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-rw-r--r--target/linux/ipq806x/patches/0105-clk-qcom-Support-display-RCG-clocks.patch378
1 files changed, 378 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0105-clk-qcom-Support-display-RCG-clocks.patch b/target/linux/ipq806x/patches/0105-clk-qcom-Support-display-RCG-clocks.patch
new file mode 100644
index 0000000000..b95562956c
--- /dev/null
+++ b/target/linux/ipq806x/patches/0105-clk-qcom-Support-display-RCG-clocks.patch
@@ -0,0 +1,378 @@
+From 3123079878e29eb8c541111e30de4d1bb42ac6f9 Mon Sep 17 00:00:00 2001
+From: Stephen Boyd <sboyd@codeaurora.org>
+Date: Fri, 16 May 2014 16:07:11 -0700
+Subject: [PATCH 105/182] clk: qcom: Support display RCG clocks
+
+Add support for the DSI/EDP/HDMI RCG clocks. With the proper
+display driver in place this should allow us to support display
+clocks on msm8974 based devices.
+
+Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
+Signed-off-by: Mike Turquette <mturquette@linaro.org>
+---
+ drivers/clk/qcom/clk-rcg.h | 3 +
+ drivers/clk/qcom/clk-rcg2.c | 299 ++++++++++++++++++++++++++++++++++++++++---
+ 2 files changed, 287 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
+index 1d6b6de..b9ec11d 100644
+--- a/drivers/clk/qcom/clk-rcg.h
++++ b/drivers/clk/qcom/clk-rcg.h
+@@ -155,5 +155,8 @@ struct clk_rcg2 {
+ #define to_clk_rcg2(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg2, clkr)
+
+ extern const struct clk_ops clk_rcg2_ops;
++extern const struct clk_ops clk_edp_pixel_ops;
++extern const struct clk_ops clk_byte_ops;
++extern const struct clk_ops clk_pixel_ops;
+
+ #endif
+diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
+index cbecaec..cd185d5 100644
+--- a/drivers/clk/qcom/clk-rcg2.c
++++ b/drivers/clk/qcom/clk-rcg2.c
+@@ -19,6 +19,7 @@
+ #include <linux/clk-provider.h>
+ #include <linux/delay.h>
+ #include <linux/regmap.h>
++#include <linux/math64.h>
+
+ #include <asm/div64.h>
+
+@@ -225,31 +226,25 @@ static long clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long rate,
+ return _freq_tbl_determine_rate(hw, rcg->freq_tbl, rate, p_rate, p);
+ }
+
+-static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate)
++static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
+ {
+- struct clk_rcg2 *rcg = to_clk_rcg2(hw);
+- const struct freq_tbl *f;
+ u32 cfg, mask;
+ int ret;
+
+- f = find_freq(rcg->freq_tbl, rate);
+- if (!f)
+- return -EINVAL;
+-
+ if (rcg->mnd_width && f->n) {
+ mask = BIT(rcg->mnd_width) - 1;
+- ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + M_REG,
+- mask, f->m);
++ ret = regmap_update_bits(rcg->clkr.regmap,
++ rcg->cmd_rcgr + M_REG, mask, f->m);
+ if (ret)
+ return ret;
+
+- ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + N_REG,
+- mask, ~(f->n - f->m));
++ ret = regmap_update_bits(rcg->clkr.regmap,
++ rcg->cmd_rcgr + N_REG, mask, ~(f->n - f->m));
+ if (ret)
+ return ret;
+
+- ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + D_REG,
+- mask, ~f->n);
++ ret = regmap_update_bits(rcg->clkr.regmap,
++ rcg->cmd_rcgr + D_REG, mask, ~f->n);
+ if (ret)
+ return ret;
+ }
+@@ -260,14 +255,26 @@ static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate)
+ cfg |= rcg->parent_map[f->src] << CFG_SRC_SEL_SHIFT;
+ if (rcg->mnd_width && f->n)
+ cfg |= CFG_MODE_DUAL_EDGE;
+- ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, mask,
+- cfg);
++ ret = regmap_update_bits(rcg->clkr.regmap,
++ rcg->cmd_rcgr + CFG_REG, mask, cfg);
+ if (ret)
+ return ret;
+
+ return update_config(rcg);
+ }
+
++static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ const struct freq_tbl *f;
++
++ f = find_freq(rcg->freq_tbl, rate);
++ if (!f)
++ return -EINVAL;
++
++ return clk_rcg2_configure(rcg, f);
++}
++
