From cdbebb3a92aca7327c88c6dc6ef5d4cd470d49fc Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Thu, 23 Feb 2023 19:44:32 +0100 Subject: [PATCH] drm/vc4: hdmi: Warn if writing to an unknown HDMI register The VC4 HDMI driver has a bunch of accessors to read from a register. The read accessor was warning when accessing an unknown register, but the write one was just returning silently. Let's make sure we warn also when writing to an unknown register. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hdmi_regs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h @@ -498,8 +498,11 @@ static inline void vc4_hdmi_write(struct field = &variant->registers[reg]; base = __vc4_hdmi_get_field_base(hdmi, field->reg); - if (!base) + if (!base) { + dev_warn(&hdmi->pdev->dev, + "Unknown register ID %u\n", reg); return; + } writel(value, base + field->offset); }