diff options
| author | Robert Chiras <robert.chiras@nxp.com> | 2019-06-07 10:11:23 +0300 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2021-11-02 16:38:43 +0800 |
| commit | 6aac619d87c57a95ef8c60f99ad6fb1fc2233080 (patch) | |
| tree | f6998f6e59ac076cf469bf3f5b259b8274e2b0f0 /drivers/gpu/drm/bridge/adv7511 | |
| parent | d71532359489ce10016c43a0eead7105c16eaff8 (diff) | |
MLK-21958-13: drm/bridge: adv7511: Limit supported clocks
Some modes are not working with this converter. Until we find a real fix
to make any mode working, just limit the supported modes by their
clocks.
Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>
Diffstat (limited to 'drivers/gpu/drm/bridge/adv7511')
| -rw-r--r-- | drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 5683c2b0efa0..f4578788dc6b 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -76,6 +76,26 @@ static const uint8_t adv7511_register_defaults[] = { 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; +/* + * TODO: Currently, filter-out unsupported modes by their clocks. + * Need to find a better way to do this. + * These are the pixel clocks that the converter can handle successfully. + */ + +static const int valid_clocks[] = { + 148500, + 135000, + 132000, + 119000, + 108000, + 78750, + 74250, + 65000, + 49500, + 40000, + 31500, +}; + static bool adv7511_register_volatile(struct device *dev, unsigned int reg) { switch (reg) { @@ -697,9 +717,21 @@ adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector) static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511, struct drm_display_mode *mode) { + size_t i, num_modes = ARRAY_SIZE(valid_clocks); + bool clock_ok = false; + if (mode->clock > 165000) return MODE_CLOCK_HIGH; + for (i = 0; i < num_modes; i++) + if (mode->clock == valid_clocks[i]) { + clock_ok = true; + break; + } + + if (!clock_ok) + return MODE_NOCLOCK; + return MODE_OK; } |