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From: Marcus Folkesson <marcus.folkesson@gmail.com>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	 Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	 David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>,  Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	 Conor Dooley <conor+dt@kernel.org>,
	 Javier Martinez Canillas <javierm@redhat.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	 devicetree@vger.kernel.org,
	Marcus Folkesson <marcus.folkesson@gmail.com>
Subject: [PATCH 1/5] drm/st7571-i2c: correct pixel data format description
Date: Mon, 14 Jul 2025 10:03:59 +0200	[thread overview]
Message-ID: <20250714-st7571-format-v1-1-a27e5112baff@gmail.com> (raw)
In-Reply-To: <20250714-st7571-format-v1-0-a27e5112baff@gmail.com>

The comment describes the pixel data format as stated in
the st7571 datasheet, which is not necessary the same
as for the connected display.

Instead, describe the expected pixel data format which is used for
R1/R2/XRGB8888.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
 drivers/gpu/drm/sitronix/st7571-i2c.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/sitronix/st7571-i2c.c b/drivers/gpu/drm/sitronix/st7571-i2c.c
index eec846892962dce2d0b86c9c5c226d44135f2b0d..3024c94c890497d1ddbbf0f7f81ec4664f48d580 100644
--- a/drivers/gpu/drm/sitronix/st7571-i2c.c
+++ b/drivers/gpu/drm/sitronix/st7571-i2c.c
@@ -382,10 +382,10 @@ static int st7571_fb_update_rect_grayscale(struct drm_framebuffer *fb, struct dr
 			 * even if the format is monochrome.
 			 *
 			 * The bit values maps to the following grayscale:
-			 * 0 0 = White
-			 * 0 1 = Light gray
-			 * 1 0 = Dark gray
-			 * 1 1 = Black
+			 * 0 0 = Black
+			 * 0 1 = Dark gray
+			 * 1 0 = Light gray
+			 * 1 1 = White
 			 *
 			 * For monochrome formats, write the same value twice to get
 			 * either a black or white pixel.

-- 
2.49.0


  reply	other threads:[~2025-07-14  8:04 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-14  8:03 [PATCH 0/5] drm/st7571-i2c: add support for grayscale xrgb8888 Marcus Folkesson
2025-07-14  8:03 ` Marcus Folkesson [this message]
2025-07-14 10:48   ` [PATCH 1/5] drm/st7571-i2c: correct pixel data format description Javier Martinez Canillas
2025-07-14  8:04 ` [PATCH 2/5] dt-bindings: display: sitronix,st7571: add optional inverted property Marcus Folkesson
2025-07-14 10:51   ` Javier Martinez Canillas
2025-07-14 11:01     ` Marcus Folkesson
2025-07-15  3:39   ` Rob Herring
2025-07-14  8:04 ` [PATCH 3/5] drm/st7571-i2c: add support inverted pixel format Marcus Folkesson
2025-07-14 10:51   ` Javier Martinez Canillas
2025-07-14  8:04 ` [PATCH 4/5] drm/format-helper: introduce drm_fb_xrgb8888_to_gray2() Marcus Folkesson
2025-07-14  9:13   ` Thomas Zimmermann
2025-07-14  9:53     ` Marcus Folkesson
2025-07-14  8:04 ` [PATCH 5/5] drm/st7571-i2c: add support for 2bit grayscale for XRGB8888 Marcus Folkesson
2025-07-14 10:56   ` Javier Martinez Canillas

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