From: Jernej Skrabec <jernej.skrabec@siol.net>
To: mripard@kernel.org, wens@csie.org
Cc: airlied@linux.ie, daniel@ffwll.ch,
dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] drm/sun4i: hdmi ddc clk: Fix size of m divider
Date: Mon, 13 Apr 2020 11:54:57 +0200 [thread overview]
Message-ID: <20200413095457.1176754-1-jernej.skrabec@siol.net> (raw)
m divider in DDC clock register is 4 bits wide. Fix that.
Fixes: 9c5681011a0c ("drm/sun4i: Add HDMI support")
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 2 +-
drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 7ad3f06c127e..00ca35f07ba5 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -148,7 +148,7 @@
#define SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE 3
#define SUN4I_HDMI_DDC_CLK_REG 0x528
-#define SUN4I_HDMI_DDC_CLK_M(m) (((m) & 0x7) << 3)
+#define SUN4I_HDMI_DDC_CLK_M(m) (((m) & 0xf) << 3)
#define SUN4I_HDMI_DDC_CLK_N(n) ((n) & 0x7)
#define SUN4I_HDMI_DDC_LINE_CTRL_REG 0x540
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
index 2ff780114106..12430b9d4e93 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
@@ -33,7 +33,7 @@ static unsigned long sun4i_ddc_calc_divider(unsigned long rate,
unsigned long best_rate = 0;
u8 best_m = 0, best_n = 0, _m, _n;
- for (_m = 0; _m < 8; _m++) {
+ for (_m = 0; _m < 16; _m++) {
for (_n = 0; _n < 8; _n++) {
unsigned long tmp_rate;
--
2.26.0
next reply other threads:[~2020-04-13 9:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-13 9:54 Jernej Skrabec [this message]
2020-04-13 10:11 ` [PATCH] drm/sun4i: hdmi ddc clk: Fix size of m divider Chen-Yu Tsai
2020-04-13 14:12 ` Chen-Yu Tsai
2020-04-13 16:09 ` Jernej Škrabec
2020-04-15 10:42 ` Maxime Ripard
2020-04-15 17:52 ` Jernej Škrabec
2020-04-22 9:23 ` Maxime Ripard
2020-06-04 5:19 ` Chen-Yu Tsai
2020-06-10 7:12 ` Maxime Ripard
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