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From:   "H. Nikolaus Schaller" <hns@goldelico.com>
To:     Paul Cercueil <paul@crapouillou.net>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        "H. Nikolaus Schaller" <hns@goldelico.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Kees Cook <keescook@chromium.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Robert Foss <robert.foss@linaro.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Ezequiel Garcia <ezequiel@collabora.com>,
        Harry Wentland <harry.wentland@amd.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Maxime Ripard <maxime@cerno.tech>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Paul Boddie <paul@boddie.org.uk>
Cc:     devicetree@vger.kernel.org, linux-mips@vger.kernel.org,
        linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org,
        Jonas Karlman <jonas@kwiboo.se>,
        dri-devel@lists.freedesktop.org
Subject: [PATCH v4 10/10] drm/ingenic: add some jz4780 specific features
Date:   Mon, 27 Sep 2021 18:44:28 +0200
Message-Id: <8cbfba68ce45e10106eb322d622cb7ac64c0e4d4.1632761068.git.hns@goldelico.com>
In-Reply-To: <cover.1632761067.git.hns@goldelico.com>
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From: Paul Boddie <paul@boddie.org.uk>

The jz4780 has some features which need initialization
according to the vendor kernel.

Signed-off-by: Paul Boddie <paul@boddie.org.uk>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index e2df4b085905..605549b316b5 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -66,6 +66,10 @@ struct jz_soc_info {
 	bool needs_dev_clk;
 	bool has_osd;
 	bool map_noncoherent;
+	bool has_alpha;
+	bool has_pcfg;
+	bool has_recover;
+	bool has_rgbc;
 	bool use_extended_hwdesc;
 	unsigned int max_width, max_height;
 	const u32 *formats_f0, *formats_f1;
@@ -732,6 +736,9 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
 		    | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;
 	}
 
+	if (priv->soc_info->has_recover)
+		cfg |= JZ_LCD_CFG_RECOVER_FIFO_UNDERRUN;
+
 	/* set use of the 8-word descriptor and OSD foreground usage. */
 	if (priv->soc_info->use_extended_hwdesc)
 		cfg |= JZ_LCD_CFG_DESCRIPTOR_8;
@@ -1321,6 +1328,25 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
 	if (soc_info->has_osd)
 		regmap_set_bits(priv->map, JZ_REG_LCD_OSDC, JZ_LCD_OSDC_OSDEN);
 
+	if (soc_info->has_alpha)
+		regmap_set_bits(priv->map, JZ_REG_LCD_OSDC, JZ_LCD_OSDC_ALPHAEN);
+
+	/* Magic values from the vendor kernel for the priority thresholds. */
+	if (soc_info->has_pcfg)
+		regmap_write(priv->map, JZ_REG_LCD_PCFG,
+			     JZ_LCD_PCFG_PRI_MODE |
+			     JZ_LCD_PCFG_HP_BST_16 |
+			     (511 << JZ_LCD_PCFG_THRESHOLD2_OFFSET) |
+			     (400 << JZ_LCD_PCFG_THRESHOLD1_OFFSET) |
+			     (256 << JZ_LCD_PCFG_THRESHOLD0_OFFSET));
+
+	/* RGB output control may be superfluous. */
+	if (soc_info->has_rgbc)
+		regmap_write(priv->map, JZ_REG_LCD_RGBC,
+			     JZ_LCD_RGBC_RGB_FORMAT_ENABLE |
+			     JZ_LCD_RGBC_ODD_RGB |
+			     JZ_LCD_RGBC_EVEN_RGB);
+
 	mutex_init(&priv->clk_mutex);
 	priv->clock_nb.notifier_call = ingenic_drm_update_pixclk;
 
@@ -1484,6 +1510,9 @@ static const struct jz_soc_info jz4740_soc_info = {
 	.needs_dev_clk = true,
 	.has_osd = false,
 	.map_noncoherent = false,
+	.has_pcfg = false,
+	.has_recover = false,
+	.has_rgbc = false,
 	.max_width = 800,
 	.max_height = 600,
 	.formats_f1 = jz4740_formats,
@@ -1496,6 +1525,9 @@ static const struct jz_soc_info jz4725b_soc_info = {
 	.needs_dev_clk = false,
 	.has_osd = true,
 	.map_noncoherent = false,
+	.has_pcfg = false,
+	.has_recover = false,
+	.has_rgbc = false,
 	.max_width = 800,
 	.max_height = 600,
 	.formats_f1 = jz4725b_formats_f1,
@@ -1509,6 +1541,9 @@ static const struct jz_soc_info jz4770_soc_info = {
 	.needs_dev_clk = false,
 	.has_osd = true,
 	.map_noncoherent = true,
+	.has_pcfg = false,
+	.has_recover = false,
+	.has_rgbc = false,
 	.max_width = 1280,
 	.max_height = 720,
 	.formats_f1 = jz4770_formats_f1,
@@ -1521,6 +1556,10 @@ static const struct jz_soc_info jz4770_soc_info = {
 static const struct jz_soc_info jz4780_soc_info = {
 	.needs_dev_clk = true,
 	.has_osd = true,
+	.has_alpha = true,
+	.has_pcfg = true,
+	.has_recover = true,
+	.has_rgbc = true,
 	.use_extended_hwdesc = true,
 	.max_width = 4096,
 	.max_height = 2048,
-- 
2.31.1