diff options
author | Hans de Goede <hdegoede@redhat.com> | 2014-12-19 13:22:47 +0100 |
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committer | Hans de Goede <hdegoede@redhat.com> | 2015-01-14 14:56:38 +0100 |
commit | e976b868f2f77eddf7f61d52dfe2a23075ae272d (patch) | |
tree | 10964743c2b1616a752cbb844579fe1ee4a08265 /drivers/video/videomodes.c | |
parent | 59bb610922257de60e3ece5c0f699bd929c4f1f6 (diff) |
videomodes: Add video_get_ctfb_res_modes helper function
Add a video_get_ctfb_res_modes() helper function, which uses
video_get_video_mode() to parse the 'video-mode' environment variable and then
looks up the matching mode in res_mode_init and returns the matching mode.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/video/videomodes.c')
-rw-r--r-- | drivers/video/videomodes.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/video/videomodes.c b/drivers/video/videomodes.c index 245917f189..45ccb36e84 100644 --- a/drivers/video/videomodes.c +++ b/drivers/video/videomodes.c @@ -275,3 +275,43 @@ int video_get_video_mode(unsigned int *xres, unsigned int *yres, return 1; } + +/* + * Parse the 'video-mode' environment variable using video_get_video_mode() + * and lookup the matching ctfb_res_modes in res_mode_init. + * + * @default_mode: RES_MODE_##x## define for the mode to store in mode_ret + * when 'video-mode' is not set or does not contain a valid mode + * @default_depth: depth to set when 'video-mode' is not set + * @mode_ret: pointer where the mode will be stored + * @depth_ret: pointer where the depth will be stored + * @options: pointer to any remaining options, or NULL + */ +void video_get_ctfb_res_modes(int default_mode, unsigned int default_depth, + const struct ctfb_res_modes **mode_ret, + unsigned int *depth_ret, + const char **options) +{ + unsigned int i, xres, yres, depth, refresh; + + *mode_ret = &res_mode_init[default_mode]; + *depth_ret = default_depth; + *options = NULL; + + if (!video_get_video_mode(&xres, &yres, &depth, &refresh, options)) + return; + + for (i = 0; i < RES_MODES_COUNT; i++) { + if (res_mode_init[i].xres == xres && + res_mode_init[i].yres == yres && + res_mode_init[i].refresh == refresh) { + *mode_ret = &res_mode_init[i]; + *depth_ret = depth; + return; + } + } + + printf("video-mode %dx%d-%d@%d not available, falling back to %dx%d-%d@%d\n", + xres, yres, depth, refresh, (*mode_ret)->xres, + (*mode_ret)->yres, *depth_ret, (*mode_ret)->refresh); +} |