linux-kernel - Re: [PATCH 04/11] drm/meson: Add G12A Support for VIU setup

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Message-ID: <22905ebe-0edb-6cb4-98a2-99cfd6df2b1c@baylibre.com>
Date:   Tue, 9 Apr 2019 11:19:39 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>,
        dri-devel@...ts.freedesktop.org
Cc:     linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/11] drm/meson: Add G12A Support for VIU setup

On 09/04/2019 10:42, Jerome Brunet wrote:
> On Mon, 2019-03-25 at 15:18 +0100, Neil Armstrong wrote:
>> Amlogic G12A SoC needs a different VIU setup code,
>> handle it.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>>  drivers/gpu/drm/meson/meson_viu.c | 72 ++++++++++++++++++++++++++++---
>>  1 file changed, 67 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/meson/meson_viu.c b/drivers/gpu/drm/meson/meson_viu.c
>> index ac0f3687e09a..0169c98b01c9 100644
>> --- a/drivers/gpu/drm/meson/meson_viu.c
>> +++ b/drivers/gpu/drm/meson/meson_viu.c
>> @@ -90,6 +90,34 @@ static int eotf_bypass_coeff[EOTF_COEFF_SIZE] = {
>>  	EOTF_COEFF_RIGHTSHIFT /* right shift */
>>  };
>>  
>> +void meson_viu_set_g12a_osd1_matrix(struct meson_drm *priv, int *m,
>> +				   bool csc_on)
>> +{
>> +	/* VPP WRAP OSD1 matrix */
>> +	writel(((m[0] & 0xfff) << 16) | (m[1] & 0xfff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_PRE_OFFSET0_1));
>> +	writel(m[2] & 0xfff,
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_PRE_OFFSET2));
>> +	writel(((m[3] & 0x1fff) << 16) | (m[4] & 0x1fff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_COEF00_01));
>> +	writel(((m[5] & 0x1fff) << 16) | (m[6] & 0x1fff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_COEF02_10));
>> +	writel(((m[7] & 0x1fff) << 16) | (m[8] & 0x1fff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_COEF11_12));
>> +	writel(((m[9] & 0x1fff) << 16) | (m[10] & 0x1fff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_COEF20_21));
>> +	writel((m[11] & 0x1fff) << 16,
>> +		priv->io_base +	_REG(VPP_WRAP_OSD1_MATRIX_COEF22));
>> +
>> +	writel(((m[18] & 0xfff) << 16) | (m[19] & 0xfff),
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_OFFSET0_1));
> 
> Can you define some of the masks and shifts above ? possibly the same define
> for all the registers I suppose ... maybe using FIELD_PREP ?

Ack

> 
>> +	writel(m[20] & 0xfff,
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_OFFSET2));
>> +
>> +	writel_bits_relaxed(BIT(0), csc_on ? BIT(0) : 0,
>> +		priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_EN_CTRL));
>> +}
>> +
>>  void meson_viu_set_osd_matrix(struct meson_drm *priv,
>>  			      enum viu_matrix_sel_e m_select,
>>  			      int *m, bool csc_on)
>> @@ -336,14 +364,24 @@ void meson_viu_init(struct meson_drm *priv)
>>  	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
>>  	    meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
>>  		meson_viu_load_matrix(priv);
>> +	else if (meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu"))
>> +		meson_viu_set_g12a_osd1_matrix(priv, RGB709_to_YUV709l_coeff,
>> +					       true);
>>  
>>  	/* Initialize OSD1 fifo control register */
>>  	reg = BIT(0) |	/* Urgent DDR request priority */
>> -	      (4 << 5) | /* hold_fifo_lines */
>> -	      (3 << 10) | /* burst length 64 */
>> -	      (32 << 12) | /* fifo_depth_val: 32*8=256 */
>> -	      (2 << 22) | /* 4 words in 1 burst */
>> -	      (2 << 24);
>> +	      (4 << 5); /* hold_fifo_lines */
>> +	if (meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu"))
>> +		reg |= (1 << 10) | /* burst length 32 */
>> +		       (32 << 12) | /* fifo_depth_val: 32*8=256 */
>> +		       (2 << 22) | /* 4 words in 1 burst */
>> +		       (2 << 24) |
>> +		       (1 << 31);
>> +	else
>> +		reg |= (3 << 10) | /* burst length 64 */
>> +		       (32 << 12) | /* fifo_depth_val: 32*8=256 */
>> +		       (2 << 22) | /* 4 words in 1 burst */
>> +		       (2 << 24);
> 
> Could you use the BIT() macro and add some defines ?

Ack

> 
>>  	writel_relaxed(reg, priv->io_base + _REG(VIU_OSD1_FIFO_CTRL_STAT));
>>  	writel_relaxed(reg, priv->io_base + _REG(VIU_OSD2_FIFO_CTRL_STAT));
>>  
>> @@ -369,6 +407,30 @@ void meson_viu_init(struct meson_drm *priv)
>>  	writel_relaxed(0x00FF00C0,
>>  			priv->io_base + _REG(VD2_IF0_LUMA_FIFO_SIZE));
>>  
>> +	if (meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu")) {
>> +		writel_relaxed(4 << 29 |
>> +				1 << 27 |
>> +				1 << 26 | /* blend_din0 input to blend0 */
>> +				1 << 25 | /* blend1_dout to blend2 */
>> +				1 << 24 | /* blend1_din3 input to blend1 */
>> +				1 << 20 |
>> +				0 << 16 |
>> +				1,
>> +				priv->io_base + _REG(VIU_OSD_BLEND_CTRL));
>> +		writel_relaxed(3 << 8 |
>> +				1 << 20,
>> +				priv->io_base + _REG(OSD1_BLEND_SRC_CTRL));
>> +		writel_relaxed(1 << 20,
>> +				priv->io_base + _REG(OSD2_BLEND_SRC_CTRL));
>> +		writel_relaxed(0, priv->io_base + _REG(VD1_BLEND_SRC_CTRL));
>> +		writel_relaxed(0, priv->io_base + _REG(VD2_BLEND_SRC_CTRL));
>> +		writel_relaxed(0,
>> +				priv->io_base + _REG(VIU_OSD_BLEND_DUMMY_DATA0));
>> +		writel_relaxed(0,
>> +				priv->io_base + _REG(VIU_OSD_BLEND_DUMMY_ALPHA));
>> +		writel_bits_relaxed(0x3 << 2, 0x3 << 2,
>> +				priv->io_base + _REG(DOLBY_PATH_CTRL));
> 
> Same for this hunk

Ack

> 
>> +	}
>>  
>>  	priv->viu.osd1_enabled = false;
>>  	priv->viu.osd1_commit = false;
> 
> 

Will fix in a follow-up patch, including GXBB/GXL/GXM.

Neil