From: "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
To: Liviu Dudau <Liviu.Dudau@arm.com>,
"airlied@linux.ie" <airlied@linux.ie>,
Brian Starkey <Brian.Starkey@arm.com>
Cc: "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@arm.com>,
"Julien Yin (Arm Technology China)" <Julien.Yin@arm.com>,
"thomas Sun (Arm Technology China)" <thomas.Sun@arm.com>,
"Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>,
Ayan Halder <Ayan.Halder@arm.com>,
"Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@arm.com>,
"Jin Gao (Arm Technology China)" <Jin.Gao@arm.com>,
"Yiqi Kang (Arm Technology China)" <Yiqi.Kang@arm.com>,
nd <nd@arm.com>, "malidp@foss.arm.com" <malidp@foss.arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"james qian wang (Arm Technology China)"
<james.qian.wang@arm.com>
Subject: [PATCH v2 04/11] drm/komeda: Add komeda_crtc_mode_valid/fixup
Date: Tue, 22 Jan 2019 11:10:57 +0000 [thread overview]
Message-ID: <20190122110932.5138-5-james.qian.wang@arm.com> (raw)
In-Reply-To: <20190122110932.5138-1-james.qian.wang@arm.com>
From: "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
komeda_crtc_mode_valid compares the input mode->clk with main engine clk
and AXI clk, and reject the mode if the required pixel clk can not be
satisfied by main engine clk and AXI-clk.
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
---
.../gpu/drm/arm/display/komeda/komeda_crtc.c | 52 +++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 95d8f2bcd523..7e0bf78da733 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -90,9 +90,61 @@ komeda_crtc_atomic_flush(struct drm_crtc *crtc,
komeda_crtc_do_flush(crtc, old);
}
+static enum drm_mode_status
+komeda_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *m)
+{
+ struct komeda_dev *mdev = crtc->dev->dev_private;
+ struct komeda_crtc *kcrtc = to_kcrtc(crtc);
+ struct komeda_pipeline *master = kcrtc->master;
+ long mode_clk, pxlclk;
+
+ if (m->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_NO_INTERLACE;
+
+ /* main clock/AXI clk must be faster than pxlclk*/
+ mode_clk = m->clock * 1000;
+ pxlclk = clk_round_rate(master->pxlclk, mode_clk);
+ if (pxlclk != mode_clk) {
+ DRM_DEBUG_ATOMIC("pxlclk doesn't support %ld Hz\n", mode_clk);
+
+ return MODE_NOCLOCK;
+ }
+
+ if (clk_round_rate(mdev->mclk, mode_clk) < pxlclk) {
+ DRM_DEBUG_ATOMIC("mclk can't satisfy the requirement of %s-clk: %ld.\n",
+ m->name, pxlclk);
+
+ return MODE_CLOCK_HIGH;
+ }
+
+ if (clk_round_rate(master->aclk, mode_clk) < pxlclk) {
+ DRM_DEBUG_ATOMIC("aclk can't satisfy the requirement of %s-clk: %ld.\n",
+ m->name, pxlclk);
+
+ return MODE_CLOCK_HIGH;
+ }
+
+ return MODE_OK;
+}
+
+static bool komeda_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *m,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct komeda_crtc *kcrtc = to_kcrtc(crtc);
+ struct komeda_pipeline *master = kcrtc->master;
+ long mode_clk = m->clock * 1000;
+
+ adjusted_mode->clock = clk_round_rate(master->pxlclk, mode_clk) / 1000;
+
+ return true;
+}
+
struct drm_crtc_helper_funcs komeda_crtc_helper_funcs = {
.atomic_check = komeda_crtc_atomic_check,
.atomic_flush = komeda_crtc_atomic_flush,
+ .mode_valid = komeda_crtc_mode_valid,
+ .mode_fixup = komeda_crtc_mode_fixup,
};
static const struct drm_crtc_funcs komeda_crtc_funcs = {
--
2.17.1
next prev parent reply other threads:[~2019-01-22 11:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-22 11:10 [PATCH v2 00/11] Implement komeda DRM-Crtc james qian wang (Arm Technology China)
2019-01-22 11:10 ` [PATCH v2 01/11] drm/komeda: Add komeda_build_display_data_flow james qian wang (Arm Technology China)
2019-01-22 11:10 ` [PATCH v2 02/11] drm/komeda: Add komeda_release_unclaimed_resources james qian wang (Arm Technology China)
2019-01-22 11:10 ` [PATCH v2 03/11] drm/komeda: Add komeda_crtc_atomic_flush james qian wang (Arm Technology China)
2019-01-22 11:10 ` james qian wang (Arm Technology China) [this message]
2019-01-22 11:11 ` [PATCH v2 05/11] drm/komeda: Add komeda_crtc_prepare/unprepare james qian wang (Arm Technology China)
2019-01-22 11:11 ` [PATCH v2 06/11] drm/komeda: Add komeda_crtc_atomic_enable/disable james qian wang (Arm Technology China)
2019-01-22 11:11 ` [PATCH v2 07/11] drm/komeda: Add komeda_crtc_vblank_enable/disable james qian wang (Arm Technology China)
2019-01-22 11:11 ` [PATCH v2 08/11] drm/komeda: Add komeda_crtc_funcs james qian wang (Arm Technology China)
2019-01-22 11:11 ` [PATCH v2 09/11] drm/komeda: Add komeda_kms_check james qian wang (Arm Technology China)
2019-01-22 11:11 ` [PATCH v2 10/11] drm/komeda: Add sysfs attribute: core_id and config_id james qian wang (Arm Technology China)
2019-01-22 11:12 ` [PATCH v2 11/11] drm/komeda: Expose bus_width to Komeda-CORE james qian wang (Arm Technology China)
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