From: Jessica Zhang <quic_jesszhan@quicinc.com> To: Rob Clark <robdclark@gmail.com>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, Sean Paul <sean@poorly.run>, Marijn Suijten <marijn.suijten@somainline.org>, David Airlie <airlied@gmail.com>, "Daniel Vetter" <daniel@ffwll.ch> Cc: <quic_abhinavk@quicinc.com>, <linux-arm-msm@vger.kernel.org>, <dri-devel@lists.freedesktop.org>, <freedreno@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>, Jessica Zhang <quic_jesszhan@quicinc.com> Subject: [PATCH] drm/msm/dsi: Enable BURST_MODE for command mode for DSI 6G v1.3+ Date: Mon, 12 Jun 2023 16:37:36 -0700 [thread overview] Message-ID: <20230608-b4-add-burst-mode-v1-1-55dfbcfada55@quicinc.com> (raw) During a frame transfer in command mode, there could be frequent LP11 <-> HS transitions when multiple DCS commands are sent mid-frame or if the DSI controller is running on slow clock and is throttled. To minimize frame latency due to these transitions, it is recommended to send the frame in a single burst. This feature is supported for DSI 6G 1.3 and above, thus enable burst mode if supported. Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> --- drivers/gpu/drm/msm/dsi/dsi_host.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 744f2398a6d6..8254b06dca85 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -994,6 +994,11 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL, DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) | DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay)); + + if (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G && + msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3) + dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, + DSI_CMD_MODE_MDP_CTRL2_BURST_MODE); } } --- base-commit: dd969f852ba4c66938c71889e826aa8e5300d2f2 change-id: 20230608-b4-add-burst-mode-a5bb144069fa Best regards, -- Jessica Zhang <quic_jesszhan@quicinc.com>
WARNING: multiple messages have this Message-ID (diff)
From: Jessica Zhang <quic_jesszhan@quicinc.com> To: Rob Clark <robdclark@gmail.com>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, Sean Paul <sean@poorly.run>, Marijn Suijten <marijn.suijten@somainline.org>, David Airlie <airlied@gmail.com>, "Daniel Vetter" <daniel@ffwll.ch> Cc: linux-arm-msm@vger.kernel.org, quic_abhinavk@quicinc.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jessica Zhang <quic_jesszhan@quicinc.com>, freedreno@lists.freedesktop.org Subject: [PATCH] drm/msm/dsi: Enable BURST_MODE for command mode for DSI 6G v1.3+ Date: Mon, 12 Jun 2023 16:37:36 -0700 [thread overview] Message-ID: <20230608-b4-add-burst-mode-v1-1-55dfbcfada55@quicinc.com> (raw) During a frame transfer in command mode, there could be frequent LP11 <-> HS transitions when multiple DCS commands are sent mid-frame or if the DSI controller is running on slow clock and is throttled. To minimize frame latency due to these transitions, it is recommended to send the frame in a single burst. This feature is supported for DSI 6G 1.3 and above, thus enable burst mode if supported. Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com> --- drivers/gpu/drm/msm/dsi/dsi_host.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 744f2398a6d6..8254b06dca85 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -994,6 +994,11 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL, DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) | DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay)); + + if (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G && + msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3) + dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, + DSI_CMD_MODE_MDP_CTRL2_BURST_MODE); } } --- base-commit: dd969f852ba4c66938c71889e826aa8e5300d2f2 change-id: 20230608-b4-add-burst-mode-a5bb144069fa Best regards, -- Jessica Zhang <quic_jesszhan@quicinc.com>
next reply other threads:[~2023-06-12 23:38 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-12 23:37 Jessica Zhang [this message] 2023-06-12 23:37 ` [PATCH] drm/msm/dsi: Enable BURST_MODE for command mode for DSI 6G v1.3+ Jessica Zhang 2023-06-14 9:43 ` Marijn Suijten 2023-06-14 9:43 ` Marijn Suijten 2023-06-16 17:40 ` Jessica Zhang 2023-06-16 17:40 ` Jessica Zhang 2023-06-14 22:45 ` Dmitry Baryshkov 2023-06-14 22:45 ` Dmitry Baryshkov
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20230608-b4-add-burst-mode-v1-1-55dfbcfada55@quicinc.com \ --to=quic_jesszhan@quicinc.com \ --cc=airlied@gmail.com \ --cc=daniel@ffwll.ch \ --cc=dmitry.baryshkov@linaro.org \ --cc=dri-devel@lists.freedesktop.org \ --cc=freedreno@lists.freedesktop.org \ --cc=linux-arm-msm@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=marijn.suijten@somainline.org \ --cc=quic_abhinavk@quicinc.com \ --cc=robdclark@gmail.com \ --cc=sean@poorly.run \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.