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In-Reply-To: <20251125093651.2414999-1-zhangzhijie@bosc.ac.cn> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20251125093651.2414999-1-zhangzhijie@bosc.ac.cn> Date: Tue, 25 Nov 2025 11:47:24 +0200 Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Tue, 25 Nov 2025, zhangzhijie wrote: > inb/outb VGA_SEQ_* not support on other ARCH (such as RISCV). > Should detect whether arch platform support or not. > > Signed-off-by: zhangzhijie > > Changes in v3: > 1.Rewrite Commit message. > 2. Remove likely/unlikely > > Changes in v2: > 1. vga_get/put inside the branch. Argh, I also said, "I would rather finish the discussion on the previous version before seeing a new version." Can you please stop sending new versions? It's not helping you get any of this merged. BR, Jani. > > Signed-off-by: zhangzhijie > --- > drivers/gpu/drm/i915/display/intel_vga.c | 33 +++++++++++++++++------- > 1 file changed, 23 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_vga.c b/drivers/gpu/drm/i915/display/intel_vga.c > index 6e125564db34..fda4c2cfd7cf 100644 > --- a/drivers/gpu/drm/i915/display/intel_vga.c > +++ b/drivers/gpu/drm/i915/display/intel_vga.c > @@ -41,6 +41,15 @@ static bool has_vga_pipe_sel(struct intel_display *display) > return DISPLAY_VER(display) < 7; > } > > +static bool intel_arch_support_vga_pm(struct intel_display *display) > +{ > +#if defined(CONFIG_X86) || defined(CONFIG_X86_64) > + return true; > +#else > + return false; > +#endif > +} > + > /* Disable the VGA plane that we never use */ > void intel_vga_disable(struct intel_display *display) > { > @@ -64,13 +73,15 @@ void intel_vga_disable(struct intel_display *display) > drm_dbg_kms(display->drm, "Disabling VGA plane on pipe %c\n", > pipe_name(pipe)); > > - /* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */ > - vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); > - outb(0x01, VGA_SEQ_I); > - sr1 = inb(VGA_SEQ_D); > - outb(sr1 | VGA_SR01_SCREEN_OFF, VGA_SEQ_D); > - vga_put(pdev, VGA_RSRC_LEGACY_IO); > - udelay(300); > + if (intel_arch_support_vga_pm(display)) { > + /* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */ > + vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); > + outb(0x01, VGA_SEQ_I); > + sr1 = inb(VGA_SEQ_D); > + outb(sr1 | VGA_SR01_SCREEN_OFF, VGA_SEQ_D); > + vga_put(pdev, VGA_RSRC_LEGACY_IO); > + udelay(300); > + } > > intel_de_write(display, vga_reg, VGA_DISP_DISABLE); > intel_de_posting_read(display, vga_reg); > @@ -90,9 +101,11 @@ void intel_vga_reset_io_mem(struct intel_display *display) > * sure vgacon can keep working normally without triggering interrupts > * and error messages. > */ > - vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); > - outb(inb(VGA_MIS_R), VGA_MIS_W); > - vga_put(pdev, VGA_RSRC_LEGACY_IO); > + if (intel_arch_support_vga_pm(display)) { > + vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); > + outb(inb(VGA_MIS_R), VGA_MIS_W); > + vga_put(pdev, VGA_RSRC_LEGACY_IO); > + } > } > > int intel_vga_register(struct intel_display *display) -- Jani Nikula, Intel