31 20:39 ` Simon Ser 2022-01-31 20:39 ` Simon Ser 2022-01-31 23:21 ` Javier Martinez Canillas 2022-01-31 23:21 ` Javier Martinez Canillas 2022-02-01 8:26 ` Geert Uytterhoeven 2022-02-01 8:26 ` Geert Uytterhoeven 2022-02-01 8:34 ` Simon Ser 2022-02-01 8:34 ` Simon Ser 2022-02-01 8:36 ` Geert Uytterhoeven 2022-02-01 8:36 ` Geert Uytterhoeven 2022-02-01 10:08 ` Thomas Zimmermann 2022-02-01 10:08 ` Thomas Zimmermann 2022-02-01 10:11 ` Simon Ser 2022-02-01 10:11 ` Simon Ser 2022-02-01 10:17 ` Thomas Zimmermann 2022-02-01 10:17 ` Thomas Zimmermann 2022-02-01 8:38 ` Daniel Vetter 2022-02-01 8:38 ` Daniel Vetter 2022-02-01 9:49 ` Javier Martinez Canillas 2022-02-01 9:49 ` Javier Martinez Canillas 2022-02-01 10:42 ` Pekka Paalanen 2022-02-01 10:42 ` Pekka Paalanen 2022-02-01 11:07 ` Geert Uytterhoeven 2022-02-01 11:07 ` Geert Uytterhoeven 2022-02-02 9:19 ` Pekka Paalanen 2022-02-02 9:19 ` Pekka Paalanen 2022-02-02 10:55 ` Geert Uytterhoeven 2022-02-02 10:55 ` Geert Uytterhoeven 2022-01-31 20:56 ` Sam Ravnborg 2022-01-31 23:37 ` Javier Martinez Canillas 2022-01-31 23:37 ` Javier Martinez Canillas 2022-02-01 9:37 ` Andy Shevchenko 2022-02-01 9:37 ` Andy Shevchenko 2022-02-01 11:31 ` Javier Martinez Canillas 2022-02-01 11:31 ` Javier Martinez Canillas 2022-02-01 11:38 ` Geert Uytterhoeven 2022-02-01 11:38 ` Geert Uytterhoeven 2022-02-01 13:09 ` Javier Martinez Canillas 2022-02-01 13:09 ` Javier Martinez Canillas 2022-02-01 14:14 ` Geert Uytterhoeven 2022-02-01 14:14 ` Geert Uytterhoeven 2022-02-01 15:03 ` Javier Martinez Canillas 2022-02-01 15:03 ` Javier Martinez Canillas 2022-02-01 20:40 ` Sam Ravnborg 2022-02-01 20:40 ` Sam Ravnborg 2022-02-02 8:38 ` Javier Martinez Canillas 2022-02-02 8:38 ` Javier Martinez Canillas 2022-02-02 11:06 ` Andy Shevchenko 2022-02-02 11:06 ` Andy Shevchenko 2022-02-02 11:39 ` Javier Martinez Canillas 2022-02-02 11:39 ` Javier Martinez Canillas 2022-02-02 11:50 ` Andy Shevchenko 2022-02-02 11:50 ` Andy Shevchenko 2022-02-02 11:54 ` Javier Martinez Canillas 2022-02-02 11:54 ` Javier Martinez Canillas 2022-02-02 12:21 ` Andy Shevchenko 2022-02-02 12:21 ` Andy Shevchenko 2022-02-01 8:43 ` Geert Uytterhoeven 2022-02-01 8:43 ` Geert Uytterhoeven 2022-02-01 9:27 ` Simon Ser 2022-02-01 9:27 ` Simon Ser 2022-02-01 10:36 ` Javier Martinez Canillas 2022-02-01 10:36 ` Javier Martinez Canillas
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