drm: kirin: Remove out_format from ade_crtc

As part of refactoring the kirin driver to better support
different hardware revisions, this patch removes the out_format
field in the struct ade_crtc, which was only ever set to
LDI_OUT_RGB_888.

Thus this patch removes the field and instead directly uses
LDI_OUT_RGB_888.

Cc: Rongrong Zou <zourongrong@gmail.com>
Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Xinliang Liu <z.liuxinliang@hisilicon.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Xu YiPing <xuyiping@hisilicon.com>
[jstultz: reworded commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190820230626.23253-6-john.stultz@linaro.org

drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c

@@ -60,7 +60,6 @@ struct ade_crtc {
 	struct ade_hw_ctx *ctx;
 	struct work_struct display_reset_wq;
 	bool enable;
-	u32 out_format;
 };
 
 struct ade_plane {
@@ -383,11 +382,10 @@ static irqreturn_t ade_irq_handler(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static void ade_display_enable(struct ade_crtc *acrtc)
+static void ade_display_enable(struct ade_hw_ctx *ctx)
 {
-	struct ade_hw_ctx *ctx = acrtc->ctx;
 	void __iomem *base = ctx->base;
-	u32 out_fmt = acrtc->out_format;
+	u32 out_fmt = LDI_OUT_RGB_888;
 
 	/* enable output overlay compositor */
 	writel(ADE_ENABLE, base + ADE_OVLYX_CTL(OUT_OVLY));
@@ -514,7 +512,7 @@ static void ade_crtc_atomic_enable(struct drm_crtc *crtc,
 	}
 
 	ade_set_medianoc_qos(ctx);
-	ade_display_enable(acrtc);
+	ade_display_enable(ctx);
 	ade_dump_regs(ctx->base);
 	drm_crtc_vblank_on(crtc);
 	acrtc->enable = true;
@@ -1024,7 +1022,6 @@ static int ade_drm_init(struct platform_device *pdev)
 	ctx = &ade->ctx;
 	acrtc = &ade->acrtc;
 	acrtc->ctx = ctx;
-	acrtc->out_format = LDI_OUT_RGB_888;
 
 	ret = ade_dts_parse(pdev, ctx);
 	if (ret)