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[2/9] drm/sun4i: tcon: Move SoC specific quirks to a DT matched data structure

Message ID 20161006160629.11198-3-wens@csie.org (mailing list archive)
State New, archived
Headers show

Commit Message

Chen-Yu Tsai Oct. 6, 2016, 4:06 p.m. UTC 
We already have some differences between the 2 supported SoCs.
More will be added as we support other SoCs. To avoid bloating
the probe function with even more conditionals, move the quirks
to a separate data structure that's tied to the compatible string.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 35 ++++++++++++++++++++---------------
 drivers/gpu/drm/sun4i/sun4i_tcon.h | 13 +++++++++----
 2 files changed, 29 insertions(+), 19 deletions(-)

Comments

Maxime Ripard Oct. 7, 2016, 8:38 a.m. UTC | #1 
Hi,

On Fri, Oct 07, 2016 at 12:06:22AM +0800, Chen-Yu Tsai wrote:
> +struct sun4i_tcon_quirks {
> +	bool	is_sun5i;	/* sun5i has undocumented mux */
> +	bool	has_channel_1;	/* a33 does not have channel 1 */
> +	bool	has_bypass_src;	/* has separate input bypassing CEU */
> +	bool	has_dma_src;	/* has DMA input */
> +};
> +

I'd really prefer to keep the has_mux quirk name. is_sun5i doesn't
really relate to what we're doing there, is redundant with the
compatible, and render the other quirks name useless, since we could
just have is_sun.i quirks and deal with that (which is essentially
what we were doing before).

Maxime
Chen-Yu Tsai Oct. 11, 2016, 9:16 a.m. UTC | #2 
On Fri, Oct 7, 2016 at 4:38 PM, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> Hi,
>
> On Fri, Oct 07, 2016 at 12:06:22AM +0800, Chen-Yu Tsai wrote:
>> +struct sun4i_tcon_quirks {
>> +     bool    is_sun5i;       /* sun5i has undocumented mux */
>> +     bool    has_channel_1;  /* a33 does not have channel 1 */
>> +     bool    has_bypass_src; /* has separate input bypassing CEU */
>> +     bool    has_dma_src;    /* has DMA input */
>> +};
>> +
>
> I'd really prefer to keep the has_mux quirk name. is_sun5i doesn't
> really relate to what we're doing there, is redundant with the
> compatible, and render the other quirks name useless, since we could
> just have is_sun.i quirks and deal with that (which is essentially
> what we were doing before).

Lets call it has_unknown_mux then. has_mux would be confusing with
the HDMI and MIPI DSI muxes on sun6i.

ChenYu
Maxime Ripard Oct. 11, 2016, 9:36 a.m. UTC | #3 
On Tue, Oct 11, 2016 at 05:16:21PM +0800, Chen-Yu Tsai wrote:
> On Fri, Oct 7, 2016 at 4:38 PM, Maxime Ripard
> <maxime.ripard@free-electrons.com> wrote:
> > Hi,
> >
> > On Fri, Oct 07, 2016 at 12:06:22AM +0800, Chen-Yu Tsai wrote:
> >> +struct sun4i_tcon_quirks {
> >> +     bool    is_sun5i;       /* sun5i has undocumented mux */
> >> +     bool    has_channel_1;  /* a33 does not have channel 1 */
> >> +     bool    has_bypass_src; /* has separate input bypassing CEU */
> >> +     bool    has_dma_src;    /* has DMA input */
> >> +};
> >> +
> >
> > I'd really prefer to keep the has_mux quirk name. is_sun5i doesn't
> > really relate to what we're doing there, is redundant with the
> > compatible, and render the other quirks name useless, since we could
> > just have is_sun.i quirks and deal with that (which is essentially
> > what we were doing before).
> 
> Lets call it has_unknown_mux then. has_mux would be confusing with
> the HDMI and MIPI DSI muxes on sun6i.

That works for me.

