From: Maxime Ripard Date: Fri, 18 Jan 2019 14:51:27 +0000 (+0100) Subject: drm/sun4i: Move access control before setting the register as documented X-Git-Tag: v5.1-rc1~23^2~27^2~11 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=94018601568c7bb9ff7ff1e861e7a6a5a49e2e29;p=linux-block.git 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 Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20190118145133.21281-18-paul.kocialkowski@bootlin.com --- 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)