Re: [PATCH 10/10] drm/exynos/decon5433: add support for DECON-TV

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Hi Andrzej,


2015년 10월 20일 18:22에 Andrzej Hajda 이(가) 쓴 글:

DECON-TV IP is responsible for generating video stream which is transferred
to HDMI IP. It is almost fully compatible with DECON IP.

The patch is based on initial work of Hyungwon Hwang.

Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
---
  drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 154 ++++++++++++++++----------
  include/video/exynos5433_decon.h              |  29 +++++
  2 files changed, 122 insertions(+), 61 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
index 3c9aa4e..fbe1b31 100644
--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
@@ -13,6 +13,7 @@
  #include <linux/platform_device.h>
  #include <linux/clk.h>
  #include <linux/component.h>
+#include <linux/of_device.h>
  #include <linux/of_gpio.h>
  #include <linux/pm_runtime.h>

@@ -37,6 +38,12 @@ static const char * const decon_clks_name[] = {
  	"sclk_decon_eclk",
  };

+enum decon_iftype {
+	IFTYPE_RGB,
+	IFTYPE_I80,
+	IFTYPE_HDMI
+};
+
  enum decon_flag_bits {
  	BIT_CLKS_ENABLED,
  	BIT_IRQS_ENABLED,
@@ -53,7 +60,8 @@ struct decon_context {
  	struct clk			*clks[ARRAY_SIZE(decon_clks_name)];
  	int				pipe;
  	unsigned long			flags;
-	bool				i80_if;
+	enum decon_iftype		out_type;
+	int				first_win;
  };

  static const uint32_t decon_formats[] = {
@@ -80,7 +88,7 @@ static int decon_enable_vblank(struct exynos_drm_crtc *crtc)

  	if (test_and_set_bit(BIT_IRQS_ENABLED, &ctx->flags)) {
  		val = VIDINTCON0_INTEN;
-		if (ctx->i80_if)
+		if (ctx->out_type == IFTYPE_I80)
  			val |= VIDINTCON0_FRAMEDONE;
  		else
  			val |= VIDINTCON0_INTFRMEN;
@@ -104,8 +112,11 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc)

  static void decon_setup_trigger(struct decon_context *ctx)
  {
-	u32 val = TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
-			TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN;
+	u32 val = (ctx->out_type != IFTYPE_HDMI)
+		? TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
+		  TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
+		: TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
+		  TRIGCON_HWTRIGMASK_I80_RGB | TRIGCON_HWTRIGEN_I80_RGB;
  	writel(val, ctx->addr + DECON_TRIGCON);
  }

@@ -118,13 +129,22 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
  	if (test_bit(BIT_SUSPENDED, &ctx->flags))
  		return;

+	if (ctx->out_type == IFTYPE_HDMI) {
+		m->crtc_hsync_start = m->crtc_hdisplay + 10;
+		m->crtc_hsync_end = m->crtc_htotal - 92;
+		m->crtc_vsync_start = m->crtc_vdisplay + 1;
+		m->crtc_vsync_end = m->crtc_vsync_start + 1;
+	}
+
+	decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID, 0);
+
  	/* enable clock gate */
  	val = CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F;
  	writel(val, ctx->addr + DECON_CMU);

  	/* lcd on and use command if */
  	val = VIDOUT_LCD_ON;
-	if (ctx->i80_if)
+	if (ctx->out_type == IFTYPE_I80)
  		val |= VIDOUT_COMMAND_IF;
  	else
  		val |= VIDOUT_RGB_IF;
@@ -134,7 +154,7 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
  		VIDTCON2_HOZVAL(m->hdisplay - 1);
  	writel(val, ctx->addr + DECON_VIDTCON2);

-	if (!ctx->i80_if) {
+	if (ctx->out_type != IFTYPE_I80) {
  		val = VIDTCON00_VBPD_F(
  				m->crtc_vtotal - m->crtc_vsync_end - 1) |
  			VIDTCON00_VFPD_F(
@@ -159,15 +179,9 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
  	decon_setup_trigger(ctx);

  	/* enable output and display signal */
-	val = VIDCON0_ENVID | VIDCON0_ENVID_F;
-	writel(val, ctx->addr + DECON_VIDCON0);
+	decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
  }

