From e976b868f2f77eddf7f61d52dfe2a23075ae272d Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Fri, 19 Dec 2014 13:22:47 +0100 Subject: [PATCH] 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 Acked-by: Anatolij Gustschin --- drivers/video/videomodes.c | 40 ++++++++++++++++++++++++++++++++++++++ drivers/video/videomodes.h | 5 +++++ 2 files changed, 45 insertions(+) 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); +} diff --git a/drivers/video/videomodes.h b/drivers/video/videomodes.h index 579c6850f7..02419cdeac 100644 --- a/drivers/video/videomodes.h +++ b/drivers/video/videomodes.h @@ -79,3 +79,8 @@ int video_get_params (struct ctfb_res_modes *pPar, char *penv); int video_get_video_mode(unsigned int *xres, unsigned int *yres, unsigned int *depth, unsigned int *freq, const char **options); + +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); -- 2.25.1