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Message-ID: <20200901212929.xty2pvn3w4d5tkg4@core.my.home>
Date: Tue, 1 Sep 2020 23:29:29 +0200
From: Ondřej Jirman <megous@...ous.com>
To: Roman Stratiienko <r.stratiienko@...il.com>
Cc: jernej.skrabec@...l.net, jernej.skrabec@...il.com,
linux-sunxi@...glegroups.com, dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RFC: sun4i/drm: Swap back U and V channels for
DRM_FORMAT_YVU4xx
On Tue, Sep 01, 2020 at 11:30:47PM +0300, Roman Stratiienko wrote:
> Fixes: e1ef9006663b ("drm/sun4i: Wire in DE2 YUV support")
> Signed-off-by: Roman Stratiienko <r.stratiienko@...il.com>
>
> ---
> CC: megous@...ous.com
> CC: jernej.skrabec@...il.com
> CC: linux-sunxi@...glegroups.com
> CC: dri-devel@...ts.freedesktop.org
> CC: linux-arm-kernel@...ts.infradead.org
> CC: linux-kernel@...r.kernel.org
>
> Hi, this patch fixes wrong colors during video playback for me.
> Implemented ugly for now, please review/suggest how to improve.
Why do you think the issue is at DRM level? Have you tried displaying a known
color image via a vi layer, and was it wrong?
I used DRM with YUV data in the past, and didn't notice any weird colors,
so I'm a bit skeptical.
regards,
o.
> ---
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 8 +++++++-
> drivers/gpu/drm/sun4i/sun8i_mixer.h | 2 +-
> drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 2 +-
> drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 28 +++++++++++++++++++-------
> 4 files changed, 30 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> index dce40c430100..bbbeef44899a 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -31,6 +31,7 @@
> struct de2_fmt_info {
> u32 drm_fmt;
> u32 de2_fmt;
> + bool swap_uv;
> };
>
> static bool hw_preconfigured;
> @@ -219,14 +220,17 @@ static const struct de2_fmt_info de2_formats[] = {
> {
> .drm_fmt = DRM_FORMAT_YVU422,
> .de2_fmt = SUN8I_MIXER_FBFMT_YUV422,
> + .swap_uv = true,
> },
> {
> .drm_fmt = DRM_FORMAT_YVU420,
> .de2_fmt = SUN8I_MIXER_FBFMT_YUV420,
> + .swap_uv = true,
> },
> {
> .drm_fmt = DRM_FORMAT_YVU411,
> .de2_fmt = SUN8I_MIXER_FBFMT_YUV411,
> + .swap_uv = true,
> },
> {
> .drm_fmt = DRM_FORMAT_P010,
> @@ -238,13 +242,15 @@ static const struct de2_fmt_info de2_formats[] = {
> },
> };
>
> -int sun8i_mixer_drm_format_to_hw(u32 format, u32 *hw_format)
> +int sun8i_mixer_drm_format_to_hw(u32 format, u32 *hw_format, bool *swap_uv)
> {
> unsigned int i;
>
> for (i = 0; i < ARRAY_SIZE(de2_formats); ++i)
> if (de2_formats[i].drm_fmt == format) {
> *hw_format = de2_formats[i].de2_fmt;
> + if (swap_uv)
> + *swap_uv = de2_formats[i].swap_uv;
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> index 79a74bca1ea3..6358ffd251f9 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> @@ -207,5 +207,5 @@ sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
> return DE2_CH_BASE + channel * DE2_CH_SIZE;
> }
>
> -int sun8i_mixer_drm_format_to_hw(u32 format, u32 *hw_format);
> +int sun8i_mixer_drm_format_to_hw(u32 format, u32 *hw_format, bool *swap_uv);
> #endif /* _SUN8I_MIXER_H_ */
> diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> index a7f21f08ec89..57bbd9f1071c 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
> @@ -215,7 +215,7 @@ static int sun8i_ui_layer_update_formats(struct sun8i_mixer *mixer, int channel,
> ch_base = sun8i_channel_base(mixer, channel);
>
> fmt = state->fb->format;
> - ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt);
> + ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt, NULL);
> if (ret || fmt->is_yuv) {
> DRM_DEBUG_DRIVER("Invalid format\n");
> return -EINVAL;
> diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> index 3553e38ec642..4da51155c4d5 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
> @@ -313,7 +313,7 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
> ch_base = sun8i_channel_base(mixer, channel);
>
> fmt = state->fb->format;
> - ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt);
> + ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt, NULL);
> if (ret) {
> DRM_DEBUG_DRIVER("Invalid format\n");
> return ret;
> @@ -368,8 +368,17 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
> struct drm_gem_cma_object *gem;
> u32 dx, dy, src_x, src_y;
> dma_addr_t paddr;
> + bool swap_uv;
> u32 ch_base;
> - int i;
> + u32 hw_fmt;
> + int ret;
> + int i, j;
> +
> + ret = sun8i_mixer_drm_format_to_hw(plane->state->fb->format->format, &hw_fmt, &swap_uv);
> + if (ret) {
> + DRM_DEBUG_DRIVER("Invalid format\n");
> + return ret;
> + }
>
> ch_base = sun8i_channel_base(mixer, channel);
>
> @@ -377,7 +386,12 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
> src_x = (state->src.x1 >> 16) & ~(format->hsub - 1);
> src_y = (state->src.y1 >> 16) & ~(format->vsub - 1);
>
> - for (i = 0; i < format->num_planes; i++) {
> + for (j = 0; j < format->num_planes; j++) {
> + i = j;
> + if (swap_uv && i > 0 && format->num_planes == 3) {
> + i = j == 1 ? 2 : 1;
> + }
> +
> /* Get the physical address of the buffer in memory */
> gem = drm_fb_cma_get_gem_obj(fb, i);
>
> @@ -400,18 +414,18 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
>
> /* Set the line width */
> DRM_DEBUG_DRIVER("Layer %d. line width: %d bytes\n",
> - i + 1, fb->pitches[i]);
> + j + 1, fb->pitches[i]);
> regmap_write(mixer->engine.regs,
> SUN8I_MIXER_CHAN_VI_LAYER_PITCH(ch_base,
> - overlay, i),
> + overlay, j),
> fb->pitches[i]);
>
> DRM_DEBUG_DRIVER("Setting %d. buffer address to %pad\n",
> - i + 1, &paddr);
> + j + 1, &paddr);
>
> regmap_write(mixer->engine.regs,
> SUN8I_MIXER_CHAN_VI_LAYER_TOP_LADDR(ch_base,
> - overlay, i),
> + overlay, j),
> lower_32_bits(paddr));
> }
>
> --
> 2.25.1
>
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