diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2013-03-04 07:18:38 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-19 16:16:04 -0300 |
| commit | 1de1951930d4450d1645a0a907b710f268af42c3 (patch) | |
| tree | fafa302bede6d683050882b14ad3c48766ede5c1 /include/media | |
| parent | b12aed0ec518eb348ae0f6d196fd726c57670823 (diff) | |
[media] davinci/dm644x_ccdc: fix compiler warning
drivers/media/platform/davinci/dm644x_ccdc.c: In function ‘validate_ccdc_param’:
drivers/media/platform/davinci/dm644x_ccdc.c:233:32: warning: comparison between ‘enum ccdc_gama_width’ and ‘enum ccdc_data_size’ [-Wenum-compare]
It took a bit of work, see this thread of an earlier attempt to fix this:
https://patchwork.kernel.org/patch/1923091/
I've chosen not to follow the suggestions in that thread since gamma_width is
really a different property from data_size. What you really want is to know if
gamma_width fits inside data_size and for that you need to translate each
enum into a maximum bit number so you can safely compare the two.
So I put in two static inline translation functions instead, keeping the rest
of the code the same (except for fixing the 'gama' typo).
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/davinci/dm644x_ccdc.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/include/media/davinci/dm644x_ccdc.h b/include/media/davinci/dm644x_ccdc.h index 3e178eb52fb..852e96c4bb4 100644 --- a/include/media/davinci/dm644x_ccdc.h +++ b/include/media/davinci/dm644x_ccdc.h @@ -38,17 +38,23 @@ enum ccdc_sample_line { CCDC_SAMPLE_16LINES }; -/* enum for Alaw gama width */ -enum ccdc_gama_width { - CCDC_GAMMA_BITS_15_6, +/* enum for Alaw gamma width */ +enum ccdc_gamma_width { + CCDC_GAMMA_BITS_15_6, /* use bits 15-6 for gamma */ CCDC_GAMMA_BITS_14_5, CCDC_GAMMA_BITS_13_4, CCDC_GAMMA_BITS_12_3, CCDC_GAMMA_BITS_11_2, CCDC_GAMMA_BITS_10_1, - CCDC_GAMMA_BITS_09_0 + CCDC_GAMMA_BITS_09_0 /* use bits 9-0 for gamma */ }; +/* returns the highest bit used for the gamma */ +static inline u8 ccdc_gamma_width_max_bit(enum ccdc_gamma_width width) +{ + return 15 - width; +} + enum ccdc_data_size { CCDC_DATA_16BITS, CCDC_DATA_15BITS, @@ -60,12 +66,18 @@ enum ccdc_data_size { CCDC_DATA_8BITS }; +/* returns the highest bit used for this data size */ +static inline u8 ccdc_data_size_max_bit(enum ccdc_data_size sz) +{ + return sz == CCDC_DATA_8BITS ? 7 : 15 - sz; +} + /* structure for ALaw */ struct ccdc_a_law { /* Enable/disable A-Law */ unsigned char enable; - /* Gama Width Input */ - enum ccdc_gama_width gama_wd; + /* Gamma Width Input */ + enum ccdc_gamma_width gamma_wd; }; /* structure for Black Clamping */ |