From: Icenowy Zheng <icenowy@aosc.io>
To: linux-arm-kernel@lists.infradead.org,
Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: devicetree@vger.kernel.org, linux-sunxi@googlegroups.com,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Chen-Yu Tsai <wens@csie.org>, Rob Herring <robh+dt@kernel.org>,
linux-clk@vger.kernel.org
Subject: Re: [PATCH v6 08/13] drm/sun4i: add support for Allwinner DE2 mixers
Date: Fri, 05 May 2017 20:39:31 +0800 [thread overview]
Message-ID: <185C1948-541D-4198-9A56-E3F0DFF08734@aosc.io> (raw)
In-Reply-To: <20170505123618.5vztqx2vdwsgnrxt@lukather>
于 2017年5月5日 GMT+08:00 下午8:36:18, Maxime Ripard <maxime.ripard@free-electrons.com> 写到:
>On Fri, May 05, 2017 at 12:50:51AM +0800, icenowy@aosc.io 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.
Are they these two lines:
```
paddr += (state->src_x >> 16) * bpp;
paddr += (state->src_y >> 16) * fb->pitches[0];
```
I think I copied them here, so I don't need to mind this problem any more, right?
>
>Maxime
next prev parent reply other threads:[~2017-05-05 12:39 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-04 11:48 [PATCH v6 00/13] Initial Allwinner Display Engine 2.0 Support Icenowy Zheng
2017-05-04 11:48 ` [PATCH v6 01/13] dt-bindings: add binding for the Allwinner DE2 CCU Icenowy Zheng
2017-05-04 11:48 ` [PATCH v6 02/13] clk: sunxi-ng: add support for " Icenowy Zheng
2017-05-04 12:50 ` Maxime Ripard
2017-05-04 11:48 ` [PATCH v6 03/13] dt-bindings: add bindings for DE2 on V3s SoC Icenowy Zheng
2017-05-05 3:24 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 04/13] drm/sun4i: return only planes for layers created Icenowy Zheng
2017-05-04 11:48 ` [PATCH v6 05/13] drm/sun4i: abstract a engine type Icenowy Zheng
2017-05-05 2:56 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-05 8:36 ` icenowy
2017-05-05 8:38 ` Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 06/13] drm/sun4i: add a dedicated module for sun4i-backend and sun4i-layer Icenowy Zheng
2017-05-05 3:10 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 07/13] drm/sun4i: add a Kconfig option for sun4i-backend Icenowy Zheng
2017-05-05 3:14 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 08/13] drm/sun4i: add support for Allwinner DE2 mixers Icenowy Zheng
2017-05-04 13:05 ` Maxime Ripard
2017-05-04 16:50 ` icenowy
2017-05-04 16:57 ` icenowy
2017-05-04 17:14 ` icenowy
2017-05-05 12:36 ` Maxime Ripard
2017-05-05 12:39 ` Icenowy Zheng [this message]
2017-05-09 20:19 ` Maxime Ripard
2017-05-04 16:52 ` icenowy
2017-05-05 3:40 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 09/13] drm/sun4i: Add compatible string for V3s display engine Icenowy Zheng
2017-05-04 11:48 ` [PATCH v6 10/13] drm/sun4i: tcon: add support for V3s TCON Icenowy Zheng
2017-05-05 3:33 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 11/13] ARM: dts: sun8i: add DE2 nodes for V3s SoC Icenowy Zheng
2017-05-05 3:31 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-05 8:53 ` icenowy
2017-05-05 12:30 ` Maxime Ripard
2017-05-05 12:34 ` Icenowy Zheng
2017-05-09 19:26 ` Maxime Ripard
2017-05-04 11:48 ` [PATCH v6 12/13] ARM: dts: sun8i: add pinmux for LCD pins of " Icenowy Zheng
2017-05-05 3:25 ` [linux-sunxi] " Chen-Yu Tsai
2017-05-04 11:48 ` [PATCH v6 13/13] [DO NOT MERGE] ARM: dts: sun8i: enable LCD panel of Lichee Pi Zero Icenowy Zheng
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