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Message-Id: <20250721-st7571-format-v2-1-159f4134098c@gmail.com> Date: Mon, 21 Jul 2025 12:43:31 +0200 From: Marcus Folkesson <marcus.folkesson@...il.com> To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Javier Martinez Canillas <javierm@...hat.com> Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, Marcus Folkesson <marcus.folkesson@...il.com> Subject: [PATCH v2 1/6] drm/st7571-i2c: correct pixel data format description 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. Reviewed-by: Javier Martinez Canillas <javierm@...hat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.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 453eb7e045e5fb5942720d6020b6279a4b7315d7..dfdd0fa4ff24090c3cbe7ab162285be45464d6a6 100644 --- a/drivers/gpu/drm/sitronix/st7571-i2c.c +++ b/drivers/gpu/drm/sitronix/st7571-i2c.c @@ -386,10 +386,10 @@ 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
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