From: Vara Reddy <varar@codeaurora.org>
To: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, seanpaul@chromium.org
Cc: Chandan Uddaraju <chandanu@codeaurora.org>,
robdclark@gmail.com, abhinavk@codeaurora.org,
nganji@codeaurora.org, jsanka@codeaurora.org,
hoegsberg@google.com, aravindh@codeaurora.org,
dri-devel@lists.freedesktop.org,
Vara Reddy <varar@codeaurora.org>
Subject: [DPU PATCH v4 2/5] drm: add constant N value in helper file
Date: Wed, 4 Mar 2020 16:10:25 -0800 [thread overview]
Message-ID: <1583367028-19979-3-git-send-email-varar@codeaurora.org> (raw)
In-Reply-To: <1583367028-19979-1-git-send-email-varar@codeaurora.org>
From: Chandan Uddaraju <chandanu@codeaurora.org>
The constant N value (0x8000) is used by multiple DP
drivers. Define this value in header file and use this
in the existing i915 display driver.
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: Vara Reddy <varar@codeaurora.org>
---
drivers/gpu/drm/i915/display/intel_display.c | 2 +-
include/drm/drm_dp_helper.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index effc425..3c016f3 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7618,7 +7618,7 @@ static void compute_m_n(unsigned int m, unsigned int n,
* which the devices expect also in synchronous clock mode.
*/
if (constant_n)
- *ret_n = 0x8000;
+ *ret_n = DP_LINK_CONSTANT_N_VALUE;
else
*ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 51ecb51..b509e74 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1455,6 +1455,8 @@ static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux,
int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
u8 status[DP_LINK_STATUS_SIZE]);
+#define DP_LINK_CONSTANT_N_VALUE 0x8000
+
int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
--
$(echo -e 'The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project')
WARNING: multiple messages have this Message-ID (diff)
From: Vara Reddy <varar@codeaurora.org>
To: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, seanpaul@chromium.org
Cc: abhinavk@codeaurora.org, hoegsberg@google.com,
dri-devel@lists.freedesktop.org,
Vara Reddy <varar@codeaurora.org>,
aravindh@codeaurora.org,
Chandan Uddaraju <chandanu@codeaurora.org>
Subject: [DPU PATCH v4 2/5] drm: add constant N value in helper file
Date: Wed, 4 Mar 2020 16:10:25 -0800 [thread overview]
Message-ID: <1583367028-19979-3-git-send-email-varar@codeaurora.org> (raw)
In-Reply-To: <1583367028-19979-1-git-send-email-varar@codeaurora.org>
From: Chandan Uddaraju <chandanu@codeaurora.org>
The constant N value (0x8000) is used by multiple DP
drivers. Define this value in header file and use this
in the existing i915 display driver.
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: Vara Reddy <varar@codeaurora.org>
---
drivers/gpu/drm/i915/display/intel_display.c | 2 +-
include/drm/drm_dp_helper.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index effc425..3c016f3 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7618,7 +7618,7 @@ static void compute_m_n(unsigned int m, unsigned int n,
* which the devices expect also in synchronous clock mode.
*/
if (constant_n)
- *ret_n = 0x8000;
+ *ret_n = DP_LINK_CONSTANT_N_VALUE;
else
*ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 51ecb51..b509e74 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1455,6 +1455,8 @@ static inline ssize_t drm_dp_dpcd_writeb(struct drm_dp_aux *aux,
int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
u8 status[DP_LINK_STATUS_SIZE]);
+#define DP_LINK_CONSTANT_N_VALUE 0x8000
+
int drm_dp_downstream_max_clock(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
const u8 port_cap[4]);
int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
--
$(echo -e 'The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project')
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next prev parent reply other threads:[~2020-03-05 0:11 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 0:10 [DPU PATCH v4 0/5] Add support for DisplayPort driver on SnapDragon Vara Reddy
2020-03-05 0:10 ` Vara Reddy
2020-03-05 0:10 ` [DPU PATCH v4 1/5] dt-bindings: msm/dp: add bindings of DP/DP-PLL driver for Snapdragon Vara Reddy
2020-03-05 0:10 ` Vara Reddy
2020-03-10 21:24 ` Rob Herring
2020-03-10 21:24 ` Rob Herring
2020-03-19 0:48 ` Stephen Boyd
2020-03-19 0:48 ` Stephen Boyd
2020-03-27 20:18 ` varar
2020-03-27 20:18 ` varar
2020-03-05 0:10 ` Vara Reddy [this message]
2020-03-05 0:10 ` [DPU PATCH v4 2/5] drm: add constant N value in helper file Vara Reddy
2020-03-05 0:10 ` [DPU PATCH v4 3/5] drm/msm/dp: add displayPort driver support Vara Reddy
2020-03-05 0:10 ` Vara Reddy
2020-03-05 17:26 ` [Freedreno] " Jordan Crouse
2020-03-05 17:26 ` Jordan Crouse
2020-03-05 0:10 ` [DPU PATCH v4 4/5] drm/msm/dp: add support for DP PLL driver Vara Reddy
2020-03-05 0:10 ` Vara Reddy
2020-03-19 22:17 ` Stephen Boyd
2020-03-19 22:17 ` Stephen Boyd
2020-03-27 20:28 ` varar
2020-03-27 20:28 ` varar
2020-03-27 20:33 ` varar
2020-03-27 20:33 ` varar
2020-03-05 0:10 ` [DPU PATCH v4 5/5] drm/msm/dpu: add display port support in DPU Vara Reddy
2020-03-05 0:10 ` Vara Reddy
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