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@xxxxxxxxxxx>
> ---
> 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?
>
> /* 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;
>
>
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