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Message-Id: <QZG9TQ.LU7WK53ECH511@crapouillou.net>
Date: Mon, 17 May 2021 18:09:26 +0100
From: Paul Cercueil <paul@...pouillou.net>
To: quanyang.wang@...driver.com
Cc: Hyun Kwon <hyun.kwon@...inx.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Michal Simek <michal.simek@...inx.com>,
dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] drm: xlnx: consolidate the functions which
programming AUDIO_VIDEO_SELECT register
Hi,
Le jeu., mai 13 2021 at 19:45:40 +0800, quanyang.wang@...driver.com a
écrit :
> From: Quanyang Wang <quanyang.wang@...driver.com>
>
> For now, the functions zynqmp_disp_avbuf_enable/disable_audio and
> zynqmp_disp_avbuf_enable/disable_video are all programming the
> register
> AV_BUF_OUTPUT_AUDIO_VIDEO_SELECT to select the output for audio or
> video.
> And in the future, many drm properties (like video_tpg, audio_tpg,
> audio_pl, etc) also need to access it. So let's introduce some
> variables
> of enum type and consolidate the code to unify handling this.
>
> Signed-off-by: Quanyang Wang <quanyang.wang@...driver.com>
> ---
> drivers/gpu/drm/xlnx/zynqmp_disp.c | 166
> ++++++++++++++----------
> drivers/gpu/drm/xlnx/zynqmp_disp_regs.h | 15 +--
> 2 files changed, 101 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index c55e24412f8c..a82bc88a98aa 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -102,12 +102,39 @@ enum zynqmp_disp_layer_id {
>
> /**
> * enum zynqmp_disp_layer_mode - Layer mode
> - * @ZYNQMP_DISP_LAYER_NONLIVE: non-live (memory) mode
> + * @ZYNQMP_DISP_LAYER_MEM: memory mode
> * @ZYNQMP_DISP_LAYER_LIVE: live (stream) mode
> + * @ZYNQMP_DISP_LAYER_TPG: tpg mode (only for video layer)
> + * @ZYNQMP_DISP_LAYER_DISABLE: disable mode
> */
> enum zynqmp_disp_layer_mode {
> - ZYNQMP_DISP_LAYER_NONLIVE,
> - ZYNQMP_DISP_LAYER_LIVE
> + ZYNQMP_DISP_LAYER_MEM,
> + ZYNQMP_DISP_LAYER_LIVE,
> + ZYNQMP_DISP_LAYER_TPG,
> + ZYNQMP_DISP_LAYER_DISABLE
> +};
> +
> +enum avbuf_vid_mode {
> + VID_MODE_LIVE,
> + VID_MODE_MEM,
> + VID_MODE_TPG,
> + VID_MODE_NONE
> +};
> +
> +enum avbuf_gfx_mode {
> + GFX_MODE_DISABLE,
> + GFX_MODE_MEM,
> + GFX_MODE_LIVE,
> + GFX_MODE_NONE
> +};
> +
> +enum avbuf_aud_mode {
> + AUD1_MODE_LIVE,
> + AUD1_MODE_MEM,
> + AUD1_MODE_TPG,
> + AUD1_MODE_DISABLE,
> + AUD2_MODE_DISABLE,
> + AUD2_MODE_ENABLE
> };
>
> /**
> @@ -542,92 +569,98 @@ static void
> zynqmp_disp_avbuf_disable_channels(struct zynqmp_disp_avbuf *avbuf)
> }
>
> /**
> - * zynqmp_disp_avbuf_enable_audio - Enable audio
> + * zynqmp_disp_avbuf_output_select - Select the buffer manager
> outputs
> * @avbuf: Audio/video buffer manager
> + * @layer: The layer
> + * @mode: The mode for this layer
> *
> - * Enable all audio buffers with a non-live (memory) source.
> + * Select the buffer manager outputs for @layer.
