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authorDave Airlie <airlied@redhat.com>2016-05-10 15:01:47 +1000
committerDave Airlie <airlied@redhat.com>2016-05-10 15:01:47 +1000
commit2e726dc4b4e2dd3ae3fe675f9d3af88a2d593ee1 (patch)
treebb22392b580c3c58e9973c4a50133d580f861f98 /drivers/clk
parentbafb86f5bc3173479002555dea7f31d943b12332 (diff)
parentac4b1280319c3032787ac95bfeff14a425c417bf (diff)
Merge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux into drm-next
MT8173 DRM support - device tree binding documentation for all MT8173 display subsystem components - basic mediatek-drm driver for MT8173 with two optional, currently fixed output paths: - DSI encoder support for DSI and (via bridge) eDP panels - DPI encoder support for output to HDMI bridge - necessary clock tree changes for the DPI->HDMI path - export mtk-smi functions used by mediatek-drm * tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux: clk: mediatek: remove hdmitx_dig_cts from TOP clocks clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output clk: mediatek: make dpi0_sel propagate rate changes drm/mediatek: Add DPI sub driver drm/mediatek: Add DSI sub driver drm/mediatek: Add DRM Driver for Mediatek SoC MT8173. dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding memory: mtk-smi: export mtk_smi_larb_get/put
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/mediatek/clk-mt8173.c12
-rw-r--r--drivers/clk/mediatek/clk-mtk.h15
2 files changed, 23 insertions, 4 deletions
diff --git a/drivers/clk/mediatek/clk-mt8173.c b/drivers/clk/mediatek/clk-mt8173.c
index 227e356403d9..10c986018a08 100644
--- a/drivers/clk/mediatek/clk-mt8173.c
+++ b/drivers/clk/mediatek/clk-mt8173.c
@@ -61,7 +61,6 @@ static const struct mtk_fixed_factor top_divs[] __initconst = {
FACTOR(CLK_TOP_CLKRTC_INT, "clkrtc_int", "clk26m", 1, 793),
FACTOR(CLK_TOP_FPC, "fpc_ck", "clk26m", 1, 1),
- FACTOR(CLK_TOP_HDMITX_DIG_CTS, "hdmitx_dig_cts", "tvdpll_445p5m", 1, 3),
FACTOR(CLK_TOP_HDMITXPLL_D2, "hdmitxpll_d2", "hdmitx_dig_cts", 1, 2),
FACTOR(CLK_TOP_HDMITXPLL_D3, "hdmitxpll_d3", "hdmitx_dig_cts", 1, 3),
@@ -558,7 +557,11 @@ static const struct mtk_composite top_muxes[] __initconst = {
MUX_GATE(CLK_TOP_ATB_SEL, "atb_sel", atb_parents, 0x0090, 16, 2, 23),
MUX_GATE(CLK_TOP_VENC_LT_SEL, "venclt_sel", venc_lt_parents, 0x0090, 24, 4, 31),
/* CLK_CFG_6 */
- MUX_GATE(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7),
+ /*
+ * The dpi0_sel clock should not propagate rate changes to its parent
+ * clock so the dpi driver can have full control over PLL and divider.
+ */
+ MUX_GATE_FLAGS(CLK_TOP_DPI0_SEL, "dpi0_sel", dpi0_parents, 0x00a0, 0, 3, 7, 0),
MUX_GATE(CLK_TOP_IRDA_SEL, "irda_sel", irda_parents, 0x00a0, 8, 2, 15),
MUX_GATE(CLK_TOP_CCI400_SEL, "cci400_sel", cci400_parents, 0x00a0, 16, 3, 23),
MUX_GATE(CLK_TOP_AUD_1_SEL, "aud_1_sel", aud_1_parents, 0x00a0, 24, 2, 31),
@@ -1091,6 +1094,11 @@ static void __init mtk_apmixedsys_init(struct device_node *node)
clk_data->clks[cku->id] = clk;
}
+ clk = clk_register_divider(NULL, "hdmi_ref", "tvdpll_594m", 0,
+ base + 0x40, 16, 3, CLK_DIVIDER_POWER_OF_TWO,
+ NULL);
+ clk_data->clks[CLK_APMIXED_HDMI_REF] = clk;
+
r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
if (r)
pr_err("%s(): could not register clock provider: %d\n",
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 32d2e455eb3f..9f24fcfa304f 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -83,7 +83,11 @@ struct mtk_composite {
signed char num_parents;
};
-#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) { \
+/*
+ * In case the rate change propagation to parent clocks is undesirable,
+ * this macro allows to specify the clock flags manually.
+ */
+#define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, _flags) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
@@ -94,9 +98,16 @@ struct mtk_composite {
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
- .flags = CLK_SET_RATE_PARENT, \
+ .flags = _flags, \
}
+/*
+ * Unless necessary, all MUX_GATE clocks propagate rate changes to their
+ * parent clock by default.
+ */
+#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) \
+ MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, CLK_SET_RATE_PARENT)
+
#define MUX(_id, _name, _parents, _reg, _shift, _width) { \
.id = _id, \
.name = _name, \