Re: [PATCH v2 1/5] drm/rockchip: vop: get rid of register init table

[Mark yao <mark.yao@rock-chips.com>]

On 2017年07月14日 04:29, Sean Paul wrote:
> On Thu, Jul 13, 2017 at 09:33:45AM +0800, Mark yao wrote:
>> On 2017年07月13日 00:47, Sean Paul wrote:
>>> On Wed, Jul 12, 2017 at 10:03:27AM +0800, Mark Yao wrote:
>>>> Register init table use un-document define, it is unreadable,
>>>> And sometimes we only want to update tiny bits, init table
>>>> method is not friendly, it's diffcult to reuse for difference
>>>> chips.
>>> While I'm happy to see the init_table removed, it seems like the new code is not
>>> equivalent to the old (ie: some register writes have been dropped). How did you
>>> ensure that you're not breaking existing boards that depend on the deleted register
>>> initialization?
>>>
>>> Sean
>> All the existing boards works fine on my internal kernel board with the init_table removed,
>> We had tested all the existing boards, so it's no problem to removed init_table
>>
> That begs the question... why was it introduced if it's not necessary?
Hi Sean

Some registers need to be initialized when vop power on, global_config_done, blank, win gate, etc.
Previously init_table was introduced to handle the initialization of these registers.

So, when we remove the init_table mechanism, we need to re-join the initialization of these registers,
this job is already done in this patch.

I think the title "get rid of" caused some doubts, it's not just remove init_table mechanism,
to be exact, direct setting needed register instead of handling with init_table.

I will make it cleaner next version.

Thanks.