+ static int clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+ {
+@@ -290,3 +297,265 @@ const struct clk_ops clk_rcg2_ops = {
+ .set_rate_and_parent = clk_rcg2_set_rate_and_parent,
+ };
+ EXPORT_SYMBOL_GPL(clk_rcg2_ops);
++
++struct frac_entry {
++ int num;
++ int den;
++};
++
++static const struct frac_entry frac_table_675m[] = { /* link rate of 270M */
++ { 52, 295 }, /* 119 M */
++ { 11, 57 }, /* 130.25 M */
++ { 63, 307 }, /* 138.50 M */
++ { 11, 50 }, /* 148.50 M */
++ { 47, 206 }, /* 154 M */
++ { 31, 100 }, /* 205.25 M */
++ { 107, 269 }, /* 268.50 M */
++ { },
++};
++
++static struct frac_entry frac_table_810m[] = { /* Link rate of 162M */
++ { 31, 211 }, /* 119 M */
++ { 32, 199 }, /* 130.25 M */
++ { 63, 307 }, /* 138.50 M */
++ { 11, 60 }, /* 148.50 M */
++ { 50, 263 }, /* 154 M */
++ { 31, 120 }, /* 205.25 M */
++ { 119, 359 }, /* 268.50 M */
++ { },
++};
++
++static int clk_edp_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long parent_rate)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ struct freq_tbl f = *rcg->freq_tbl;
++ const struct frac_entry *frac;
++ int delta = 100000;
++ s64 src_rate = parent_rate;
++ s64 request;
++ u32 mask = BIT(rcg->hid_width) - 1;
++ u32 hid_div;
++
++ if (src_rate == 810000000)
++ frac = frac_table_810m;
++ else
++ frac = frac_table_675m;
++
++ for (; frac->num; frac++) {
++ request = rate;
++ request *= frac->den;
++ request = div_s64(request, frac->num);
++ if ((src_rate < (request - delta)) ||
++ (src_rate > (request + delta)))
++ continue;
++
++ regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
++ &hid_div);
++ f.pre_div = hid_div;
++ f.pre_div >>= CFG_SRC_DIV_SHIFT;
++ f.pre_div &= mask;
++ f.m = frac->num;
++ f.n = frac->den;
++
++ return clk_rcg2_configure(rcg, &f);
++ }
++
++ return -EINVAL;
++}
++
++static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
++ unsigned long rate, unsigned long parent_rate, u8 index)
++{
++ /* Parent index is set statically in frequency table */
++ return clk_edp_pixel_set_rate(hw, rate, parent_rate);
++}
++
++static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long *p_rate, struct clk **p)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ const struct freq_tbl *f = rcg->freq_tbl;
++ const struct frac_entry *frac;
++ int delta = 100000;
++ s64 src_rate = *p_rate;
++ s64 request;
++ u32 mask = BIT(rcg->hid_width) - 1;
++ u32 hid_div;
++
++ /* Force the correct parent */
++ *p = clk_get_parent_by_index(hw->clk, f->src);
++
++ if (src_rate == 810000000)
++ frac = frac_table_810m;
++ else
++ frac = frac_table_675m;
++
++ for (; frac->num; frac++) {
++ request = rate;
++ request *= frac->den;
++ request = div_s64(request, frac->num);
++ if ((src_rate < (request - delta)) ||
++ (src_rate > (request + delta)))
++ continue;
++
++ regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
++ &hid_div);
++ hid_div >>= CFG_SRC_DIV_SHIFT;
++ hid_div &= mask;
++
++ return calc_rate(src_rate, frac->num, frac->den, !!frac->den,
++ hid_div);
++ }
++
++ return -EINVAL;
++}
++
++const struct clk_ops clk_edp_pixel_ops = {
++ .is_enabled = clk_rcg2_is_enabled,
++ .get_parent = clk_rcg2_get_parent,
++ .set_parent = clk_rcg2_set_parent,
++ .recalc_rate = clk_rcg2_recalc_rate,
++ .set_rate = clk_edp_pixel_set_rate,
++ .set_rate_and_parent = clk_edp_pixel_set_rate_and_parent,
++ .determine_rate = clk_edp_pixel_determine_rate,
++};
++EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
++
++static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long *p_rate, struct clk **p)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ const struct freq_tbl *f = rcg->freq_tbl;
++ unsigned long parent_rate, div;
++ u32 mask = BIT(rcg->hid_width) - 1;
++
++ if (rate == 0)
