Re: [RFC 2/4] drm/sun4i: Use CRTC size instead of PRIMARY plane size as mixer frame.

Jernej Škrabec
2019-12-29T09:20:45Z

Hi!

Dne sobota, 28. december 2019 ob 21:28:16 CET je
roman.stratiienko@globallogic.com napisal(a):
> From: Roman Stratiienko <roman.stratiienko@globallogic.com>
>
> According to DRM documentation the only difference between PRIMARY
> and OVERLAY plane is that each CRTC must have PRIMARY plane and
> OVERLAY are optional.
>
> Allow PRIMARY plane to have dimension different from full-screen.

I noticed this issue recently and I'm glad that you posted solution. Code is
fine, just few nitpicks and I think it would be better to split it in two
commits, one which adds callback and another which implements that callback in
sun8i-mixer. DE1 also needs this fix, but it can be posted later.

>
> Signed-off-by: Roman Stratiienko <roman.stratiienko@globallogic.com>
> ---
> drivers/gpu/drm/sun4i/sun4i_crtc.c | 4 +++
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 35 ++++++++++++++++++++++++++
> drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 30 ----------------------
> drivers/gpu/drm/sun4i/sunxi_engine.h | 8 ++++++
> 4 files changed, 47 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c
> b/drivers/gpu/drm/sun4i/sun4i_crtc.c index 3a153648b369..156ea8f19d7d
> 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
> @@ -139,8 +139,12 @@ static void sun4i_crtc_mode_set_nofb(struct drm_crtc
> *crtc) struct drm_display_mode *mode = &crtc->state->adjusted_mode;
> struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
> struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
> + struct sunxi_engine *engine = scrtc->engine;
>
> sun4i_tcon_mode_set(scrtc->tcon, encoder, mode);
> +
> + if (engine->ops->mode_set)
> + engine->ops->mode_set(engine, mode);
> }
>
> static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> b/drivers/gpu/drm/sun4i/sun8i_mixer.c index eea4813602b7..bb9a665fd053
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -257,6 +257,40 @@ const struct de2_fmt_info *sun8i_mixer_format_info(u32
> format) return NULL;
> }
>
> +static void sun8i_mode_set(struct sunxi_engine *engine,
> + struct drm_display_mode *mode)
> +{
> + u32 dst_w = mode->crtc_hdisplay;
> + u32 dst_h = mode->crtc_vdisplay;
> + u32 outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
> + bool interlaced = false;
> + u32 val;
> + struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
> + u32 bld_base = sun8i_blender_base(mixer);
> +
> + DRM_DEBUG_DRIVER("Mode change, updating global size W: %u H: %u\n",
> + dst_w, dst_h);

We should start using newly introduced helpers for DRM debug output, in this
case drm_dbg(), which replace those in in all caps.

> + regmap_write(mixer->engine.regs,
> + SUN8I_MIXER_GLOBAL_SIZE,
> + outsize);
> + regmap_write(mixer->engine.regs,
> + SUN8I_MIXER_BLEND_OUTSIZE(bld_base), outsize);
> +
> + interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
> +
> + if (interlaced)
> + val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
> + else
> + val = 0;
> +
> + regmap_update_bits(mixer->engine.regs,
> + SUN8I_MIXER_BLEND_OUTCTL(bld_base),
> + SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
> + val);
> + DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
> + interlaced ? "on" : "off");

Ditto.

> +}
> +
> static void sun8i_atomic_begin(struct sunxi_engine *engine,
> struct drm_crtc_state *old_state)
> {
> @@ -325,6 +359,7 @@ static const struct sunxi_engine_ops sun8i_engine_ops =
> { .commit = sun8i_mixer_commit,
> .layers_init = sun8i_layers_init,
> .atomic_begin = sun8i_atomic_begin,
> + .mode_set = sun8i_mode_set,
> };
>
> static struct regmap_config sun8i_mixer_regmap_config = {
> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c index c87fd842918e..893076716070
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> @@ -99,36 +99,6 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer
> *mixer, int channel, insize = SUN8I_MIXER_SIZE(src_w, src_h);
> outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
>
> - if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
> - bool interlaced = false;
> - u32 val;
> -
> - DRM_DEBUG_DRIVER("Primary layer, updating global size
W: %u H: %u\n",
> - dst_w, dst_h);
> - regmap_write(mixer->engine.regs,
> - SUN8I_MIXER_GLOBAL_SIZE,
> - outsize);
> - regmap_write(mixer->engine.regs,
> - SUN8I_MIXER_BLEND_OUTSIZE(bld_base),
outsize);
> -
> - if (state->crtc)
> - interlaced = state->crtc->state-
>adjusted_mode.flags
> - & DRM_MODE_FLAG_INTERLACE;
> -
> - if (interlaced)
> - val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
> - else
> - val = 0;
> -
> - regmap_update_bits(mixer->engine.regs,
> -
SUN8I_MIXER_BLEND_OUTCTL(bld_base),
> -
SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
> - val);
> -
> - DRM_DEBUG_DRIVER("Switching display mixer interlaced
mode %s\n",
> - interlaced ? "on" : "off");
> - }
> -
> /* Set height and width */
> DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
> state->src.x1 >> 16, state->src.y1 >> 16);
> diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h
> b/drivers/gpu/drm/sun4i/sunxi_engine.h index 548710a936d5..9783c112d512
> 100644
> --- a/drivers/gpu/drm/sun4i/sunxi_engine.h
> +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
> @@ -108,6 +108,14 @@ struct sunxi_engine_ops {
> * This function is optional.
> */
> void (*vblank_quirk)(struct sunxi_engine *engine);
> +
> + /**
> + * @mode_set:
> + *

Please add description.

Best regards,
Jernej

> + * This function is optional.
> + */
> + void (*mode_set)(struct sunxi_engine *engine,
> + struct drm_display_mode *mode);
> };
>
> /**