>
> Sean
>
>>>> Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
>>>> ---
>>>>    drivers/gpu/drm/rockchip/rockchip_drm_vop.c |  6 ++--
>>>>    drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 10 ++-----
>>>>    drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 43 +++--------------------------
>>>>    3 files changed, 10 insertions(+), 49 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
>>>> index 45589d6..7a5f809 100644
>>>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
>>>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
>>>> @@ -1393,7 +1393,6 @@ static void vop_destroy_crtc(struct vop *vop)
>>>>    static int vop_initial(struct vop *vop)
>>>>    {
>>>>    	const struct vop_data *vop_data = vop->data;
>>>> -	const struct vop_reg_data *init_table = vop_data->init_table;
>>>>    	struct reset_control *ahb_rst;
>>>>    	int i, ret;
>>>> @@ -1453,13 +1452,14 @@ static int vop_initial(struct vop *vop)
>>>>    	memcpy(vop->regsbak, vop->regs, vop->len);
>>>> -	for (i = 0; i < vop_data->table_size; i++)
>>>> -		vop_writel(vop, init_table[i].offset, init_table[i].value);
>>>> +	VOP_CTRL_SET(vop, global_regdone_en, 1);
>>>> +	VOP_CTRL_SET(vop, dsp_blank, 0);
>>>>    	for (i = 0; i < vop_data->win_size; i++) {
>>>>    		const struct vop_win_data *win = &vop_data->win[i];
>>>>    		VOP_WIN_SET(vop, win, enable, 0);
>>>> +		VOP_WIN_SET(vop, win, gate, 1);
>>>>    	}
>>>>    	vop_cfg_done(vop);
>>>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
>>>> index 9979fd0..084d3b2 100644
>>>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
>>>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
>>>> @@ -24,11 +24,6 @@ enum vop_data_format {
>>>>    	VOP_FMT_YUV444SP,
>>>>    };
>>>> -struct vop_reg_data {
>>>> -	uint32_t offset;
>>>> -	uint32_t value;
>>>> -};
>>>> -
>>>>    struct vop_reg {
>>>>    	uint32_t offset;
>>>>    	uint32_t shift;
>>>> @@ -46,6 +41,7 @@ struct vop_ctrl {
>>>>    	struct vop_reg hdmi_en;
>>>>    	struct vop_reg mipi_en;
>>>>    	struct vop_reg dp_en;
>>>> +	struct vop_reg dsp_blank;
>>>>    	struct vop_reg out_mode;
>>>>    	struct vop_reg dither_down;
>>>>    	struct vop_reg dither_up;
>>>> @@ -65,6 +61,7 @@ struct vop_ctrl {
>>>>    	struct vop_reg line_flag_num[2];
>>>> +	struct vop_reg global_regdone_en;
>>>>    	struct vop_reg cfg_done;
>>>>    };
>>>> @@ -115,6 +112,7 @@ struct vop_win_phy {
>>>>    	uint32_t nformats;
>>>>    	struct vop_reg enable;
>>>> +	struct vop_reg gate;
>>>>    	struct vop_reg format;
>>>>    	struct vop_reg rb_swap;
>>>>    	struct vop_reg act_info;
>>>> @@ -136,8 +134,6 @@ struct vop_win_data {
>>>>    };
>>>>    struct vop_data {
>>>> -	const struct vop_reg_data *init_table;
>>>> -	unsigned int table_size;
>>>>    	const struct vop_ctrl *ctrl;
>>>>    	const struct vop_intr *intr;
>>>>    	const struct vop_win_data *win;
>>>> diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>>> index bafd698..00e9d79 100644
>>>> --- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>>> +++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
>>>> @@ -127,13 +127,7 @@
>>>>    	.cfg_done = VOP_REG(RK3036_REG_CFG_DONE, 0x1, 0),
>>>>    };
>>>> -static const struct vop_reg_data rk3036_vop_init_reg_table[] = {
>>>> -	{RK3036_DSP_CTRL1, 0x00000000},
>>>> -};
>>>> -
>>>>    static const struct vop_data rk3036_vop = {
>>>> -	.init_table = rk3036_vop_init_reg_table,
>>>> -	.table_size = ARRAY_SIZE(rk3036_vop_init_reg_table),
>>>>    	.ctrl = &rk3036_ctrl_data,
>>>>    	.intr = &rk3036_intr,
>>>>    	.win = rk3036_vop_win_data,
>>>> @@ -193,7 +187,8 @@
>>>>    static const struct vop_win_phy rk3288_win23_data = {
>>>>    	.data_formats = formats_win_lite,
>>>>    	.nformats = ARRAY_SIZE(formats_win_lite),