++ return -EINVAL;
++
++ *p = clk_get_parent_by_index(hw->clk, f->src);
++ *p_rate = parent_rate = __clk_round_rate(*p, rate);
++
++ div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
++ div = min_t(u32, div, mask);
++
++ return calc_rate(parent_rate, 0, 0, 0, div);
++}
++
++static int clk_byte_set_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long parent_rate)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ struct freq_tbl f = *rcg->freq_tbl;
++ unsigned long div;
++ u32 mask = BIT(rcg->hid_width) - 1;
++
++ div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
++ div = min_t(u32, div, mask);
++
++ f.pre_div = div;
++
++ return clk_rcg2_configure(rcg, &f);
++}
++
++static int clk_byte_set_rate_and_parent(struct clk_hw *hw,
++ unsigned long rate, unsigned long parent_rate, u8 index)
++{
++ /* Parent index is set statically in frequency table */
++ return clk_byte_set_rate(hw, rate, parent_rate);
++}
++
++const struct clk_ops clk_byte_ops = {
++ .is_enabled = clk_rcg2_is_enabled,
++ .get_parent = clk_rcg2_get_parent,
++ .set_parent = clk_rcg2_set_parent,
++ .recalc_rate = clk_rcg2_recalc_rate,
++ .set_rate = clk_byte_set_rate,
++ .set_rate_and_parent = clk_byte_set_rate_and_parent,
++ .determine_rate = clk_byte_determine_rate,
++};
++EXPORT_SYMBOL_GPL(clk_byte_ops);
++
++static const struct frac_entry frac_table_pixel[] = {
++ { 3, 8 },
++ { 2, 9 },
++ { 4, 9 },
++ { 1, 1 },
++ { }
++};
++
++static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long *p_rate, struct clk **p)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ unsigned long request, src_rate;
++ int delta = 100000;
++ const struct freq_tbl *f = rcg->freq_tbl;
++ const struct frac_entry *frac = frac_table_pixel;
++ struct clk *parent = *p = clk_get_parent_by_index(hw->clk, f->src);
++
++ for (; frac->num; frac++) {
++ request = (rate * frac->den) / frac->num;
++
++ src_rate = __clk_round_rate(parent, request);
++ if ((src_rate < (request - delta)) ||
++ (src_rate > (request + delta)))
++ continue;
++
++ *p_rate = src_rate;
++ return (src_rate * frac->num) / frac->den;
++ }
++
++ return -EINVAL;
++}
++
++static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
++ unsigned long parent_rate)
++{
++ struct clk_rcg2 *rcg = to_clk_rcg2(hw);
++ struct freq_tbl f = *rcg->freq_tbl;
++ const struct frac_entry *frac = frac_table_pixel;
++ unsigned long request, src_rate;
++ int delta = 100000;
++ u32 mask = BIT(rcg->hid_width) - 1;
++ u32 hid_div;
++ struct clk *parent = clk_get_parent_by_index(hw->clk, f.src);
++
++ for (; frac->num; frac++) {
++ request = (rate * frac->den) / frac->num;
++
++ src_rate = __clk_round_rate(parent, request);
++ if ((src_rate < (request - delta)) ||
++ (src_rate > (request + delta)))
++ continue;
++
++ regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
++ &hid_div);
++ f.pre_div = hid_div;
++ f.pre_div >>= CFG_SRC_DIV_SHIFT;
++ f.pre_div &= mask;
++ f.m = frac->num;
++ f.n = frac->den;
++
++ return clk_rcg2_configure(rcg, &f);
++ }
++ return -EINVAL;
++}
++
++static int clk_pixel_set_rate_and_parent(struct clk_hw *hw, unsigned long rate,
++ unsigned long parent_rate, u8 index)
++{
++ /* Parent index is set statically in frequency table */
++ return clk_pixel_set_rate(hw, rate, parent_rate);
++}
++
++const struct clk_ops clk_pixel_ops = {
++ .is_enabled = clk_rcg2_is_enabled,
++ .get_parent = clk_rcg2_get_parent,
++ .set_parent = clk_rcg2_set_parent,
++ .recalc_rate = clk_rcg2_recalc_rate,
++ .set_rate = clk_pixel_set_rate,
++ .set_rate_and_parent = clk_pixel_set_rate_and_parent,
++ .determine_rate = clk_pixel_determine_rate,
++};
++EXPORT_SYMBOL_GPL(clk_pixel_ops);
+--
+1.7.10.4
+
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