[PATCH] media: imx-jpeg: Fix occasional decoder fail on jpegs without DHT
From: Mirela Rabulea <mirela.rabulea@nxp.com>
Date: 2021-09-27 18:57:14
Also in:
linux-media, lkml
Subsystem:
media input infrastructure (v4l/dvb), the rest · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds
Add some body to the dummy jpeg used to inject a default DHT. Use jpeg_image_red as compressed image data, insert it at the end of SOS, before EOI. The pure dummy jpeg was occasionally not working well on 8qxp C0. Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com> Reviewed-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com> --- drivers/media/platform/imx-jpeg/mxc-jpeg.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
index b1678f94dccd..bd19a4b1bf08 100644
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c@@ -283,6 +283,20 @@ static const unsigned char jpeg_sos_maximal[] = { 0x11, 0x04, 0x11, 0x00, 0x3F, 0x00 }; +static const unsigned char jpeg_image_red[] = { + 0xFC, 0x5F, 0xA2, 0xBF, 0xCA, 0x73, 0xFE, 0xFE, + 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00, + 0x28, 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, + 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00, 0x28, + 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, + 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, + 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00, + 0x28, 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, + 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00, 0x28, + 0xA0, 0x02, 0x8A, 0x00, 0x28, 0xA0, 0x02, 0x8A, + 0x00, 0x28, 0xA0, 0x02, 0x8A, 0x00 +}; + static const unsigned char jpeg_eoi[] = { 0xFF, 0xD9 };
@@ -765,6 +779,9 @@ static unsigned int mxc_jpeg_setup_cfg_stream(void *cfg_stream_vaddr, sos = (struct mxc_jpeg_sos *)(cfg + offset); offset += mxc_jpeg_fixup_sos(sos, fourcc); + memcpy(cfg + offset, jpeg_image_red, sizeof(jpeg_image_red)); + offset += sizeof(jpeg_image_red); + memcpy(cfg + offset, jpeg_eoi, sizeof(jpeg_eoi)); offset += sizeof(jpeg_eoi);
--
2.25.1
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