> */
> -static void zynqmp_disp_avbuf_enable_audio(struct zynqmp_disp_avbuf
> *avbuf)
> +static void zynqmp_disp_avbuf_output_select(struct zynqmp_disp_avbuf
> *avbuf,
> + struct zynqmp_disp_layer *layer, u32 mode)
You can put 'mode' on a new line to avoid getting over 80 characters.
> {
> - u32 val;
> -
> - val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
> - zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
> + u32 reg;
> +
> + reg = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
Empty line here (spacing before comment)
> + /* Select audio mode when the layer is NULL */
> + if (layer == NULL) {
> + if (mode >= AUD2_MODE_DISABLE) {
> + reg &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_MASK;
> + reg |= (mode - AUD2_MODE_DISABLE)
> + << ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_SHIFT;
Please consider using the FIELD_PREP() macro from <linux/bitfield.h>.
Then you can get rid of your *_SHIFT macros.
> + } else {
> + reg &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
> + reg |= mode << ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_SHIFT;
> + }
> + } else if (is_layer_vid(layer)) {
> + reg &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
> + reg |= mode << ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_SHIFT;
> + } else {
> + reg &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
> + reg |= mode << ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_SHIFT;
> + }
Empty line here (spacing after block)
> + zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, reg);
> }
>
> /**
> - * zynqmp_disp_avbuf_disable_audio - Disable audio
> + * zynqmp_disp_avbuf_enable_audio - Enable audio
> * @avbuf: Audio/video buffer manager
> *
> - * Disable all audio buffers.
> + * Enable all audio buffers.
> */
> -static void zynqmp_disp_avbuf_disable_audio(struct zynqmp_disp_avbuf
> *avbuf)
> +static void zynqmp_disp_avbuf_enable_audio(struct zynqmp_disp_avbuf
> *avbuf)
> {
> - u32 val;
> -
> - val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE;
Same as above with FIELD_PREP().
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
> - zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
> + zynqmp_disp_avbuf_output_select(avbuf, NULL, AUD1_MODE_MEM);
> + zynqmp_disp_avbuf_output_select(avbuf, NULL, AUD2_MODE_ENABLE);
> }
>
> /**
> - * zynqmp_disp_avbuf_enable_video - Enable a video layer
> + * zynqmp_disp_avbuf_disable_audio - Disable audio
> * @avbuf: Audio/video buffer manager
> - * @layer: The layer
> - * @mode: Operating mode of layer
> *
> - * Enable the video/graphics buffer for @layer.
> + * Disable all audio buffers.
> */
> -static void zynqmp_disp_avbuf_enable_video(struct zynqmp_disp_avbuf
> *avbuf,
> - struct zynqmp_disp_layer *layer,
> - enum zynqmp_disp_layer_mode mode)
> +static void zynqmp_disp_avbuf_disable_audio(struct zynqmp_disp_avbuf
> *avbuf)
> {
> - u32 val;
> -
> - val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
> - if (is_layer_vid(layer)) {
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
> - if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM;
> - else
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE;
> - } else {
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
> - if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
> - else
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE;
> - }
> - zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
> + zynqmp_disp_avbuf_output_select(avbuf, NULL, AUD1_MODE_DISABLE);
> + zynqmp_disp_avbuf_output_select(avbuf, NULL, AUD2_MODE_DISABLE);
> }
>
> /**
> - * zynqmp_disp_avbuf_disable_video - Disable a video layer
> - * @avbuf: Audio/video buffer manager
> + * zynqmp_disp_avbuf_set_layer_output -Set layer output
You're missing a space after the dash character.
> * @layer: The layer
> + * @mode: The layer mode
> *
> - * Disable the video/graphics buffer for @layer.
> + * Set output for @layer
> */
> -static void zynqmp_disp_avbuf_disable_video(struct zynqmp_disp_avbuf
> *avbuf,
> - struct zynqmp_disp_layer *layer)
> +static void zynqmp_disp_avbuf_set_layer_output(struct
> zynqmp_disp_layer *layer,
> + enum zynqmp_disp_layer_mode mode)
> {
> - u32 val;
> -
> - val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
> - if (is_layer_vid(layer)) {
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE;
> - } else {
> - val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
> - val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE;
> + int val;
> + struct zynqmp_disp *disp = layer->disp;
I'd swap these two lines above - variables are usually defined in
"reverse christmas tree" order, the longest line first, the smallest
line last. No big deal though.
