[PATCH] drm/exynos/decon5433: configure sysreg in case of hardware trigger

[Andrzej Hajda]

On 05.01.2017 11:19, Inki Dae wrote:
>
> 2017년 01월 05일 19:15에 Andrzej Hajda 이(가) 쓴 글:
>> On 05.01.2017 11:05, Inki Dae wrote:
>>> 2017년 01월 02일 17:39에 Andrzej Hajda 이(가) 쓴 글:
>>>> In case of HW trigger mode, sysreg register should be configured to
>>>> enable TE functionality. The patch refactors also trigger setup function.
>>>>
>>>> Signed-off-by: Andrzej Hajda <a.hajda at samsung.com>
>>>> ---
>>>> v2: fixed bitop operator (thanks Ilia)
>>>> ---
>>>>  drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 40 +++++++++++++++++++++------
>>>>  1 file changed, 32 insertions(+), 8 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>>>> index 6ca1f31..b63b8e6 100644
>>>> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>>>> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>>>> @@ -13,9 +13,11 @@
>>>>  #include <linux/platform_device.h>
>>>>  #include <linux/clk.h>
>>>>  #include <linux/component.h>
>>>> +#include <linux/mfd/syscon.h>
>>>>  #include <linux/of_device.h>
>>>>  #include <linux/of_gpio.h>
>>>>  #include <linux/pm_runtime.h>
>>>> +#include <linux/regmap.h>
>>>>  
>>>>  #include <video/exynos5433_decon.h>
>>>>  
>>>> @@ -25,6 +27,9 @@
>>>>  #include "exynos_drm_plane.h"
>>>>  #include "exynos_drm_iommu.h"
>>>>  
>>>> +#define DSD_CFG_MUX 0x1004
>>>> +#define DSD_CFG_MUX_TE_UNMASK_GLOBAL BIT(13)
>>>> +
>>>>  #define WINDOWS_NR	3
>>>>  #define MIN_FB_WIDTH_FOR_16WORD_BURST	128
>>>>  
>>>> @@ -56,6 +61,7 @@ struct decon_context {
>>>>  	struct exynos_drm_plane		planes[WINDOWS_NR];
>>>>  	struct exynos_drm_plane_config	configs[WINDOWS_NR];
>>>>  	void __iomem			*addr;
>>>> +	struct regmap			*sysreg;
>>>>  	struct clk			*clks[ARRAY_SIZE(decon_clks_name)];
>>>>  	int				pipe;
>>>>  	unsigned long			flags;
>>>> @@ -117,12 +123,22 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
>>>>  
>>>>  static void decon_setup_trigger(struct decon_context *ctx)
>>>>  {
>>>> -	u32 val = !(ctx->out_type & I80_HW_TRG)
>>>> -		? TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
>>>> -		  TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
>>>> -		: TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
>>>> -		  TRIGCON_HWTRIGMASK | TRIGCON_HWTRIGEN;
>>>> -	writel(val, ctx->addr + DECON_TRIGCON);
>>>> +	if (!(ctx->out_type & (IFTYPE_I80 | I80_HW_TRG)))
>>>> +		return;
>>>> +
>>>> +	if (!(ctx->out_type & I80_HW_TRG)) {
>>>> +		writel(TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
>>>> +		       | TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN,
>>>> +		       ctx->addr + DECON_TRIGCON);
>>>> +		return;
>>>> +	}
>>>> +
>>>> +	writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F | TRIGCON_HWTRIGMASK
>>>> +	       | TRIGCON_HWTRIGEN, ctx->addr + DECON_TRIGCON);
>>>> +
>>>> +	if (regmap_update_bits(ctx->sysreg, DSD_CFG_MUX,
>>>> +			       DSD_CFG_MUX_TE_UNMASK_GLOBAL, ~0))
>>>> +		DRM_ERROR("Cannot update sysreg.\n");
>>>>  }
>>>>  
>>>>  static void decon_commit(struct exynos_drm_crtc *crtc)
>>>> @@ -147,8 +163,7 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>>>>  	val = CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F;
>>>>  	writel(val, ctx->addr + DECON_CMU);
>>>>  
>>>> -	if (ctx->out_type & (IFTYPE_I80 | I80_HW_TRG))
>>>> -		decon_setup_trigger(ctx);
>>>> +	decon_setup_trigger(ctx);
>>> Calling this function in video mode is unnecessary. Why did you remove above condition?
>> I have moved the condition to decon_setup_trigger.
> In video mode, it doesn't need to even call decon_setup_trigger function even though this function is just returned.
> This is really trivial but it'd better not to call this function so seems no reason to modify.

The function is inlined anyway so it does not matter from efficiency
point of view. The good point in this change is that it puts trigger
related code into one function making decon_commit little bit less messy.

Regards
Andrzej


>
>> Regards
>> Andrzej
>>
>>>>  
>>>>  	/* lcd on and use command if */
>>>>  	val = VIDOUT_LCD_ON;
>>>> @@ -640,6 +655,15 @@ static int exynos5433_decon_probe(struct platform_device *pdev)
>>>>  		ctx->out_type |= IFTYPE_I80;
>>>>  	}
>>>>  
>>>> +	if (ctx->out_type & I80_HW_TRG) {
>>>> +		ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
>>>> +							"samsung,disp-sysreg");
>>>> +		if (IS_ERR(ctx->sysreg)) {
>>>> +			dev_err(dev, "failed to get system register\n");
>>>> +			return PTR_ERR(ctx->sysreg);
>>>> +		}
>>>> +	}
>>>> +
>>>>  	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
>>>>  		struct clk *clk;
>>>>  
>>>>
>>
>>
>