media: s5p-jpeg: rename JPEG marker constants to prevent build warnings

The use of a macro named 'RST' conflicts with one of the same name
in arch/mips/include/asm/mach-rc32434/rb.h. This causes build
warnings on some MIPS builds.

Change the names of the JPEG marker constants to be in their own
namespace to fix these build warnings and to prevent other similar
problems in the future.

Fixes these build warnings:

In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c:14:
../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
   43 | #define RST                             0xd0
      |
../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
   13 | #define RST             (1 << 15)

In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-s5p.c:13:
../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
   43 | #define RST                             0xd0
../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
   13 | #define RST             (1 << 15)

In file included from ../drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c:12:
../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
   43 | #define RST                             0xd0
../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
   13 | #define RST             (1 << 15)

In file included from ../drivers/media/platform/s5p-jpeg/jpeg-core.c:31:
../drivers/media/platform/s5p-jpeg/jpeg-core.h:43: warning: "RST" redefined
   43 | #define RST                             0xd0
../arch/mips/include/asm/mach-rc32434/rb.h:13: note: this is the location of the previous definition
   13 | #define RST             (1 << 15)

Also update the kernel-doc so that the word "marker" is not
repeated.

Link: https://lore.kernel.org/linux-media/20210907044022.30602-1-rdunlap@infradead.org
Fixes: bb677f3ac434 ("[media] Exynos4 JPEG codec v4l2 driver")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 1faff03..ebdfd24 100644 (file)
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1140,8 +1140,8 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
                        continue;
                length = 0;
                switch (c) {
-               /* SOF0: baseline JPEG */
-               case SOF0:
+               /* JPEG_MARKER_SOF0: baseline JPEG */
+               case JPEG_MARKER_SOF0:
                        if (get_word_be(&jpeg_buffer, &word))
                                break;
                        length = (long)word - 2;
@@ -1172,7 +1172,7 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
                        notfound = 0;
                        break;
 
-               case DQT:
+               case JPEG_MARKER_DQT:
                        if (get_word_be(&jpeg_buffer, &word))
                                break;
                        length = (long)word - 2;
@@ -1185,7 +1185,7 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
                        skip(&jpeg_buffer, length);
                        break;
 
-               case DHT:
+               case JPEG_MARKER_DHT:
                        if (get_word_be(&jpeg_buffer, &word))
                                break;
                        length = (long)word - 2;
@@ -1198,15 +1198,15 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
                        skip(&jpeg_buffer, length);
                        break;
 
-               case SOS:
+               case JPEG_MARKER_SOS:
                        sos = jpeg_buffer.curr - 2; /* 0xffda */
                        break;
 
                /* skip payload-less markers */
-               case RST ... RST + 7:
-               case SOI:
-               case EOI:
-               case TEM:
+               case JPEG_MARKER_RST ... JPEG_MARKER_RST + 7:
+               case JPEG_MARKER_SOI:
+               case JPEG_MARKER_EOI:
+               case JPEG_MARKER_TEM:
                        break;
 
                /* skip uninteresting payload markers */

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.h b/drivers/media/platform/s5p-jpeg/jpeg-core.h
index a77d93c..8473a01 100644 (file)
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.h
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.h
@@ -37,15 +37,15 @@
 #define EXYNOS3250_IRQ_TIMEOUT         0x10000000
 
 /* a selection of JPEG markers */
-#define TEM                            0x01
-#define SOF0                           0xc0
-#define DHT                            0xc4
-#define RST                            0xd0
-#define SOI                            0xd8
-#define EOI                            0xd9
-#define        SOS                             0xda
-#define DQT                            0xdb
-#define DHP                            0xde
+#define JPEG_MARKER_TEM                                0x01
+#define JPEG_MARKER_SOF0                               0xc0
+#define JPEG_MARKER_DHT                                0xc4
+#define JPEG_MARKER_RST                                0xd0
+#define JPEG_MARKER_SOI                                0xd8
+#define JPEG_MARKER_EOI                                0xd9
+#define        JPEG_MARKER_SOS                         0xda
+#define JPEG_MARKER_DQT                                0xdb
+#define JPEG_MARKER_DHP                                0xde
 
 /* Flags that indicate a format can be used for capture/output */
 #define SJPEG_FMT_FLAG_ENC_CAPTURE     (1 << 0)
@@ -187,11 +187,11 @@ struct s5p_jpeg_marker {
  * @fmt:       driver-specific format of this queue
  * @w:         image width
  * @h:         image height
- * @sos:       SOS marker's position relative to the buffer beginning
- * @dht:       DHT markers' positions relative to the buffer beginning
- * @dqt:       DQT markers' positions relative to the buffer beginning
- * @sof:       SOF0 marker's position relative to the buffer beginning
- * @sof_len:   SOF0 marker's payload length (without length field itself)
+ * @sos:       JPEG_MARKER_SOS's position relative to the buffer beginning
+ * @dht:       JPEG_MARKER_DHT' positions relative to the buffer beginning
+ * @dqt:       JPEG_MARKER_DQT' positions relative to the buffer beginning
+ * @sof:       JPEG_MARKER_SOF0's position relative to the buffer beginning
+ * @sof_len:   JPEG_MARKER_SOF0's payload length (without length field itself)
  * @size:      image buffer size in bytes
  */
 struct s5p_jpeg_q_data {