> +
> + switch (mode) {
> + case ZYNQMP_DISP_LAYER_LIVE:
> + val = is_layer_vid(layer) ? VID_MODE_LIVE : GFX_MODE_LIVE;
> + break;
> + case ZYNQMP_DISP_LAYER_MEM:
> + val = is_layer_vid(layer) ? VID_MODE_MEM : GFX_MODE_MEM;
> + break;
> + case ZYNQMP_DISP_LAYER_TPG:
> + if (!is_layer_vid(layer)) {
> + dev_err(disp->dev, "gfx layer has no tpg mode\n");
> + return;
> + }
> + val = VID_MODE_TPG;
> + break;
> + case ZYNQMP_DISP_LAYER_DISABLE:
> + val = is_layer_vid(layer) ? VID_MODE_NONE : GFX_MODE_DISABLE;
> + break;
> + default:
> + dev_err(disp->dev, "invalid layer mode\n");
> + return;
> }
> - zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
While you're at it, you can add an empty line here (spacing after block)
> + zynqmp_disp_avbuf_output_select(&disp->avbuf, layer, val);
> }
>
> /**
> @@ -1030,11 +1063,10 @@ zynqmp_disp_layer_find_format(struct
> zynqmp_disp_layer *layer,
> */
> static void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer)
> {
> - zynqmp_disp_avbuf_enable_video(&layer->disp->avbuf, layer,
> - ZYNQMP_DISP_LAYER_NONLIVE);
> + zynqmp_disp_avbuf_set_layer_output(layer, ZYNQMP_DISP_LAYER_MEM);
> zynqmp_disp_blend_layer_enable(&layer->disp->blend, layer);
>
> - layer->mode = ZYNQMP_DISP_LAYER_NONLIVE;
> + layer->mode = ZYNQMP_DISP_LAYER_MEM;
> }
>
> /**
> @@ -1051,7 +1083,7 @@ static void zynqmp_disp_layer_disable(struct
> zynqmp_disp_layer *layer)
> for (i = 0; i < layer->drm_fmt->num_planes; i++)
> dmaengine_terminate_sync(layer->dmas[i].chan);
>
> - zynqmp_disp_avbuf_disable_video(&layer->disp->avbuf, layer);
> + zynqmp_disp_avbuf_set_layer_output(layer,
> ZYNQMP_DISP_LAYER_DISABLE);
> zynqmp_disp_blend_layer_disable(&layer->disp->blend, layer);
> }
>
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
> b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
> index f92a006d5070..dad3e356d9ab 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
> @@ -120,23 +120,12 @@
> #define ZYNQMP_DISP_AV_BUF_OUTPUT 0x70
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_SHIFT 0
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK (0x3 << 0)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE (0 << 0)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM (1 << 0)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_PATTERN (2 << 0)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE (3 << 0)
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_SHIFT 2
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK (0x3 << 2)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE (0 << 2)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM (1 << 2)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE (2 << 2)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_NONE (3 << 2)
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_SHIFT 4
> #define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK (0x3 << 4)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_PL (0 << 4)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM (1 << 4)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_PATTERN (2 << 4)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE (3 << 4)
> -#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN BIT(6)
> +#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_MASK (0x1 << 6)
> +#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_SHIFT 6
Please use BIT() or GENMASK(). You don't need the _SHIFT macros if you
use FIELD_PREP() / FIELD_GET().
Cheers,
-Paul
> #define ZYNQMP_DISP_AV_BUF_HCOUNT_VCOUNT_INT0 0x74
> #define ZYNQMP_DISP_AV_BUF_HCOUNT_VCOUNT_INT1 0x78
> #define ZYNQMP_DISP_AV_BUF_PATTERN_GEN_SELECT 0x100
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