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Message-Id: <20250106-drm-msm-cleanups-v1-2-271ff1c00795@linaro.org>
Date: Mon, 06 Jan 2025 09:49:05 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...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>, Simona Vetter <simona@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 2/4] drm/msm/dsi: Simplify with dev_err_probe()
dsi_clk_init() and msm_dsi_host_init() are called only from platform
driver probe function, so using dev_err_probe is both appropriate and
beneficial:
- Properly marks device deferred probe status,
- Avoids dmesg flood on probe deferrals,
- Already incorporates printing ERR value,
- Shows device name (in contrast to pr_err()),
- Makes code smaller and simpler.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 100 +++++++++++++++----------------------
1 file changed, 41 insertions(+), 59 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 86ac145076416fa7651d18820266a00d28e44b6f..4a2ad04eea7359545a088bdc63907f6b3e5615bd 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -200,7 +200,8 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
ahb_clk = msm_clk_get(msm_host->pdev, "iface");
if (IS_ERR(ahb_clk)) {
- pr_err("%s: cannot get interface clock\n", __func__);
+ dev_err_probe(dev, PTR_ERR(ahb_clk), "%s: cannot get interface clock\n",
+ __func__);
goto exit;
}
@@ -208,13 +209,13 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
ret = clk_prepare_enable(ahb_clk);
if (ret) {
- pr_err("%s: unable to enable ahb_clk\n", __func__);
+ dev_err_probe(dev, ret, "%s: unable to enable ahb_clk\n", __func__);
goto runtime_put;
}
ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
if (ret) {
- pr_err("%s: Invalid version\n", __func__);
+ dev_err_probe(dev, ret, "%s: Invalid version\n", __func__);
goto disable_clks;
}
@@ -281,39 +282,31 @@ static int dsi_clk_init(struct msm_dsi_host *msm_host)
msm_host->num_bus_clks = cfg->num_bus_clks;
ret = devm_clk_bulk_get(&pdev->dev, msm_host->num_bus_clks, msm_host->bus_clks);
- if (ret < 0) {
- dev_err(&pdev->dev, "Unable to get clocks, ret = %d\n", ret);
- goto exit;
- }
+ if (ret < 0)
+ return dev_err_probe(&pdev->dev, ret, "Unable to get clocks\n");
/* get link and source clocks */
msm_host->byte_clk = msm_clk_get(pdev, "byte");
- if (IS_ERR(msm_host->byte_clk)) {
- ret = PTR_ERR(msm_host->byte_clk);
- pr_err("%s: can't find dsi_byte clock. ret=%d\n",
- __func__, ret);
- goto exit;
- }
+ if (IS_ERR(msm_host->byte_clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(msm_host->byte_clk),
+ "%s: can't find dsi_byte clock\n",
+ __func__);
msm_host->pixel_clk = msm_clk_get(pdev, "pixel");
- if (IS_ERR(msm_host->pixel_clk)) {
- ret = PTR_ERR(msm_host->pixel_clk);
- pr_err("%s: can't find dsi_pixel clock. ret=%d\n",
- __func__, ret);
- goto exit;
- }
+ if (IS_ERR(msm_host->pixel_clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(msm_host->pixel_clk),
+ "%s: can't find dsi_pixel clock\n",
+ __func__);
msm_host->esc_clk = msm_clk_get(pdev, "core");
- if (IS_ERR(msm_host->esc_clk)) {
- ret = PTR_ERR(msm_host->esc_clk);
- pr_err("%s: can't find dsi_esc clock. ret=%d\n",
- __func__, ret);
- goto exit;
- }
+ if (IS_ERR(msm_host->esc_clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(msm_host->esc_clk),
+ "%s: can't find dsi_esc clock\n",
+ __func__);
if (cfg_hnd->ops->clk_init_ver)
ret = cfg_hnd->ops->clk_init_ver(msm_host);
-exit:
+
return ret;
}
@@ -1879,31 +1872,28 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
msm_dsi->host = &msm_host->base;
ret = dsi_host_parse_dt(msm_host);
- if (ret) {
- pr_err("%s: failed to parse dt\n", __func__);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "%s: failed to parse dt\n",
+ __func__);
msm_host->ctrl_base = msm_ioremap_size(pdev, "dsi_ctrl", &msm_host->ctrl_size);
- if (IS_ERR(msm_host->ctrl_base)) {
- pr_err("%s: unable to map Dsi ctrl base\n", __func__);
- return PTR_ERR(msm_host->ctrl_base);
- }
+ if (IS_ERR(msm_host->ctrl_base))
+ return dev_err_probe(&pdev->dev, PTR_ERR(msm_host->ctrl_base),
+ "%s: unable to map Dsi ctrl base\n", __func__);
pm_runtime_enable(&pdev->dev);
msm_host->cfg_hnd = dsi_get_config(msm_host);
- if (!msm_host->cfg_hnd) {
- pr_err("%s: get config failed\n", __func__);
- return -EINVAL;
- }
+ if (!msm_host->cfg_hnd)
+ return dev_err_probe(&pdev->dev, -EINVAL,
+ "%s: get config failed\n", __func__);
cfg = msm_host->cfg_hnd->cfg;
msm_host->id = dsi_host_get_id(msm_host);
- if (msm_host->id < 0) {
- pr_err("%s: unable to identify DSI host index\n", __func__);
- return msm_host->id;
- }
+ if (msm_host->id < 0)
+ return dev_err_probe(&pdev->dev, msm_host->id,
+ "%s: unable to identify DSI host index\n",
+ __func__);
/* fixup base address by io offset */
msm_host->ctrl_base += cfg->io_offset;
@@ -1915,10 +1905,8 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
return ret;
ret = dsi_clk_init(msm_host);
- if (ret) {
- pr_err("%s: unable to initialize dsi clks\n", __func__);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "%s: unable to initialize dsi clks\n", __func__);
msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
if (!msm_host->rx_buf) {
@@ -1931,26 +1919,20 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
return ret;
/* OPP table is optional */
ret = devm_pm_opp_of_add_table(&pdev->dev);
- if (ret && ret != -ENODEV) {
- dev_err(&pdev->dev, "invalid OPP table in device tree\n");
- return ret;
- }
+ if (ret && ret != -ENODEV)
+ return dev_err_probe(&pdev->dev, ret, "invalid OPP table in device tree\n");
msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
- if (!msm_host->irq) {
- dev_err(&pdev->dev, "failed to get irq\n");
- return -EINVAL;
- }
+ if (!msm_host->irq)
+ return dev_err_probe(&pdev->dev, -EINVAL, "failed to get irq\n");
/* do not autoenable, will be enabled later */
ret = devm_request_irq(&pdev->dev, msm_host->irq, dsi_host_irq,
IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN,
"dsi_isr", msm_host);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
- msm_host->irq, ret);
- return ret;
- }
+ if (ret < 0)
+ return dev_err_probe(&pdev->dev, ret, "failed to request IRQ%u\n",
+ msm_host->irq);
init_completion(&msm_host->dma_comp);
init_completion(&msm_host->video_comp);
--
2.43.0
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