diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2022-11-17 12:28:49 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2022-11-24 14:42:39 +0300 |
| commit | 4fcd238560ee6724d6edcae95820bdf7f2e40ab1 (patch) | |
| tree | b09152213700d11923405f7cbced32eb6b550462 /include/drm/drm_modes.h | |
| parent | 7d63cd8526f1b70d1438b1aa90620cde941162c3 (diff) | |
| download | linux-4fcd238560ee6724d6edcae95820bdf7f2e40ab1.tar.xz | |
drm/modes: Add a function to generate analog display modes
Multiple drivers (meson, vc4, sun4i) define analog TV 525-lines and
625-lines modes in their drivers.
Since those modes are fairly standard, and that we'll need to use them
in more places in the future, it makes sense to move their definition
into the core framework.
However, analog display usually have fairly loose timings requirements,
the only discrete parameters being the total number of lines and pixel
clock frequency. Thus, we created a function that will create a display
mode from the standard, the pixel frequency and the active area.
Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Acked-in-principle-or-something-like-that-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v10-6-256dad125326@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Diffstat (limited to 'include/drm/drm_modes.h')
| -rw-r--r-- | include/drm/drm_modes.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h index b0c680e6f670..c613f0abe9dc 100644 --- a/include/drm/drm_modes.h +++ b/include/drm/drm_modes.h @@ -468,6 +468,23 @@ bool drm_mode_is_420_also(const struct drm_display_info *display, bool drm_mode_is_420(const struct drm_display_info *display, const struct drm_display_mode *mode); +struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev, + enum drm_connector_tv_mode mode, + unsigned long pixel_clock_hz, + unsigned int hdisplay, + unsigned int vdisplay, + bool interlace); + +static inline struct drm_display_mode *drm_mode_analog_ntsc_480i(struct drm_device *dev) +{ + return drm_analog_tv_mode(dev, DRM_MODE_TV_MODE_NTSC, 13500000, 720, 480, true); +} + +static inline struct drm_display_mode *drm_mode_analog_pal_576i(struct drm_device *dev) +{ + return drm_analog_tv_mode(dev, DRM_MODE_TV_MODE_PAL, 13500000, 720, 576, true); +} + struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, bool reduced, bool interlaced, |