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Message-Id: <20240522-fd-hdmi-hpd-v2-2-c30bdb7c5c7e@linaro.org>
Date: Wed, 22 May 2024 13:50:54 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Rob Clark <robdclark@...il.com>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 02/14] drm/msm/hdmi: simplify extp clock handling
With the extp being the only "power" clock left, remove the surrounding
loops and handle the extp clock directly.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
drivers/gpu/drm/msm/hdmi/hdmi.c | 24 ++++--------------------
drivers/gpu/drm/msm/hdmi/hdmi.h | 6 +-----
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 33 +++++++++++++--------------------
3 files changed, 18 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 108c86925780..681265e29aa0 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -235,13 +235,11 @@ static const struct hdmi_platform_config hdmi_tx_8960_config = {
};
static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
-static const char *pwr_clk_names_8x74[] = {"extp"};
static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core", "alt_iface"};
static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0, 0};
static const struct hdmi_platform_config hdmi_tx_8974_config = {
HDMI_CFG(pwr_reg, 8x74),
- HDMI_CFG(pwr_clk, 8x74),
HDMI_CFG(hpd_clk, 8x74),
.hpd_freq = hpd_clk_freq_8x74,
};
@@ -485,24 +483,10 @@ static int msm_hdmi_dev_probe(struct platform_device *pdev)
hdmi->hpd_clks[i] = clk;
}
- hdmi->pwr_clks = devm_kcalloc(&pdev->dev,
- config->pwr_clk_cnt,
- sizeof(hdmi->pwr_clks[0]),
- GFP_KERNEL);
- if (!hdmi->pwr_clks)
- return -ENOMEM;
-
- for (i = 0; i < config->pwr_clk_cnt; i++) {
- struct clk *clk;
-
- clk = msm_clk_get(pdev, config->pwr_clk_names[i]);
- if (IS_ERR(clk))
- return dev_err_probe(dev, PTR_ERR(clk),
- "failed to get pwr clk: %s\n",
- config->pwr_clk_names[i]);
-
- hdmi->pwr_clks[i] = clk;
- }
+ hdmi->extp_clk = devm_clk_get_optional(&pdev->dev, "extp");
+ if (IS_ERR(hdmi->extp_clk))
+ return dev_err_probe(dev, PTR_ERR(hdmi->extp_clk),
+ "failed to get extp clock\n");
hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
/* This will catch e.g. -EPROBE_DEFER */
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 4586baf36415..abdbe4779cf9 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -51,7 +51,7 @@ struct hdmi {
struct regulator_bulk_data *hpd_regs;
struct regulator_bulk_data *pwr_regs;
struct clk **hpd_clks;
- struct clk **pwr_clks;
+ struct clk *extp_clk;
struct gpio_desc *hpd_gpiod;
@@ -98,10 +98,6 @@ struct hdmi_platform_config {
const char **hpd_clk_names;
const long unsigned *hpd_freq;
int hpd_clk_cnt;
-
- /* clks that need to be on for screen pwr (ie pixel clk): */
- const char **pwr_clk_names;
- int pwr_clk_cnt;
};
struct hdmi_bridge {
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 4a5b5112227f..9eb4d06bdc0e 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -17,7 +17,7 @@ static void msm_hdmi_power_on(struct drm_bridge *bridge)
struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
struct hdmi *hdmi = hdmi_bridge->hdmi;
const struct hdmi_platform_config *config = hdmi->config;
- int i, ret;
+ int ret;
pm_runtime_get_sync(&hdmi->pdev->dev);
@@ -25,21 +25,15 @@ static void msm_hdmi_power_on(struct drm_bridge *bridge)
if (ret)
DRM_DEV_ERROR(dev->dev, "failed to enable pwr regulator: %d\n", ret);
- if (config->pwr_clk_cnt > 0) {
+ if (hdmi->extp_clk) {
DBG("pixclock: %lu", hdmi->pixclock);
- ret = clk_set_rate(hdmi->pwr_clks[0], hdmi->pixclock);
- if (ret) {
- DRM_DEV_ERROR(dev->dev, "failed to set pixel clk: %s (%d)\n",
- config->pwr_clk_names[0], ret);
- }
- }
+ ret = clk_set_rate(hdmi->extp_clk, hdmi->pixclock);
+ if (ret)
+ DRM_DEV_ERROR(dev->dev, "failed to set extp clk rate: %d\n", ret);
- for (i = 0; i < config->pwr_clk_cnt; i++) {
- ret = clk_prepare_enable(hdmi->pwr_clks[i]);
- if (ret) {
- DRM_DEV_ERROR(dev->dev, "failed to enable pwr clk: %s (%d)\n",
- config->pwr_clk_names[i], ret);
- }
+ ret = clk_prepare_enable(hdmi->extp_clk);
+ if (ret)
+ DRM_DEV_ERROR(dev->dev, "failed to enable extp clk: %d\n", ret);
}
}
@@ -49,15 +43,15 @@ static void power_off(struct drm_bridge *bridge)
struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
struct hdmi *hdmi = hdmi_bridge->hdmi;
const struct hdmi_platform_config *config = hdmi->config;
- int i, ret;
+ int ret;
/* TODO do we need to wait for final vblank somewhere before
* cutting the clocks?
*/
mdelay(16 + 4);
- for (i = 0; i < config->pwr_clk_cnt; i++)
- clk_disable_unprepare(hdmi->pwr_clks[i]);
+ if (hdmi->extp_clk)
+ clk_disable_unprepare(hdmi->extp_clk);
ret = regulator_bulk_disable(config->pwr_reg_cnt, hdmi->pwr_regs);
if (ret)
@@ -271,7 +265,6 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
{
struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
struct hdmi *hdmi = hdmi_bridge->hdmi;
- const struct hdmi_platform_config *config = hdmi->config;
struct msm_drm_private *priv = bridge->dev->dev_private;
struct msm_kms *kms = priv->kms;
long actual, requested;
@@ -285,8 +278,8 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
if (kms->funcs->round_pixclk)
actual = kms->funcs->round_pixclk(kms,
requested, hdmi_bridge->hdmi->encoder);
- else if (config->pwr_clk_cnt > 0)
- actual = clk_round_rate(hdmi->pwr_clks[0], requested);
+ else if (hdmi->extp_clk)
+ actual = clk_round_rate(hdmi->extp_clk, requested);
else
actual = requested;
--
2.39.2
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