mirror of
https://gitlab.freedesktop.org/mesa/drm.git
synced 2026-05-15 06:58:08 +02:00
a2d588fe12
For the scenario where user may require to modeset with a mode supporting a fractional value for vertical refresh-rate, appropriate mode can be selected by searching for mode having matching fractional vertical refresh rate using below equation. vrefresh = (1000 * pixel clock) / (htotal * vtotal) Hz. We do this way since driver doesn't return float value of vrefresh as it use int for vrefresh in struct drm_mode_info, but we can derive the actual value using pixel clock, horizontal total size and vertical total size values. So for e.g. if user want to select mode having 59.94 Hz as refresh rate then with this patch it be can done as shown in below command, given there is an appropriate mode is available : modetest -M xlnx -s 39:1920x1080-59.94@BG24 -v NOTE: Above command was tested on xilinx DRM driver with DP monitor which was supporting mode having 59.94 Hz refresh rate. V2: Update commit message V3: Update with below changes as per review comments : 1) Use epsilon for vrefresh comparison 2) Use implicit type-casting wherever possible V4: Keep patch version history on main commit message Signed-off-by: Devarsh Thakkar <devarsh.thakkar@xilinx.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> |
||
|---|---|---|
| .. | ||
| amdgpu | ||
| etnaviv | ||
| exynos | ||
| kms | ||
| kmstest | ||
| modeprint | ||
| modetest | ||
| nouveau | ||
| proptest | ||
| radeon | ||
| tegra | ||
| ttmtest | ||
| util | ||
| vbltest | ||
| Android.mk | ||
| drmdevice.c | ||
| drmsl.c | ||
| hash.c | ||
| meson.build | ||
| random.c | ||