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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2017-11-09 13:28:31 +0300 |
|---|---|---|
| committer | Andrzej Hajda <a.hajda@samsung.com> | 2017-11-16 15:47:35 +0300 |
| commit | e7c2e4d368e2efc8789b65d141fb633ebb163a70 (patch) | |
| tree | 1903a664ae252b2e23d0bd3df0b43d20bde0cb5c /drivers/gpu/drm/bridge | |
| parent | 460c3b0029923a44a398d4b44d62054c0c249600 (diff) | |
| download | linux-e7c2e4d368e2efc8789b65d141fb633ebb163a70.tar.xz | |
drm/bridge/sii8620: filter unsupported modes
The maximum pixel clock depends on the version of the connected MHL
adapter. Add mode_valid callback to filter out modes with too high pixel
clock to avoid failure in mode_fixup later.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171109102831.19844-1-m.szyprowski@samsung.com
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/sil-sii8620.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c index b7eb704d0a8a..268d66d99337 100644 --- a/drivers/gpu/drm/bridge/sil-sii8620.c +++ b/drivers/gpu/drm/bridge/sil-sii8620.c @@ -2191,6 +2191,19 @@ static void sii8620_detach(struct drm_bridge *bridge) rc_unregister_device(ctx->rc_dev); } +static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge, + const struct drm_display_mode *mode) +{ + struct sii8620 *ctx = bridge_to_sii8620(bridge); + bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] & + MHL_DCAP_VID_LINK_PPIXEL; + unsigned int max_pclk = sii8620_is_mhl3(ctx) ? MHL3_MAX_LCLK : + MHL1_MAX_LCLK; + max_pclk /= can_pack ? 2 : 3; + + return (mode->clock > max_pclk) ? MODE_CLOCK_HIGH : MODE_OK; +} + static bool sii8620_mode_fixup(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) @@ -2238,6 +2251,7 @@ static const struct drm_bridge_funcs sii8620_bridge_funcs = { .attach = sii8620_attach, .detach = sii8620_detach, .mode_fixup = sii8620_mode_fixup, + .mode_valid = sii8620_mode_valid, }; static int sii8620_probe(struct i2c_client *client, |