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Message-ID: <9ea60fe6-79de-b823-2e08-5f298e9c7d50@windriver.com>
Date: Tue, 18 May 2021 13:22:54 +0800
From: "quanyang.wang" <quanyang.wang@...driver.com>
To: Paul Cercueil <paul@...pouillou.net>
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 Paul,
Thank you for your review.
I will update all of this in V2.
Thanks,
Quanyang
On 5/18/21 1:09 AM, Paul Cercueil wrote:
> 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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