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drm/i915: Generalize the CRC command format for future work

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Let's move from writing 'A plane1' to 'pipe A plane1' to
i915_pipe_crc_ctl. This will allow us to extend the interface to
transcoders or DDIs in the future.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-10-15 18:55:35 +01:00 committed by Daniel Vetter
parent e5f75aca19
commit b94dec877f
1 changed files with 43 additions and 13 deletions
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56
drivers/gpu/drm/i915/i915_debugfs.c
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@ -1864,14 +1864,15 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
/*
* Parse pipe CRC command strings:
* command: wsp* pipe wsp+ source wsp*
* pipe: (A | B | C)
* command: wsp* object wsp+ name wsp+ source wsp*
* object: 'pipe'
* name: (A | B | C)
* source: (none | plane1 | plane2 | pf)
* wsp: (#0x20 | #0x9 | #0xA)+
*
* eg.:
* "A plane1" -> Start CRC computations on plane1 of pipe A
* "A none" -> Stop CRC
* "pipe A plane1" -> Start CRC computations on plane1 of pipe A
* "pipe A none" -> Stop CRC
*/
static int pipe_crc_ctl_tokenize(char *buf, char *words[], int max_words)
{
@ -1904,6 +1905,28 @@ static int pipe_crc_ctl_tokenize(char *buf, char *words[], int max_words)
return n_words;
}
enum intel_pipe_crc_object {
PIPE_CRC_OBJECT_PIPE,
};
static const char *pipe_crc_objects[] = {
"pipe",
};
static int
pipe_crc_ctl_parse_object(const char *buf, enum intel_pipe_crc_object *object)
{
int i;
for (i = 0; i < ARRAY_SIZE(pipe_crc_objects); i++)
if (!strcmp(buf, pipe_crc_objects[i])) {
*object = i;
return 0;
}
return -EINVAL;
}
static int pipe_crc_ctl_parse_pipe(const char *buf, enum pipe *pipe)
{
const char name = buf[0];
@ -1932,25 +1955,32 @@ pipe_crc_ctl_parse_source(const char *buf, enum intel_pipe_crc_source *source)
static int pipe_crc_ctl_parse(struct drm_device *dev, char *buf, size_t len)
{
#define MAX_WORDS 2
#define N_WORDS 3
int n_words;
char *words[MAX_WORDS];
char *words[N_WORDS];
enum pipe pipe;
enum intel_pipe_crc_object object;
enum intel_pipe_crc_source source;
n_words = pipe_crc_ctl_tokenize(buf, words, MAX_WORDS);
if (n_words != 2) {
DRM_DEBUG_DRIVER("tokenize failed, a command is 2 words\n");
n_words = pipe_crc_ctl_tokenize(buf, words, N_WORDS);
if (n_words != N_WORDS) {
DRM_DEBUG_DRIVER("tokenize failed, a command is %d words\n",
N_WORDS);
return -EINVAL;
}
if (pipe_crc_ctl_parse_pipe(words[0], &pipe) < 0) {
DRM_DEBUG_DRIVER("unknown pipe %s\n", words[0]);
if (pipe_crc_ctl_parse_object(words[0], &object) < 0) {
DRM_DEBUG_DRIVER("unknown object %s\n", words[0]);
return -EINVAL;
}
if (pipe_crc_ctl_parse_source(words[1], &source) < 0) {
DRM_DEBUG_DRIVER("unknown source %s\n", words[1]);
if (pipe_crc_ctl_parse_pipe(words[1], &pipe) < 0) {
DRM_DEBUG_DRIVER("unknown pipe %s\n", words[1]);
return -EINVAL;
}
if (pipe_crc_ctl_parse_source(words[2], &source) < 0) {
DRM_DEBUG_DRIVER("unknown source %s\n", words[2]);
return -EINVAL;
}