-#define COORDINATE_X(x)		(((x) & 0xfff) << 12)
-#define COORDINATE_Y(x)		((x) & 0xfff)
-#define OFFSIZE(x)		(((x) & 0x3fff) << 14)
-#define PAGEWIDTH(x)		((x) & 0x3fff)
-
  static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
  				 struct drm_framebuffer *fb)
  {
@@ -238,6 +252,10 @@ static void decon_atomic_begin(struct exynos_drm_crtc *crtc,
  	decon_shadow_protect_win(ctx, plane->zpos, true);
  }

+#define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
+#define COORDINATE_X(x) BIT_VAL((x), 23, 12)
+#define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
+
  static void decon_update_plane(struct exynos_drm_crtc *crtc,
  			       struct exynos_drm_plane *plane)
  {
@@ -271,8 +289,12 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
  	val = plane->dma_addr[0] + pitch * plane->crtc_h;
  	writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));

-	val = OFFSIZE(pitch - plane->crtc_w * bpp)
-		| PAGEWIDTH(plane->crtc_w * bpp);
+	if (ctx->out_type != IFTYPE_HDMI)
+		val = BIT_VAL(pitch - plane->crtc_w * bpp, 27, 14)
+			| BIT_VAL(plane->crtc_w * bpp, 13, 0);
+	else
+		val = BIT_VAL(pitch - plane->crtc_w * bpp, 29, 15)
+			| BIT_VAL(plane->crtc_w * bpp, 14, 0);
  	writel(val, ctx->addr + DECON_VIDW0xADD2(win));

  	decon_win_set_pixfmt(ctx, win, state->fb);
@@ -314,7 +336,7 @@ static void decon_atomic_flush(struct exynos_drm_crtc *crtc,

  	decon_shadow_protect_win(ctx, plane->zpos, false);

-	if (ctx->i80_if)
+	if (ctx->out_type == IFTYPE_I80)
  		set_bit(BIT_WIN_UPDATED, &ctx->flags);
  }

@@ -339,6 +361,17 @@ static void decon_swreset(struct decon_context *ctx)
  	}

  	WARN(tries == 0, "failed to software reset DECON\n");
+
+	if (ctx->out_type != IFTYPE_HDMI)
+		return;
+
+	writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
+	decon_set_bits(ctx, DECON_CMU,
+		       CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
+	writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
+	writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
+	       ctx->addr + DECON_CRCCTRL);
+	decon_setup_trigger(ctx);
  }

  static void decon_enable(struct exynos_drm_crtc *crtc)
@@ -387,7 +420,7 @@ static void decon_disable(struct exynos_drm_crtc *crtc)
  	 * suspend that connector. Otherwise we might try to scan from
  	 * a destroyed buffer later.
  	 */
-	for (i = 0; i < WINDOWS_NR; i++)
+	for (i = ctx->first_win; i < WINDOWS_NR; i++)
  		decon_disable_plane(crtc, &ctx->planes[i]);

  	decon_swreset(ctx);
@@ -461,25 +494,30 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
  	struct drm_device *drm_dev = data;
  	struct exynos_drm_private *priv = drm_dev->dev_private;
  	struct exynos_drm_plane *exynos_plane;
+	enum exynos_drm_output_type out_type;
  	enum drm_plane_type type;
-	unsigned int zpos;
+	unsigned int win;
  	int ret;

  	ctx->drm_dev = drm_dev;
  	ctx->pipe = priv->pipe++;

-	for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
-		type = exynos_plane_get_type(zpos, CURSOR_WIN);
-		ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
+	for (win = ctx->first_win; win < WINDOWS_NR; win++) {
+		int tmp = (win == ctx->first_win) ? 0 : win;
AFAIK, DECON TV for Exynos5433 SoC has four hardware overlays so I guess you used ctx->first_win to initialize four planes in case of IFTYPE_HDMI.
However, with IFTYPE_HDMI ctx->first_win has 1, as a result, ctx->planes[] will have 0, 2nd, 3rd and 4th planes and this means we should use 0, 2nd ~ 4th hardware overlay excepting 1st overlay. Is this your intention? Shouldn't ctx->planes[] have 1st, 2nd ,3rd and 4th planes so that we can use 1st ~ 4th hardware overlay for DECON TV? 

DECON TV for Exynos5433 SoC can use only 1st ~ 4th hardware overlays.
And other thing, it may be trivial but I think it'd be better to use 'ovl' instead of 'tmp. 

Thanks,
Inki Dae
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