diff options
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dbi.c')
| -rw-r--r-- | drivers/gpu/drm/drm_mipi_dbi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c index 9314f2ead79f..2f61f53d472f 100644 --- a/drivers/gpu/drm/drm_mipi_dbi.c +++ b/drivers/gpu/drm/drm_mipi_dbi.c @@ -5,6 +5,7 @@ * Copyright 2016 Noralf Trønnes */ +#include <linux/backlight.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> @@ -18,6 +19,7 @@ #include <drm/drm_file.h> #include <drm/drm_format_helper.h> #include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> #include <drm/drm_gem.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_mipi_dbi.h> @@ -1199,6 +1201,13 @@ int mipi_dbi_spi_transfer(struct spi_device *spi, u32 speed_hz, size_t chunk; int ret; + /* In __spi_validate, there's a validation that no partial transfers + * are accepted (xfer->len % w_size must be zero). + * Here we align max_chunk to multiple of 2 (16bits), + * to prevent transfers from being rejected. + */ + max_chunk = ALIGN_DOWN(max_chunk, 2); + spi_message_init_with_transfers(&m, &tr, 1); while (len) { |