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TV: save serveral TV_CTL register fields in mode set 

Driver should keep those fields according with spec.
This commit is contained in:
Zhenyu Wang 2008-10-29 20:32:18 +08:00
parent 2ae91f0ffd
commit b404afb755
2 changed files with 3 additions and 2 deletions
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2
src/i810_reg.h
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@ -1577,7 +1577,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
# define TV_ENC_C0_FIX (1 << 10)
/** Bits that must be preserved by software */
# define TV_CTL_SAVE ((3 << 8) | (3 << 6))
# define TV_CTL_SAVE ((1 << 11) | (3 << 9) | (7 << 6) | 0xf)
# define TV_FUSE_STATE_MASK (3 << 4)
/** Read-only state that reports all features enabled */
# define TV_FUSE_STATE_ENABLED (0 << 4)

3
src/i830_tv.c
View File

@ -1042,7 +1042,8 @@ i830_tv_mode_set(xf86OutputPtr output, DisplayModePtr mode,
if (!tv_mode)
return; /* can't happen (mode_prepare prevents this) */
tv_ctl = 0;
tv_ctl = INREG(TV_CTL);
tv_ctl &= TV_CTL_SAVE;
switch (dev_priv->type) {
default: