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drm: ssd130x: Fix COM scan direction register mask

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The SSD130x's command to toggle COM scan direction uses bit 3 and only
bit 3 to set the direction of the scanout. The driver has an incorrect
GENMASK(3, 2), causing the setting to be set on bit 2, rendering it
ineffective.

Fix the mask to only bit 3, so that the requested setting is applied
correctly.

Fixes: a61732e808 ("drm: Add driver for Solomon SSD130x OLED displays")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220308160758.26060-1-wens@kernel.org
This commit is contained in:
Chen-Yu Tsai 2022-03-09 00:07:57 +08:00 committed by Javier Martinez Canillas
parent 14a28e79f5
commit efb37e66b7
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GPG key ID: C751E590D63F3D69
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/solomon/ssd130x.c
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@ -61,7 +61,7 @@
#define SSD130X_SET_COM_PINS_CONFIG 0xda
#define SSD130X_SET_VCOMH 0xdb
#define SSD130X_SET_COM_SCAN_DIR_MASK GENMASK(3, 2)
#define SSD130X_SET_COM_SCAN_DIR_MASK GENMASK(3, 3)
#define SSD130X_SET_COM_SCAN_DIR_SET(val) FIELD_PREP(SSD130X_SET_COM_SCAN_DIR_MASK, (val))
#define SSD130X_SET_CLOCK_DIV_MASK GENMASK(3, 0)
#define SSD130X_SET_CLOCK_DIV_SET(val) FIELD_PREP(SSD130X_SET_CLOCK_DIV_MASK, (val))