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From: "Noralf Trønnes" <noralf@tronnes.org>
To: dri-devel@lists.freedesktop.org
Cc: peter@stuge.se, "Noralf Trønnes" <noralf@tronnes.org>
Subject: [PATCH v3 4/6] drm/gud: Add GUD_PIXEL_FORMAT_R8
Date: Wed, 29 Sep 2021 21:11:59 +0200	[thread overview]
Message-ID: <20210929191201.34456-5-noralf@tronnes.org> (raw)
In-Reply-To: <20210929191201.34456-1-noralf@tronnes.org>

Add support for 8-bit greyscale format.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
---
 drivers/gpu/drm/gud/gud_drv.c      | 2 ++
 drivers/gpu/drm/gud/gud_internal.h | 4 ++++
 drivers/gpu/drm/gud/gud_pipe.c     | 2 ++
 include/drm/gud.h                  | 4 ++--
 4 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/gud/gud_drv.c b/drivers/gpu/drm/gud/gud_drv.c
index eb4e08846da4..a8d76c76e868 100644
--- a/drivers/gpu/drm/gud/gud_drv.c
+++ b/drivers/gpu/drm/gud/gud_drv.c
@@ -523,6 +523,8 @@ static int gud_probe(struct usb_interface *intf, const struct usb_device_id *id)
 		switch (format) {
 		case GUD_DRM_FORMAT_R1:
 			fallthrough;
+		case DRM_FORMAT_R8:
+			fallthrough;
 		case GUD_DRM_FORMAT_XRGB1111:
 			if (!xrgb8888_emulation_format)
 				xrgb8888_emulation_format = info;
diff --git a/drivers/gpu/drm/gud/gud_internal.h b/drivers/gpu/drm/gud/gud_internal.h
index 2a388e27d5d7..8499e713dbbc 100644
--- a/drivers/gpu/drm/gud/gud_internal.h
+++ b/drivers/gpu/drm/gud/gud_internal.h
@@ -80,6 +80,8 @@ static inline u8 gud_from_fourcc(u32 fourcc)
 	switch (fourcc) {
 	case GUD_DRM_FORMAT_R1:
 		return GUD_PIXEL_FORMAT_R1;
+	case DRM_FORMAT_R8:
+		return GUD_PIXEL_FORMAT_R8;
 	case GUD_DRM_FORMAT_XRGB1111:
 		return GUD_PIXEL_FORMAT_XRGB1111;
 	case DRM_FORMAT_RGB565:
@@ -98,6 +100,8 @@ static inline u32 gud_to_fourcc(u8 format)
 	switch (format) {
 	case GUD_PIXEL_FORMAT_R1:
 		return GUD_DRM_FORMAT_R1;
+	case GUD_PIXEL_FORMAT_R8:
+		return DRM_FORMAT_R8;
 	case GUD_PIXEL_FORMAT_XRGB1111:
 		return GUD_DRM_FORMAT_XRGB1111;
 	case GUD_PIXEL_FORMAT_RGB565:
diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c
index b9b0e435ea0f..be4f95b2d59c 100644
--- a/drivers/gpu/drm/gud/gud_pipe.c
+++ b/drivers/gpu/drm/gud/gud_pipe.c
@@ -189,6 +189,8 @@ static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
 				ret = -ENOMEM;
 				goto end_cpu_access;
 			}
+		} else if (format->format == DRM_FORMAT_R8) {
+			drm_fb_xrgb8888_to_gray8(buf, vaddr, fb, rect);
 		} else if (format->format == DRM_FORMAT_RGB565) {
 			drm_fb_xrgb8888_to_rgb565(buf, vaddr, fb, rect, gud_is_big_endian());
 		} else {
diff --git a/include/drm/gud.h b/include/drm/gud.h
index 0b46b54fe56e..1dc781009e62 100644
--- a/include/drm/gud.h
+++ b/include/drm/gud.h
@@ -246,8 +246,8 @@ struct gud_state_req {
 /* Get supported pixel formats as a byte array of GUD_PIXEL_FORMAT_* */
 #define GUD_REQ_GET_FORMATS				0x40
   #define GUD_FORMATS_MAX_NUM			32
-  /* R1 is a 1-bit monochrome transfer format presented to userspace as XRGB8888 */
-  #define GUD_PIXEL_FORMAT_R1			0x01
+  #define GUD_PIXEL_FORMAT_R1			0x01 /* 1-bit monochrome */
+  #define GUD_PIXEL_FORMAT_R8			0x08 /* 8-bit greyscale */
   #define GUD_PIXEL_FORMAT_XRGB1111		0x20
   #define GUD_PIXEL_FORMAT_RGB565		0x40
   #define GUD_PIXEL_FORMAT_XRGB8888		0x80
-- 
2.32.0


  parent reply	other threads:[~2021-09-29 19:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-29 19:11 [PATCH v3 0/6] drm/gud: Add some more pixel formats Noralf Trønnes
2021-09-29 19:11 ` [PATCH v3 1/6] drm/fourcc: Add R8 to drm_format_info Noralf Trønnes
2021-09-29 19:11 ` [PATCH v3 2/6] drm/format-helper: Add drm_fb_xrgb8888_to_rgb332() Noralf Trønnes
2021-09-29 19:11 ` [PATCH v3 3/6] drm/format-helper: Add drm_fb_xrgb8888_to_rgb888() Noralf Trønnes
2021-09-29 19:11 ` Noralf Trønnes [this message]
2021-09-29 19:12 ` [PATCH v3 5/6] drm/gud: Add GUD_PIXEL_FORMAT_RGB332 Noralf Trønnes
2021-09-29 19:12 ` [PATCH v3 6/6] drm/gud: Add GUD_PIXEL_FORMAT_RGB888 Noralf Trønnes
2021-09-30  9:10 ` [PATCH v3 0/6] drm/gud: Add some more pixel formats Thomas Zimmermann
2021-10-01 13:02   ` Noralf Trønnes

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