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authorChen-Yu Tsai <wens@csie.org>2017-10-10 11:20:01 +0800
committerMaxime Ripard <maxime.ripard@free-electrons.com>2017-10-11 09:53:06 +0200
commit4b1c924b1fc15e68251ad0186b5004858d0f147b (patch)
treec138f600d70cd682afcc73fb76bd7fb92a4a4fe7 /drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
parent544c5048bcdc5d5c395d99d61ab7a52964a1420b (diff)
drm/sun4i: hdmi: create a regmap for later use
The HDMI driver is written with readl/writel I/O to the registers. However, to support the A31 variant, which has a different layout for the DDC registers, it was recommended to use regfields to have a cleaner implementation. To use regfields, we need to create an underlying regmap. This patch only adds the regmap. It does not convert the existing driver accesses to use regmap. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171010032008.682-5-wens@csie.org
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c')
-rw-r--r--drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index 3cf1a6932fac..5ab811cda00e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -22,6 +22,7 @@
#include <linux/iopoll.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
#include "sun4i_backend.h"
#include "sun4i_crtc.h"
@@ -267,6 +268,13 @@ static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = {
};
#endif
+static const struct regmap_config sun4i_hdmi_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x580,
+};
+
static int sun4i_hdmi_bind(struct device *dev, struct device *master,
void *data)
{
@@ -321,6 +329,13 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
goto err_disable_mod_clk;
}
+ hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,
+ &sun4i_hdmi_regmap_config);
+ if (IS_ERR(hdmi->regmap)) {
+ dev_err(dev, "Couldn't create HDMI encoder regmap\n");
+ return PTR_ERR(hdmi->regmap);
+ }
+
ret = sun4i_tmds_create(hdmi);
if (ret) {
dev_err(dev, "Couldn't create the TMDS clock\n");