On Fri, May 05, 2017 at 12:50:51AM +0800, icenowy@xxxxxxx wrote: > > > +void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer, > > > + int layer, bool enable) > > > +{ > > > + u32 val; > > > + /* Currently the first UI channel is used */ > > > + int chan = mixer->cfg->vi_num; > > > + > > > + DRM_DEBUG_DRIVER("Enabling layer %d in channel %d\n", layer, chan); > > > + > > > + if (enable) > > > + val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN; > > > + else > > > + val = 0; > > > + > > > + regmap_update_bits(mixer->engine.regs, > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer), > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val); > > > + > > > + /* Set the alpha configuration */ > > > + regmap_update_bits(mixer->engine.regs, > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer), > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_MASK, > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_DEF); > > > + regmap_update_bits(mixer->engine.regs, > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer), > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MASK, > > > + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_DEF); > > > +} > > > > This one too. > > It's called from sun8i_layer.c, so it cannot be static. Fair enough. > > > + /* Set base coordinates */ > > > + DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n", > > > + state->crtc_x, state->crtc_y); > > > + regmap_write(mixer->engine.regs, > > > + SUN8I_MIXER_CHAN_UI_LAYER_COORD(chan, layer), > > > + SUN8I_MIXER_COORD(state->crtc_x, state->crtc_y)); > > > > X and Y are fixed point numbers. You want to keep only the higher 16 > > bits there. > > Do you mean "lower 16 bits"? Thus should I (x & 0xffff) or ((u16)x) ? Nevermind, I got confused with src_x and src_y. > P.S. The negative coordinates are broken, how should I deal with it? or > is the coordinates promised to be not negative? Adjust the buffer base address, and use a shorter line. You have such an example in the sun4i code. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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