From 9d7a0c52cd6c236a4a2e2a51d98275379adbff1a Mon Sep 17 00:00:00 2001 From: =?utf-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Fri, 11 Sep 2009 20:22:30 +0200 Subject: [PATCH] drm/radeon/kms: add pm state setting function (engine only for now) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Signed-off-by: Rafał Miłecki --- drivers/gpu/drm/radeon/radeon.h | 3 +++ drivers/gpu/drm/radeon/radeon_pm.c | 20 ++++++++++++++++++++ 2 files changed, 23 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 5cdf0a5..28a10d1 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -547,6 +547,7 @@ struct radeon_pm_state { * @chip_default: original gpu state * @chip_minimum: minimum gpu state * @chip_maximum: maximum gpu state + * @last_set: allows as avoid unnecessary changes * * It keeps track of various data needed to take powermanagement decision. * Bandwith need is used to determine minimun clock of the GPU and memory. @@ -569,6 +570,8 @@ struct radeon_pm { struct radeon_pm_state chip_default; struct radeon_pm_state chip_minimum; struct radeon_pm_state chip_maximum; + + struct radeon_pm_state *last_set; }; void radeon_pm_init(struct radeon_device *rdev); diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 9b79a0a..712f5d5 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -66,6 +66,8 @@ static void radeon_pm_correct_min_max(struct radeon_pm *r_pm) void radeon_pm_init(struct radeon_device *rdev) { + rdev->pm.last_set = NULL; + DRM_DEBUG("radeon: states from AtomBIOS's firmware:\n"); radeon_pm_print("Default", &rdev->pm.chip_default); radeon_pm_print("Minimum", &rdev->pm.chip_minimum); @@ -78,3 +80,21 @@ void radeon_pm_init(struct radeon_device *rdev) radeon_pm_print("Minimum", &rdev->pm.chip_minimum); radeon_pm_print("Maximum", &rdev->pm.chip_maximum); } + +static void radeon_pm_set_state(struct radeon_device *rdev, char *name, struct radeon_pm_state *state) +{ + DRM_DEBUG("radeon: setting %s power state\n", name); + + if (rdev->pm.last_set == state) { + return; + } + + if (state->engine_clock) { + radeon_set_engine_clock(rdev, state->engine_clock); + radeon_get_engine_clock(rdev); + } + + /* TODO: set memory and voltage */ + + rdev->pm.last_set = state; +} -- 1.6.0.2