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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-02-07 19:52:33 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-06-26 11:03:25 +0100 |
| commit | 92fbdfcd7d6b9db6b0a738c5bd85a4a9d731629d (patch) | |
| tree | 78ca1e767c6045558514455d3a7bbb0475a99887 | |
| parent | 713456db179356c6b32a50ea1910fc509615c457 (diff) | |
| download | linux-modsign-92fbdfcd7d6b9db6b0a738c5bd85a4a9d731629d.tar.gz | |
drm/i2c: tda998x: add some basic mode validation
The TDA998x can't handle modes with clocks above 150MHz, or resolutions
larger than 8192x2048.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | drivers/gpu/drm/i2c/tda998x_drv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index 3ff7d0713bfb6..5a738ad0c2416 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -810,6 +810,12 @@ static int tda998x_encoder_mode_valid(struct drm_encoder *encoder, struct drm_display_mode *mode) { + if (mode->clock > 150000) + return MODE_CLOCK_HIGH; + if (mode->htotal >= BIT(13)) + return MODE_BAD_HVALUE; + if (mode->vtotal >= BIT(11)) + return MODE_BAD_VVALUE; return MODE_OK; } |