Maxime
diff mbox

Patch

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index cadacb517f95..c6c1c7ce94a1 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -20,6 +20,7 @@ 
 #include <linux/component.h>
 #include <linux/ioport.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/of_irq.h>
 #include <linux/regmap.h>
@@ -62,7 +63,7 @@  void sun4i_tcon_channel_disable(struct sun4i_tcon *tcon, int channel)
 		return;
 	}
 
-	WARN_ON(!tcon->has_channel_1);
+	WARN_ON(!tcon->quirks->has_channel_1);
 	regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
 			   SUN4I_TCON1_CTL_TCON_ENABLE, 0);
 	clk_disable_unprepare(tcon->sclk1);
@@ -80,7 +81,7 @@  void sun4i_tcon_channel_enable(struct sun4i_tcon *tcon, int channel)
 		return;
 	}
 
-	WARN_ON(!tcon->has_channel_1);
+	WARN_ON(!tcon->quirks->has_channel_1);
 	regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
 			   SUN4I_TCON1_CTL_TCON_ENABLE,
 			   SUN4I_TCON1_CTL_TCON_ENABLE);
@@ -202,7 +203,7 @@  void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val;
 
-	WARN_ON(!tcon->has_channel_1);
+	WARN_ON(!tcon->quirks->has_channel_1);
 
 	/* Adjust clock delay */
 	clk_delay = sun4i_tcon_get_clk_delay(mode, 1);
@@ -266,7 +267,7 @@  void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 	/*
 	 * FIXME: Undocumented bits
 	 */
-	if (tcon->has_mux)
+	if (tcon->quirks->is_sun5i)
 		regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, 1);
 }
 EXPORT_SYMBOL(sun4i_tcon1_mode_set);
@@ -327,7 +328,7 @@  static int sun4i_tcon_init_clocks(struct device *dev,
 		return PTR_ERR(tcon->sclk0);
 	}
 
-	if (tcon->has_channel_1) {
+	if (tcon->quirks->has_channel_1) {
 		tcon->sclk1 = devm_clk_get(dev, "tcon-ch1");
 		if (IS_ERR(tcon->sclk1)) {
 			dev_err(dev, "Couldn't get the TCON channel 1 clock\n");
@@ -487,14 +488,7 @@  static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	drv->tcon = tcon;
 	tcon->drm = drm;
 	tcon->dev = dev;
-
-	if (of_device_is_compatible(dev->of_node, "allwinner,sun5i-a13-tcon")) {
-		tcon->has_mux = true;
-		tcon->has_channel_1 = true;
-	} else {
-		tcon->has_mux = false;
-		tcon->has_channel_1 = false;
-	}
+	tcon->quirks = of_device_get_match_data(dev);
 
 	tcon->lcd_rst = devm_reset_control_get(dev, "lcd");
 	if (IS_ERR(tcon->lcd_rst)) {
@@ -588,9 +582,20 @@  static int sun4i_tcon_remove(struct platform_device *pdev)
 	return 0;
 }
 
+const struct sun4i_tcon_quirks sun5i_a13_quirks = {
+	.is_sun5i	= true,
+	.has_channel_1	= true,
+	.has_bypass_src	= true,
+	.has_dma_src	= true,
+};
+
+const struct sun4i_tcon_quirks sun8i_a33_quirks = {
+	/* nothing is supported */
+};
+
 static const struct of_device_id sun4i_tcon_of_table[] = {
-	{ .compatible = "allwinner,sun5i-a13-tcon" },
-	{ .compatible = "allwinner,sun8i-a33-tcon" },
+	{ .compatible = "allwinner,sun5i-a13-tcon", .data = &sun5i_a13_quirks },
+	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sun4i_tcon_of_table);
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index 12bd48925f4d..96c4f15c6922 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -142,6 +142,13 @@ 
 
 #define SUN4I_TCON_MAX_CHANNELS		2
 
+struct sun4i_tcon_quirks {
+	bool	is_sun5i;	/* sun5i has undocumented mux */
+	bool	has_channel_1;	/* a33 does not have channel 1 */
+	bool	has_bypass_src;	/* has separate input bypassing CEU */
+	bool	has_dma_src;	/* has DMA input */
+};
+
 struct sun4i_tcon {
 	struct device			*dev;
 	struct drm_device		*drm;
@@ -160,12 +167,10 @@  struct sun4i_tcon {
 	/* Reset control */
 	struct reset_control		*lcd_rst;
 
-	/* Platform adjustments */
-	bool				has_mux;
-
 	struct drm_panel		*panel;
 
-	bool				has_channel_1;
+	/* Platform adjustments */
+	const struct sun4i_tcon_quirks	*quirks;
 };
 
 struct drm_bridge *sun4i_tcon_find_bridge(struct device_node *node);