>>>> -	.enable = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 0),
>>>> +	.enable = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 4),
>>>> +	.gate = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 0),
>>>>    	.format = VOP_REG(RK3288_WIN2_CTRL0, 0x7, 1),
>>>>    	.rb_swap = VOP_REG(RK3288_WIN2_CTRL0, 0x1, 12),
>>>>    	.dsp_info = VOP_REG(RK3288_WIN2_DSP_INFO0, 0x0fff0fff, 0),
>>>> @@ -215,6 +210,7 @@
>>>>    	.dither_down = VOP_REG(RK3288_DSP_CTRL1, 0xf, 1),
>>>>    	.dither_up = VOP_REG(RK3288_DSP_CTRL1, 0x1, 6),
>>>>    	.data_blank = VOP_REG(RK3288_DSP_CTRL0, 0x1, 19),
>>>> +	.dsp_blank = VOP_REG(RK3288_DSP_CTRL0, 0x3, 18),
>>>>    	.out_mode = VOP_REG(RK3288_DSP_CTRL0, 0xf, 0),
>>>>    	.pin_pol = VOP_REG(RK3288_DSP_CTRL0, 0xf, 4),
>>>>    	.htotal_pw = VOP_REG(RK3288_DSP_HTOTAL_HS_END, 0x1fff1fff, 0),
>>>> @@ -224,22 +220,10 @@
>>>>    	.hpost_st_end = VOP_REG(RK3288_POST_DSP_HACT_INFO, 0x1fff1fff, 0),
>>>>    	.vpost_st_end = VOP_REG(RK3288_POST_DSP_VACT_INFO, 0x1fff1fff, 0),
>>>>    	.line_flag_num[0] = VOP_REG(RK3288_INTR_CTRL0, 0x1fff, 12),
>>>> +	.global_regdone_en = VOP_REG(RK3288_SYS_CTRL, 0x1, 11),
>>>>    	.cfg_done = VOP_REG(RK3288_REG_CFG_DONE, 0x1, 0),
>>>>    };
>>>> -static const struct vop_reg_data rk3288_init_reg_table[] = {
>>>> -	{RK3288_SYS_CTRL, 0x00c00000},
>>>> -	{RK3288_DSP_CTRL0, 0x00000000},
>>>> -	{RK3288_WIN0_CTRL0, 0x00000080},
>>>> -	{RK3288_WIN1_CTRL0, 0x00000080},
>>>> -	/* TODO: Win2/3 support multiple area function, but we haven't found
>>>> -	 * a suitable way to use it yet, so let's just use them as other windows
>>>> -	 * with only area 0 enabled.
>>>> -	 */
>>>> -	{RK3288_WIN2_CTRL0, 0x00000010},
>>>> -	{RK3288_WIN3_CTRL0, 0x00000010},
>>>> -};
>>>> -
>>>>    /*
>>>>     * Note: rk3288 has a dedicated 'cursor' window, however, that window requires
>>>>     * special support to get alpha blending working.  For now, just use overlay
>>>> @@ -273,8 +257,6 @@
>>>>    };
>>>>    static const struct vop_data rk3288_vop = {
>>>> -	.init_table = rk3288_init_reg_table,
>>>> -	.table_size = ARRAY_SIZE(rk3288_init_reg_table),
>>>>    	.feature = VOP_FEATURE_OUTPUT_RGB10,
>>>>    	.intr = &rk3288_vop_intr,
>>>>    	.ctrl = &rk3288_ctrl_data,
>>>> @@ -328,22 +310,7 @@
>>>>    	.clear = VOP_REG_MASK(RK3399_INTR_CLEAR0, 0xffff, 0),
>>>>    };
>>>> -static const struct vop_reg_data rk3399_init_reg_table[] = {
>>>> -	{RK3399_SYS_CTRL, 0x2000f800},
>>>> -	{RK3399_DSP_CTRL0, 0x00000000},
>>>> -	{RK3399_WIN0_CTRL0, 0x00000080},
>>>> -	{RK3399_WIN1_CTRL0, 0x00000080},
>>>> -	/* TODO: Win2/3 support multiple area function, but we haven't found
>>>> -	 * a suitable way to use it yet, so let's just use them as other windows
>>>> -	 * with only area 0 enabled.
>>>> -	 */
>>>> -	{RK3399_WIN2_CTRL0, 0x00000010},
>>>> -	{RK3399_WIN3_CTRL0, 0x00000010},
>>>> -};
>>>> -
>>>>    static const struct vop_data rk3399_vop_big = {
>>>> -	.init_table = rk3399_init_reg_table,
>>>> -	.table_size = ARRAY_SIZE(rk3399_init_reg_table),
>>>>    	.feature = VOP_FEATURE_OUTPUT_RGB10,
>>>>    	.intr = &rk3399_vop_intr,
>>>>    	.ctrl = &rk3399_ctrl_data,
>>>> @@ -362,8 +329,6 @@
>>>>    };
>>>>    static const struct vop_data rk3399_vop_lit = {
>>>> -	.init_table = rk3399_init_reg_table,
>>>> -	.table_size = ARRAY_SIZE(rk3399_init_reg_table),
>>>>    	.intr = &rk3399_vop_intr,
>>>>    	.ctrl = &rk3399_ctrl_data,
>>>>    	/*
>>>> -- 
>>>> 1.9.1
>>>>
>>>>
>>>> _______________________________________________
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>>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>>
>> -- 
>> Ｍark Yao
>>
>>


-- 
Ｍark Yao


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