diff options
| author | Maxime Ripard <[email protected]> | 2019-01-18 15:51:27 +0100 |
|---|---|---|
| committer | Maxime Ripard <[email protected]> | 2019-01-18 21:11:47 +0100 |
| commit | 94018601568c7bb9ff7ff1e861e7a6a5a49e2e29 (patch) | |
| tree | 5bd4f6584528f367052d7a84512ea653e4d6bd23 | |
| parent | 9db9c0cf5895e4ddde2814360cae7bea9282edd2 (diff) | |
drm/sun4i: Move access control before setting the register as documented
Unlike what is currently being done, the ACCESS_CTRL bit documentation asks
that this bit should be set before modifying any register. The code in the
BSP also does this, so make sure we do this as well.
Reviewed-by: Paul Kocialkowski <[email protected]>
Signed-off-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_frontend.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c index 1153539f3aef..88ac77518610 100644 --- a/drivers/gpu/drm/sun4i/sun4i_frontend.c +++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c @@ -75,6 +75,10 @@ static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend) { int i; + regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG, + SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL, + SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL); + for (i = 0; i < 32; i++) { regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZCOEF0_REG(i), sun4i_frontend_horz_coef[2 * i]); @@ -90,9 +94,6 @@ static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend) sun4i_frontend_vert_coef[i]); } - regmap_update_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG, - SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL, - SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL); } int sun4i_frontend_init(struct sun4i_frontend *frontend) |